- stunnel-users - stunnel.org

Connection closed with a turn server backend
by pablo platt 12 Apr '14

12 Apr '14

Hi, I'm trying to tunnel TLS connection to a turn server https://code.google.com/p/rfc5766-turn-server/ The connection is closed with; SSL socket closed on SSL_read I'm using the ubuntu 12.04 package http://packages.ubuntu.com/precise/stunnel4 Am I missing a configuration option in my stunnel config? Please see my config and log bellow. ----------------------------------------------- chroot = /var/lib/stunnel4/ setuid = stunnel4 setgid = stunnel4 pid = /stunnel4.pid debug = 7 output = /stunnel.log [ssl] accept = 443 connect = 3478 cert = /etc/stunnel/cert.pem key = /etc/stunnel/key.pem ---------------------------------------------------- 2014.04.12 13:40:15 LOG7[14983:140499885700864]: No limit detected for the number of clients 2014.04.12 13:40:15 LOG7[14983:140499885700864]: signal_pipe: FD=3 allocated (non-blocking mode) 2014.04.12 13:40:15 LOG7[14983:140499885700864]: signal_pipe: FD=4 allocated (non-blocking mode) 2014.04.12 13:40:15 LOG5[14983:140499885700864]: stunnel 4.42 on x86_64-pc-linux-gnu platform 2014.04.12 13:40:15 LOG5[14983:140499885700864]: Compiled/running with OpenSSL 1.0.1 14 Mar 2012 2014.04.12 13:40:15 LOG5[14983:140499885700864]: Threading:PTHREAD SSL:ENGINE Auth:LIBWRAP Sockets:POLL,IPv6 2014.04.12 13:40:15 LOG5[14983:140499885700864]: Reading configuration from file /etc/stunnel/stunnel.conf 2014.04.12 13:40:15 LOG7[14983:140499885700864]: PRNG seeded successfully 2014.04.12 13:40:15 LOG6[14983:140499885700864]: Initializing SSL context for service ssl 2014.04.12 13:40:15 LOG4[14983:140499885700864]: Insecure file permissions on /etc/stunnel/key.pem 2014.04.12 13:40:15 LOG7[14983:140499885700864]: Certificate: /etc/stunnel/cert.pem 2014.04.12 13:40:15 LOG7[14983:140499885700864]: Certificate loaded 2014.04.12 13:40:15 LOG7[14983:140499885700864]: Key file: /etc/stunnel/key.pem 2014.04.12 13:40:15 LOG7[14983:140499885700864]: Private key loaded 2014.04.12 13:40:15 LOG7[14983:140499885700864]: Could not load DH parameters from /etc/stunnel/cert.pem 2014.04.12 13:40:15 LOG7[14983:140499885700864]: Using hardcoded DH parameters 2014.04.12 13:40:15 LOG7[14983:140499885700864]: DH initialized with 2048-bit key 2014.04.12 13:40:15 LOG7[14983:140499885700864]: ECDH initialized with curve prime256v1 2014.04.12 13:40:15 LOG7[14983:140499885700864]: SSL options set: 0x00000004 2014.04.12 13:40:15 LOG6[14983:140499885700864]: SSL context initialized 2014.04.12 13:40:15 LOG5[14983:140499885700864]: Configuration successful 2014.04.12 13:40:15 LOG7[14983:140499885700864]: libwrap_init: FD=5 allocated (blocking mode) 2014.04.12 13:40:15 LOG7[14983:140499885700864]: libwrap_init: FD=6 allocated (blocking mode) 2014.04.12 13:40:15 LOG7[14983:140499885700864]: libwrap_init: FD=6 allocated (blocking mode) 2014.04.12 13:40:15 LOG7[14983:140499885700864]: libwrap_init: FD=7 allocated (blocking mode) 2014.04.12 13:40:15 LOG7[14983:140499885700864]: libwrap_init: FD=7 allocated (blocking mode) 2014.04.12 13:40:15 LOG7[14983:140499885700864]: libwrap_init: FD=8 allocated (blocking mode) 2014.04.12 13:40:15 LOG7[14983:140499885700864]: libwrap_init: FD=8 allocated (blocking mode) 2014.04.12 13:40:15 LOG7[14983:140499885700864]: libwrap_init: FD=9 allocated (blocking mode) 2014.04.12 13:40:15 LOG7[14983:140499885700864]: libwrap_init: FD=9 allocated (blocking mode) 2014.04.12 13:40:15 LOG7[14983:140499885700864]: libwrap_init: FD=10 allocated (blocking mode) 2014.04.12 13:40:15 LOG7[14983:140499885700864]: accept socket: FD=11 allocated (non-blocking mode) 2014.04.12 13:40:15 LOG7[14983:140499885700864]: Option SO_REUSEADDR set on accept socket 2014.04.12 13:40:15 LOG7[14983:140499885700864]: Service ssl bound to 0.0.0.0:443 2014.04.12 13:40:15 LOG7[14983:140499885700864]: Service ssl opened FD=11 2014.04.12 13:40:15 LOG7[14989:140499885700864]: Created pid file /stunnel4.pid 2014.04.12 13:40:17 LOG7[14989:140499885700864]: local socket: FD=0 allocated (non-blocking mode) 2014.04.12 13:40:17 LOG7[14989:140499885700864]: Service ssl accepted FD=0 from 192.168.56.1:54561 2014.04.12 13:40:17 LOG7[14989:140499885700864]: local socket: FD=1 allocated (non-blocking mode) 2014.04.12 13:40:17 LOG7[14989:140499885700864]: Service ssl accepted FD=1 from 192.168.56.1:54562 2014.04.12 13:40:17 LOG7[14989:140499885692672]: Service ssl started 2014.04.12 13:40:17 LOG7[14989:140499885692672]: Option TCP_NODELAY set on local socket 2014.04.12 13:40:17 LOG7[14989:140499885692672]: Waiting for a libwrap process 2014.04.12 13:40:17 LOG7[14989:140499885692672]: Acquired libwrap process #0 2014.04.12 13:40:17 LOG7[14989:140499885790976]: Service ssl started 2014.04.12 13:40:17 LOG7[14989:140499885790976]: Option TCP_NODELAY set on local socket 2014.04.12 13:40:17 LOG7[14989:140499885790976]: Waiting for a libwrap process 2014.04.12 13:40:17 LOG7[14989:140499885790976]: Acquired libwrap process #1 2014.04.12 13:40:17 LOG7[14989:140499885692672]: Releasing libwrap process #0 2014.04.12 13:40:17 LOG7[14989:140499885692672]: Released libwrap process #0 2014.04.12 13:40:17 LOG7[14989:140499885692672]: Service ssl permitted by libwrap from 192.168.56.1:54562 2014.04.12 13:40:17 LOG5[14989:140499885692672]: Service ssl accepted connection from 192.168.56.1:54562 2014.04.12 13:40:17 LOG7[14989:140499885692672]: SSL state (accept): before/accept initialization 2014.04.12 13:40:17 LOG7[14989:140499885692672]: SSL state (accept): SSLv3 read client hello A 2014.04.12 13:40:17 LOG7[14989:140499885692672]: SSL state (accept): SSLv3 write server hello A 2014.04.12 13:40:17 LOG7[14989:140499885692672]: SSL state (accept): SSLv3 write certificate A 2014.04.12 13:40:17 LOG7[14989:140499885692672]: SSL state (accept): SSLv3 write key exchange A 2014.04.12 13:40:17 LOG7[14989:140499885692672]: SSL state (accept): SSLv3 write server done A 2014.04.12 13:40:17 LOG7[14989:140499885692672]: SSL state (accept): SSLv3 flush data 2014.04.12 13:40:17 LOG7[14989:140499885790976]: Releasing libwrap process #1 2014.04.12 13:40:17 LOG7[14989:140499885790976]: Released libwrap process #1 2014.04.12 13:40:17 LOG7[14989:140499885790976]: Service ssl permitted by libwrap from 192.168.56.1:54561 2014.04.12 13:40:17 LOG5[14989:140499885790976]: Service ssl accepted connection from 192.168.56.1:54561 2014.04.12 13:40:17 LOG7[14989:140499885790976]: SSL state (accept): before/accept initialization 2014.04.12 13:40:17 LOG7[14989:140499885790976]: SSL state (accept): SSLv3 read client hello A 2014.04.12 13:40:17 LOG7[14989:140499885790976]: SSL state (accept): SSLv3 write server hello A 2014.04.12 13:40:17 LOG7[14989:140499885790976]: SSL state (accept): SSLv3 write certificate A 2014.04.12 13:40:17 LOG7[14989:140499885790976]: SSL state (accept): SSLv3 write key exchange A 2014.04.12 13:40:17 LOG7[14989:140499885790976]: SSL state (accept): SSLv3 write server done A 2014.04.12 13:40:17 LOG7[14989:140499885790976]: SSL state (accept): SSLv3 flush data 2014.04.12 13:40:17 LOG7[14989:140499885692672]: SSL state (accept): SSLv3 read client key exchange A 2014.04.12 13:40:17 LOG7[14989:140499885692672]: SSL state (accept): SSLv3 read finished A 2014.04.12 13:40:17 LOG7[14989:140499885692672]: SSL state (accept): SSLv3 write session ticket A 2014.04.12 13:40:17 LOG7[14989:140499885692672]: SSL state (accept): SSLv3 write change cipher spec A 2014.04.12 13:40:17 LOG7[14989:140499885692672]: SSL state (accept): SSLv3 write finished A 2014.04.12 13:40:17 LOG7[14989:140499885692672]: SSL state (accept): SSLv3 flush data 2014.04.12 13:40:17 LOG7[14989:140499885692672]: 0 items in the session cache 2014.04.12 13:40:17 LOG7[14989:140499885692672]: 0 client connects (SSL_connect()) 2014.04.12 13:40:17 LOG7[14989:140499885692672]: 0 client connects that finished 2014.04.12 13:40:17 LOG7[14989:140499885692672]: 0 client renegotiations requested 2014.04.12 13:40:17 LOG7[14989:140499885692672]: 2 server connects (SSL_accept()) 2014.04.12 13:40:17 LOG7[14989:140499885692672]: 1 server connects that finished 2014.04.12 13:40:17 LOG7[14989:140499885692672]: 0 server renegotiations requested 2014.04.12 13:40:17 LOG7[14989:140499885692672]: 0 session cache hits 2014.04.12 13:40:17 LOG7[14989:140499885692672]: 0 external session cache hits 2014.04.12 13:40:17 LOG7[14989:140499885692672]: 0 session cache misses 2014.04.12 13:40:17 LOG7[14989:140499885692672]: 0 session cache timeouts 2014.04.12 13:40:17 LOG6[14989:140499885692672]: SSL accepted: new session negotiated 2014.04.12 13:40:17 LOG6[14989:140499885692672]: Negotiated ciphers: ECDHE-RSA-AES128-GCM-SHA256 TLSv1.2 Kx=ECDH Au=RSA Enc=AESGCM(128) Mac=AEAD 2014.04.12 13:40:17 LOG7[14989:140499885692672]: remote socket: FD=2 allocated (non-blocking mode) 2014.04.12 13:40:17 LOG6[14989:140499885692672]: connect_blocking: connecting 192.169.56.300:3478 2014.04.12 13:40:17 LOG7[14989:140499885692672]: connect_blocking: s_poll_wait 192.169.56.300:3478: waiting 10 seconds 2014.04.12 13:40:17 LOG5[14989:140499885692672]: connect_blocking: connected 192.169.56.300:3478 2014.04.12 13:40:17 LOG5[14989:140499885692672]: Service ssl connected remote server from 192.169.56.300:59744 2014.04.12 13:40:17 LOG7[14989:140499885692672]: Remote FD=2 initialized 2014.04.12 13:40:17 LOG7[14989:140499885692672]: Option TCP_NODELAY set on remote socket 2014.04.12 13:40:17 LOG7[14989:140499885790976]: SSL state (accept): SSLv3 read client key exchange A 2014.04.12 13:40:17 LOG7[14989:140499885790976]: SSL state (accept): SSLv3 read finished A 2014.04.12 13:40:17 LOG7[14989:140499885790976]: SSL state (accept): SSLv3 write session ticket A 2014.04.12 13:40:17 LOG7[14989:140499885790976]: SSL state (accept): SSLv3 write change cipher spec A 2014.04.12 13:40:17 LOG7[14989:140499885790976]: SSL state (accept): SSLv3 write finished A 2014.04.12 13:40:17 LOG7[14989:140499885790976]: SSL state (accept): SSLv3 flush data 2014.04.12 13:40:17 LOG7[14989:140499885790976]: 0 items in the session cache 2014.04.12 13:40:17 LOG7[14989:140499885790976]: 0 client connects (SSL_connect()) 2014.04.12 13:40:17 LOG7[14989:140499885790976]: 0 client connects that finished 2014.04.12 13:40:17 LOG7[14989:140499885790976]: 0 client renegotiations requested 2014.04.12 13:40:17 LOG7[14989:140499885790976]: 2 server connects (SSL_accept()) 2014.04.12 13:40:17 LOG7[14989:140499885790976]: 2 server connects that finished 2014.04.12 13:40:17 LOG7[14989:140499885790976]: 0 server renegotiations requested 2014.04.12 13:40:17 LOG7[14989:140499885790976]: 0 session cache hits 2014.04.12 13:40:17 LOG7[14989:140499885790976]: 0 external session cache hits 2014.04.12 13:40:17 LOG7[14989:140499885790976]: 0 session cache misses 2014.04.12 13:40:17 LOG7[14989:140499885790976]: 0 session cache timeouts 2014.04.12 13:40:17 LOG6[14989:140499885790976]: SSL accepted: new session negotiated 2014.04.12 13:40:17 LOG6[14989:140499885790976]: Negotiated ciphers: ECDHE-RSA-AES128-GCM-SHA256 TLSv1.2 Kx=ECDH Au=RSA Enc=AESGCM(128) Mac=AEAD 2014.04.12 13:40:17 LOG7[14989:140499885692672]: SSL socket closed on SSL_read 2014.04.12 13:40:17 LOG7[14989:140499885692672]: Sending socket write shutdown 2014.04.12 13:40:17 LOG5[14989:140499885692672]: Connection closed: 0 bytes sent to SSL, 0 bytes sent to socket 2014.04.12 13:40:17 LOG7[14989:140499885692672]: Service ssl finished (1 left) 2014.04.12 13:40:17 LOG7[14989:140499885692672]: str_stats: 0 block(s), 0 byte(s) 2014.04.12 13:40:17 LOG7[14989:140499885790976]: remote socket: FD=1 allocated (non-blocking mode) 2014.04.12 13:40:17 LOG6[14989:140499885790976]: connect_blocking: connecting 192.169.56.300:3478 2014.04.12 13:40:17 LOG7[14989:140499885790976]: connect_blocking: s_poll_wait 192.169.56.300:3478: waiting 10 seconds 2014.04.12 13:40:17 LOG5[14989:140499885790976]: connect_blocking: connected 192.169.56.300:3478 2014.04.12 13:40:17 LOG5[14989:140499885790976]: Service ssl connected remote server from 192.169.56.300:59745 2014.04.12 13:40:17 LOG7[14989:140499885790976]: Remote FD=1 initialized 2014.04.12 13:40:17 LOG7[14989:140499885790976]: Option TCP_NODELAY set on remote socket 2014.04.12 13:40:17 LOG7[14989:140499885790976]: SSL socket closed on SSL_read 2014.04.12 13:40:17 LOG7[14989:140499885790976]: Sending socket write shutdown 2014.04.12 13:40:17 LOG5[14989:140499885790976]: Connection closed: 0 bytes sent to SSL, 0 bytes sent to socket 2014.04.12 13:40:17 LOG7[14989:140499885790976]: Service ssl finished (0 left) 2014.04.12 13:40:17 LOG7[14989:140499885790976]: str_stats: 0 block(s), 0 byte(s)

1 0

Bleedingheart Bug in OpenSSL
by Burak Say 11 Apr '14

11 Apr '14

Hello, When do you think you can release a patch to use OpenSSL 1.0.1g instead of 1.0.1f? Thanks, Burak Say

4 5

Re: [stunnel-users] Some troubles with PROXY protocol
by Alexey V. Drozdov 10 Apr '14

10 Apr '14

Hi, Mike! I have analyze your fix and found mistake :( We will switch to target SNI section after init_ssl(c) only, thereby init_remote(c) will be connect to wrong destination. if(!c->opt->option.client && c->opt->protocol<0 #ifndef OPENSSL_NO_TLSEXT && !c->opt->servername_list_head #endif ) { /* server mode and no protocol negotiation needed */ init_ssl(c); init_remote(c); } else { /* client mode or protocol negotiation enabled */ protocol(c, PROTOCOL_PRE_CONNECT); init_remote(c); <<<<<<<<<< Incorrect destination protocol(c, PROTOCOL_PRE_SSL); init_ssl(c); <<<<<<<<<<< switch to target SNI config section only there protocol(c, PROTOCOL_POST_SSL); } /Alexey V. Drozdov e-mail: anyquist(a)yandex.ru

2 1

stunnel 5.01 released
by Michal Trojnara 08 Apr '14

08 Apr '14

Dear Users, I have released version 5.01 of stunnel. The ChangeLog entry: Version 5.01, 2014.04.08, urgency: HIGH: * Security bugfixes - OpenSSL DLLs updated to version 1.0.1g. This version mitigates TLS heartbeat read overrun (CVE-2014-0160). * New features - X.509 extensions added to the created self-signed stunnel.pem. - "FIPS = no" also allowed in non-FIPS builds of stunnel. - Search all certificates with the same subject name for a matching public key rather than only the first one (thx to Leon Winter). - Create logs in the local application data folder if stunnel folder is not writable on Win32. * Bugfixes - close_notify not sent when SSL still has some data buffered. - Protocol negotiation with server-side SNI fixed. - A Mac OS X missing symbols fixed. - Win32 configuration file reload crash fixed. - Added s_pool_free() on exec+connect service retires. - Line-buffering enforced on stderr output. Home page: https://www.stunnel.org/ Download: https://www.stunnel.org/downloads.html SHA-256 hash for stunnel-5.01.tar.gz: 2565bf58ffe8a612304c64df621105b2e42d6e389e815ed4205dbeec4f3f886b Best regards, Mike

1 0

Re: [stunnel-users] public domain [Patch] Support multiple X509 client certificates with same CN
by Leon Winter 01 Apr '14

01 Apr '14

Hi Michal, > >What license do you need the patch to be? > > Preferably public domain, but any GPL-compatbile and non-copyleft license > should be fine. I hereby release my patches to stunnel for support of muliple client certificates with the same CN into the public domain. Best regards, Leon Winter

2 2

Some troubles with PROXY protocol
by Alexey V. Drozdov 31 Mar '14

31 Mar '14

Hi, I try to use PROXY protocol ability for my virtual server, but this options work for root section only. E.g. it not work for this simple case: [virtual_server] accept = 443 connect = localhost:1081 cert = /etc/stunnel/serverCA.crt key = /etc/stunnel/serverCA.key verify = 2 CAfile = /etc/stunnel/serverCA.crt [server_ru] sni = virtual_server:server.ru cert = /etc/stunnel/server.cer key = /etc/stunnel/server.pem connect = localhost:7000 protocol = proxy <-- option don not work there This problem exist due some code bug: NOEXPORT void client_try(CLI *c) { init_local(c); if(!c->opt->option.client && c->opt->protocol<0) // <-- condition is true in spite of setup protorol=proxy { init_ssl(c); // we'll switch to target section (c->opt) there only! init_remote(c); } else { protocol(c, PROTOCOL_PRE_CONNECT); init_remote(c); protocol(c, PROTOCOL_PRE_SSL); init_ssl(c); protocol(c, PROTOCOL_POST_SSL); } ... Simple adhoc solution work for me: if(!c->opt->option.client && c->opt->protocol<0) // <-- condition is true in spite of setup protorol=proxy { init_ssl(c); init_remote(c); // force initiate PROXY protocol protocol(c, PROTOCOL_PRE_SSL); } It's crutch and not general solution certain. But some code refactoring needs for more correct fix. I think that this bug will be fixed in future versions. Thanks for stunnel! :) /Alexey V. Drozdov e-mail: anyquist(a)yandex.ru

2 1

Build failure of stunned 5.00 under OS X.
by Marius Schamschula 28 Mar '14

28 Mar '14

Hi there, After having built many prior releases of stunned for OS X, I ran into the following issue with version 5.0: /bin/sh ../libtool --tag=CC --mode=link gcc -pthread -fstack-protector -fPIE -g -O2 -Wall -Wextra -Wno-long-long -pedantic -L/usr/local/ssl/lib64 -L/usr/local/ssl/lib -lssl -lcrypto -o stunnel stunnel-str.o stunnel-file.o stunnel-client.o stunnel-log.o stunnel-options.o stunnel-protocol.o stunnel-network.o stunnel-resolver.o stunnel-ssl.o stunnel-ctx.o stunnel-verify.o stunnel-sthreads.o stunnel-fd.o stunnel-stunnel.o stunnel-pty.o stunnel-libwrap.o stunnel-ui_unix.o -lz -lpthread -lwrap libtool: link: gcc -pthread -fstack-protector -fPIE -g -O2 -Wall -Wextra -Wno-long-long -pedantic -o stunnel stunnel-str.o stunnel-file.o stunnel-client.o stunnel-log.o stunnel-options.o stunnel-protocol.o stunnel-network.o stunnel-resolver.o stunnel-ssl.o stunnel-ctx.o stunnel-verify.o stunnel-sthreads.o stunnel-fd.o stunnel-stunnel.o stunnel-pty.o stunnel-libwrap.o stunnel-ui_unix.o -L/usr/local/ssl/lib64 -L/usr/local/ssl/lib -lssl -lcrypto -lz -lpthread -lwrap -pthread ld: warning: directory not found for option '-L/usr/local/ssl/lib64' Undefined symbols for architecture x86_64: "_load_icon_default", referenced from: _parse_global_option in stunnel-options.o "_load_icon_file", referenced from: _parse_global_option in stunnel-options.o ld: symbol(s) not found for architecture x86_64 collect2: ld returned 1 exit status he ewxat same issue under 10.8 and 10.9. Makefile:471: recipe for target 'stunnel' failed make[2]: *** [stunnel] Error 1 make[2]: Leaving directory '/private/tmp/stunnel-5.00/src' Makefile:339: recipe for target 'all' failed make[1]: *** [all] Error 2 make[1]: Leaving directory '/private/tmp/stunnel-5.00/src' Makefile:365: recipe for target 'all-recursive' failed make: *** [all-recursive] Error 1 This is the OS X 10.7 build, but I had the same issue under 10.8 and 10.9. Marius -- Marius Schamschula

1 0

Access to Packet Content
by Michael Carlino (RIT Student) 26 Mar '14

26 Mar '14

Hello stunnel users, I am working with what seems to be the standard stunnel HTTPS configuration. I have two instances of stunnel, one as a client and one as a server. The client accepts connections from a browser. The server sits in front of tomcat. If works like a charm (of course!). What I need to do seems simple, and I will try to keep my description of it generic. In the client stunnel I need to make a small change to the HTTP packet. I need to add some data to it. At the server side I need to access that added data. The server stunnel may close the SSL session based on that data. So, my question is: can I obtain access to the packet before it's encrypted and sent out over SSL? Can I get access to the decrypted packet before it's sent on to tomcat? I know that as a proxy stunnel has to be and tries to be general in nature. I am not concerned (right now) with developing a feature that will become available to others later. I don't mind if my changes make my development version of stunnel single-purpose. My work is academic and proof-of-concept in it's nature. I have collected references and a text book (Network Security with OpenSSL by Viega et al). I will continue to walk through and explore the code. Are there any programmer resources I can obtain? I see the occasional URL in the stunnel source code. I will have to check these URLs. --- I just now pursued http://haproxy.1wt.eu/download/1.5/doc/proxy-protocol.txt, and I see that there is a patch that allows stunnel to do an initial modification to the HTTP request to insert a X-Forwarded-For header. This sounds like what I need to do! I am going to look for that patch. I hope the source code for the patch is available. Please, if anyone has any advice, war stories, criticism, whatever... I would very much appreciate it. Regards.

4 8

Tool Information
by "Cortenai Swoboda Reinbrecht" 14 Mar '14

14 Mar '14

1 0

stunnel.cnf should set keyUsage = keyCertSign
by Athir Nuaimi 11 Mar '14

11 Mar '14

I'm trying to write a go program to connect to an stunnel server and verify the certificate but it fails because the go language requires that self-signed certs have keyCertSign set in the keyUsages. the default stunnel.cnf does not set this. According to the following message thread this is required by RFC 5280. https://groups.google.com/forum/#!msg/golang-nuts/LfLHjVkeSj8/YyP-LSPEytEJ The solution to this is to add 'keyUsage = keyCertSign' to the stunnel.cnf.

3 3

Please allow fips=no even if !USE_FIPS
by Andy Lutomirski 10 Mar '14

10 Mar '14

It's currently impossible to make a stunnel config file that works with reasonable settings on both a USE_FIPS build (e.g. Fedora) and a !USE_FIPS build (e.g. Ubuntu). This is because, if USE_FIPS, fips defaults to "yes" (which is, for most purposes, a serious problem) and, if !USE_FIPS, the setting 'fips=no' prevents stunnel from starting. I've observed this on stunnel 4.53, and it looks like the same issue exists in the source in stunnel 4.56 and 5.00. (Note that, if targetting stunnel 5.00, this is less of an issue, since the default value of 'fips' changed. Nonetheless, it would be nice to accept 'fips=no' to avoid surprises.) Thanks, Andy

1 0

Stunnel Install error on Solaris10 X86
by Ashok Kumar G 10 Mar '14

10 Mar '14

Hi, I am trying to install stunnel-4.56 on my Solaris10 server. configure step completed successfully. But make and make install commands failed miserably. # gzip -dc stunnel-3.8.tar.gz | tar -xvf - # cd stunnel-3.8 # ./configure bash-3.00# make bash: make: command not found bash-3.00# export PATH=/usr/ccs/bin bash-3.00# make bash: line 8: sed: command not found *** Error code 127 The following command caused the error: fail= failcom='exit 1'; \ for f in x $MAKEFLAGS; do \ case $f in \ *=* | --[!k]*);; \ *k*) failcom='fail=yes';; \ esac; \ done; \ dot_seen=no; \ target=`echo all-recursive | sed s/-recursive//`; \ list='src doc tools'; for subdir in $list; do \ echo "Making $target in $subdir"; \ if test "$subdir" = "."; then \ dot_seen=yes; \ local_target="$target-am"; \ else \ local_target="$target"; \ fi; \ (CDPATH="${ZSH_VERSION+.}:" && cd $subdir && make $local_target) \ || eval $failcom; \ done; \ if test "$dot_seen" = "no"; then \ make "$target-am" || exit 1; \ fi; test -z "$fail" make: Fatal error: Command failed for target `all-recursive' bash-3.00# make install bash: line 8: sed: command not found *** Error code 127 The following command caused the error: fail= failcom='exit 1'; \ for f in x $MAKEFLAGS; do \ case $f in \ *=* | --[!k]*);; \ *k*) failcom='fail=yes';; \ esac; \ done; \ dot_seen=no; \ target=`echo install-recursive | sed s/-recursive//`; \ list='src doc tools'; for subdir in $list; do \ echo "Making $target in $subdir"; \ if test "$subdir" = "."; then \ dot_seen=yes; \ local_target="$target-am"; \ else \ local_target="$target"; \ fi; \ (CDPATH="${ZSH_VERSION+.}:" && cd $subdir && make $local_target) \ || eval $failcom; \ done; \ if test "$dot_seen" = "no"; then \ make "$target-am" || exit 1; \ fi; test -z "$fail" make: Fatal error: Command failed for target `install-recursive' bash-3.00# bash-3.00# bash-3.00# echo $PATH /usr/ccs/bin ========================================================= * 2nd Try:* ========================================================= bash-3.00# echo $PATH /usr/sbin:/usr/bin bash-3.00# PATH=$PATH:/usr/sbin:/usr/sfw/bin:/usr/ccs/bin bash-3.00# LD_LIBARAY_PATH=/lib:/usr/lib:/usr/local/lib bash-3.00# cd /opt/softwares/stunnel-4.56 bash-3.00# make Making all in src make all-am Making all in doc Making all in tools bash-3.00# make install Making install in src test -z "/usr/local/bin" || ../auto/install-sh -c -d "/usr/local/bin" /bin/bash ../libtool --mode=install ../auto/install-sh -c stunnel '/usr/local/bin' libtool: install: ../auto/install-sh -c stunnel /usr/local/bin/stunnel test -z "/usr/local/bin" || ../auto/install-sh -c -d "/usr/local/bin" ../auto/install-sh -c stunnel3 '/usr/local/bin' test -z "/usr/local/lib/stunnel" || ../auto/install-sh -c -d "/usr/local/lib/stunnel" /bin/bash ../libtool --mode=install ../auto/install-sh -c libstunnel.la'/usr/local/lib/stunnel' libtool: install: ../auto/install-sh -c .libs/libstunnel.so /usr/local/lib/stunnel/libstunnel.so libtool: install: chmod +x /usr/local/lib/stunnel/libstunnel.so libtool: install: ../auto/install-sh -c .libs/libstunnel.lai /usr/local/lib/stunnel/libstunnel.la ---------------------------------------------------------------------- Libraries have been installed in: /usr/local/lib/stunnel If you ever happen to want to link against installed libraries in a given directory, LIBDIR, you must either use libtool, and specify the full pathname of the library, or use the `-LLIBDIR' flag during linking and do at least one of the following: - add LIBDIR to the `LD_LIBRARY_PATH' environment variable during execution - use the `-RLIBDIR' linker flag See any operating system documentation about shared libraries for more information, such as the ld(1) and ld.so(8) manual pages. ---------------------------------------------------------------------- Making install in doc test -z "/usr/local/share/doc/stunnel" || ../auto/install-sh -c -d "/usr/local/share/doc/stunnel" ../auto/install-sh -c -m 644 stunnel.html stunnel.pl.html stunnel.fr.html '/usr/local/share/doc/stunnel' test -z "/usr/local/share/man/man8" || ../auto/install-sh -c -d "/usr/local/share/man/man8" ../auto/install-sh -c -m 644 stunnel.8 stunnel.pl.8 stunnel.fr.8 '/usr/local/share/man/man8' Making install in tools test -z "/usr/local/etc/stunnel" || ../auto/install-sh -c -d "/usr/local/etc/stunnel" ../auto/install-sh -c -m 644 stunnel.conf-sample '/usr/local/etc/stunnel' if test ! -r /usr/local/etc/stunnel/stunnel.pem; then \ if test -r "/dev/urandom"; then \ dd if="/dev/urandom" of=stunnel.rnd bs=256 count=1; \ RND="-rand stunnel.rnd"; \ else \ RND=""; \ fi; \ /usr//bin/openssl req -new -x509 -days 365 $RND \ -config ./stunnel.cnf \ -out stunnel.pem -keyout stunnel.pem; \ /usr//bin/openssl gendh $RND 1024 >> stunnel.pem; \ /usr//bin/openssl x509 -subject -dates -fingerprint -noout -in stunnel.pem; \ ../auto/install-sh -c -m 600 stunnel.pem /usr/local/etc/stunnel/stunnel.pem; \ rm stunnel.pem; \ fi 1+0 records in 1+0 records out bash: line 7: /usr//bin/openssl: No such file or directory *** Error code 1 make: Fatal error: Command failed for target `install-data-local' Current working directory /opt/softwares/stunnel-4.56/tools *** Error code 1 The following command caused the error: make install-exec-am install-data-am make: Fatal error: Command failed for target `install-am' Current working directory /opt/softwares/stunnel-4.56/tools *** Error code 1 The following command caused the error: fail= failcom='exit 1'; \ for f in x $MAKEFLAGS; do \ case $f in \ *=* | --[!k]*);; \ *k*) failcom='fail=yes';; \ esac; \ done; \ dot_seen=no; \ target=`echo install-recursive | sed s/-recursive//`; \ list='src doc tools'; for subdir in $list; do \ echo "Making $target in $subdir"; \ if test "$subdir" = "."; then \ dot_seen=yes; \ local_target="$target-am"; \ else \ local_target="$target"; \ fi; \ (CDPATH="${ZSH_VERSION+.}:" && cd $subdir && make $local_target) \ || eval $failcom; \ done; \ if test "$dot_seen" = "no"; then \ make "$target-am" || exit 1; \ fi; test -z "$fail" make: Fatal error: Command failed for target `install-recursive' bash-3.00# Can someone please help to resolve the above error. Thanks, Ashok Kumar G

2 3

Re: [stunnel-users] [Patch] Support multiple X509 client certificates with same CN
by Leon Winter 10 Mar '14

10 Mar '14

On Mon, Mar 10, 2014 at 06:34:14AM -0400, Brian Wilkins wrote: > You will have to attach appropriate software license as well. Michal may > ask for it I hereby declare my two previously sent patches to be licensed under GPL as according to the license of the stunnel project. Regards, Leon Winter

1 0

[Patch] Support multiple X509 client certificates with same CN
by Leon Winter 10 Mar '14

10 Mar '14

Hi, currently stunnel uses the X509_STORE_get_by_subject () API call to OpenSSL to retrieve the x509 client certificate in the cert_check () method (located in verify.c) to gather the client certificate from the whitelist by the common name (CN) the client presented during the TLS handshake. It then proceeds to compare both certificates bit by bit. This all works rather fine until the very moment you have more than one client certificate with the same CN. The OpenSSL API call will then return any of the certificates with the provided CN (according to internal logic). Other implementations using OpenSSL were aware of this issue and introduced logic to further iterate over the remaining certificates, retrieving any further with the same CN. See for example function X509_STORE_CTX_get1_issuer () and its comment: http://www.opensource.apple.com/source/OpenSSL/OpenSSL-12/openssl/crypto/x5… I patched stunnel 4.53 and adapted the patch to upstream version 5.00 to behave in similar fashion and can report that with these changes stunnel then also supports multiple client certificates sharing the same CN. Feel free to adapt indention as my patches aim for minimal changed lines. Best regards, Leon Winter

1 0

stunnel 5.00 released
by Michal Trojnara 10 Mar '14

10 Mar '14

Dear Users, I have released version 5.00 of stunnel. The ChangeLog entry: stunnel 5.00 disables some features previously enabled by default. Users should review whether the new defaults are appropriate for their particular deployments. Packages maintainers may consider prepending the old defaults for "fips" (if supported by their OpenSSL library), "pid" and "libwrap" to stunnel.conf during automated updates. Version 5.00, 2014.03.06, urgency: HIGH: * Security bugfixes - Added PRNG state update in fork threading (CVE-2014-0016). * New global configuration file defaults - Default "fips" option value is now "no", as FIPS mode is only helpful for compliance, and never for actual security. - Default "pid" is now "", i.e. not to create a pid file at startup. * New service-level configuration file defaults - Default "ciphers" updated to "HIGH:MEDIUM:+3DES:+DH:!aNULL:!SSLv2" due to AlFBPPS attack and bad performance of DH ciphersuites. - Default "libwrap" setting is now "no" to improve performance. * New features - OpenSSL DLLs updated to version 1.0.1f. - zlib DLL updated to version 1.2.8. - autoconf scripts upgraded to version 2.69. - TLS 1.1 and TLS 1.2 are now allowed in the FIPS mode. - New service-level option "redirect" to redirect SSL client connections on authentication failures instead of rejecting them. - New global "engineDefault" configuration file option to control which OpenSSL tasks are delegated to the current engine. Available tasks: ALL, RSA, DSA, ECDH, ECDSA, DH, RAND, CIPHERS, DIGESTS, PKEY, PKEY_CRYPTO, PKEY_ASN1. - New service-level configuration file option "engineId" to select the engine by identifier, e.g. "engineId = capi". - New global configuration file option "log" to control whether to append (the default), or to overwrite log file while (re)opening. - Different taskbar icon colors to indicate the service state. - New global configuration file options "iconIdle", "iconActive", and "iconError" to select status icon on GUI taskbar. - Removed the limit of 63 stunnel.conf sections on Win32 platform. - Installation of a sample certificate was moved to a separate "cert" target in order to allow unattended (e.g. scripted) installations. - Reduced length of the logged thread identifier. It is still based on the OS thread ID, and thus not unique over long periods of time. - Improved readability of error messages printed when stunnel refuses to start due to a critical error. * Bugfixes - LD_PRELOAD Solaris compatibility bug fixed (thx to Norm Jacobs). - CRYPTO_NUM_LOCKS replaced with CRYPTO_num_locks() to improve binary compatibility with diverse builds of OpenSSL (thx to Norm Jacobs). - Corrected round-robin failover behavior under heavy load. - Numerous fixes in the engine support code. - On Win32 platform .rnd file moved from c:\ to the stunnel folder. Home page: https://www.stunnel.org/ Download: https://www.stunnel.org/downloads.html SHA-256 hash for stunnel-5.00.tar.gz: 88986d52a7ef1aff0cc26fc0a9830361c991baba7ee591d5cf1cc8baef75bc13 Best regards, Mike

3 5

Weird problem starting stunnel
by Matthew Lunnon 05 Mar '14

05 Mar '14

Hello, Can anyone enlighten me on the following: I have installed stunnel up on my Mac (OS X Lion) and it all runs just fine. When I put this on another machine (OS X Mountain Lion) stunnel refuses to start. I include the output and the stunnel.conf file below. We have some experience of stunnel as we have been using it in both client and server mode on Windows and RedHat for years but none of my colleagues can give me much help here. It looks to me like although stunnel is reporting that it is starting with the correct stunnel.conf file it is actually using something else as: 1) no stunnel.log file is created 2) after successfully seeding the PRNG it seems to be Initializing inetd mode and starting as a service when this should be starting in client mode. (The only way I can get it to do something similar on the machine that works is to remove all the service definitions and put in a line service = SERVICE when it blows up but with a slightly different error about needing an end/connection point (not sure the exact error) and then it fails. Even so in this case it will still create an output log in the correct place) My thoughts are that it might be something to do with the installation process of stunnel that hasn't been followed properly or some kind of permissions issue. Apologies if I am being dim but I am at a bit of a loss to explain what is going on here. I do not have direct access to the second machine and am trying to support it over the phone. Thanks for any help. Matthew ========================================================================== = Here is the output: ========================================================================== Last login: Fri Jan 31 10:44:30 on ttys000 Administrator:~ admin$ cd stunnel Administrator:stunnel admin$ stunnel /Users/admin/stunnel/stunnel.conf Clients allowed=125 stunnel 4.56 on x86_64-apple-darwin11.4.2 platform Compiled with OpenSSL 0.9.8r 8 Feb 2011 Running with OpenSSL 0.9.8y 5 Feb 2013 Update OpenSSL shared libraries or rebuild stunnel Threading:PTHREAD Sockets:SELECT,IPv6 SSL:ENGINE,OCSP Auth:LIBWRAP Reading configuration from file /Users/admin/stunnel/stunnel.conf Compression not enabled Snagged 64 random bytes from /Users/admin/.rnd Wrote 1024 new random bytes to /Users/admin/.rnd PRNG seeded successfully Initializing inetd mode configuration Service [stunnel]: SSL server needs a certificate str_stats: 2 block(s), 45 data byte(s), 116 control byte(s) Administrator:stunnel admin$ ========================================================================== = And here is the stunnel.conf file: ========================================================================== ; Sample stunnel configuration file for Win32 by Michal Trojnara 2002-2012 ; Some options used here may be inadequate for your particular configuration ; This sample file does *not* represent stunnel.conf defaults ; Please consult the manual for detailed description of available options ; ************************************************************************** ; * Global options * ; ************************************************************************** ; Debugging stuff (may useful for troubleshooting) debug = 7 ;output = stunnel.log ; Disable FIPS mode to allow non-approved protocols and algorithms ;fips = no client=yes sslVersion=SSLv3 output=/Users/admin/stunnel/stunnel.log pid=/Users/admin/stunnel/stunnel.pid ; ************************************************************************** ; * Service defaults may also be specified in individual service sections * ; ************************************************************************** ; Certificate/key is needed in server mode and optional in client mode ;cert = rwa2012.clientkeycert.pem ;key = stunnel.pem ; Authentication stuff needs to be configured to prevent MITM attacks ; It is not enabled by default! verify = 2 ;verify = 0 ; Don't forget to c_rehash CApath ;CApath = certs ; It's often easier to use CAfile CAfile = /Users/admin/stunnel/ca.crt ; Don't forget to c_rehash CRLpath ;CRLpath = crls ; Alternatively CRLfile can be used ;CRLfile = crls.pem ; Disable support for insecure SSLv2 protocol options = NO_SSLv2 ; Workaround for Eudora bug ;options = DONT_INSERT_EMPTY_FRAGMENTS ; These options provide additional security at some performance degradation ;options = SINGLE_ECDH_USE ;options = SINGLE_DH_USE ; ************************************************************************** ; * Service definitions (at least one service has to be defined) * ; ************************************************************************** [Gounder] cert = /Users/admin/stunnel/gounder20141401011000.pem accept=8128 connect=311.219.292.173:9876 [Gounder IJ] cert = /Users/admin/stunnel/gounder20141401011000.pem accept=9128 connect=311.219.292.173:9875 -- Matthew Lunnon Technical Consultant RWA Ltd. mlunnon(a)rwa-net.co.uk Tel: +44 (0)29 2081 5056 www.rwa-net.co.uk

2 1

Stunnel use with Juniper VPN
by Nancy Shortall 19 Feb '14

19 Feb '14

Looking for help in planning a point to point VPN between a fixed site and a mobile site. The fixed site currently uses Stunnel and the mobile site must use a Juniper VPN SSG 140 hardware VPN device. Would this configuration be possible?

1 0

Re: [stunnel-users] Compatible with windows 8.1?
by peter 08 Feb '14

08 Feb '14

Is the stunnel compatible with windows 8.1? I am having problems after updating to 8.1 Peter

1 0

DNS SSL tunnel
by Quinn Wood 07 Feb '14

07 Feb '14

Woops, starting with the forwarded ports... 192.168.1.100 UDP/5353 -> VM UDP/53 192.168.1.100 TCP/5353 -> VM TCP/53 192.168.1.100 TCP/5667 -> VM TCP/5667 [...] I am able to get DNS replies using both of dig @192.168.1.100 -p 5353 google.com A dig @192.168.1.100 -p 5353 google.com A +tcp But dig times out when I try to use dig @192.168.1.100 -p 53 google.com A The stunnel server log is here: http://sprunge.us/deLY The stunnel client log is here: http://sprunge.us/ScAC Why this is happening? I notice the three connection attempts which seems like it's relevant to the connection resets.

1 0

DNS SSL tunnel
by Quinn Wood 07 Feb '14

07 Feb '14

I am attempting to tunnel DNS traffic over stunnel using socat. I am following a guide[1] by the German Privacy Foundation. The client is my physical machine and the server is a VirtualBox virtual machine with three ports forwarded: 192.168.1.100 53/UDP My configs for stunnel are an exact match to the ones on the guide, and I am able to get a DNS reply using dig @IP [1] https://www.privacyfoundation.de/wiki/SSL-DNS

1 0

Problem in stunnel log
by sawbona＠xsmail.com 06 Feb '14

06 Feb '14

Good morning: This connection was working perfectly well up until yesterday. Now it fails and I get this text in the log: (date/time snipped for brevity's sake) --- LOG5[648:980]: FIPS mode is enabled LOG5[648:980]: Configuration successful LOG5[648:2448]: Service [gmx-POP3-SSL] accepted connection from 127.0.0.1:1212 LOG5[648:2448]: connect_blocking: connected xxx.xxx.xxx.xxx:995 LOG5[648:2448]: Service [gmx-POP3-SSL] connected remote server from 192.168.1.136:1213 LOG4[648:2448]: CERT: Verification error: self signed certificate in certificate chain LOG4[648:2448]: Certificate check failed: depth=2, /C=DE/O=Deutsche Telekom AG/OU=T-TeleSec Trust Center/CN=Deutsche Telekom Root CA 2 LOG3[648:2448]: SSL_connect: 14090086: error:14090086:SSL routines:SSL3_GET_SERVER_CERTIFICATE:certificate verify failed LOG5[648:2448]: Connection reset: 0 byte(s) sent to SSL, 0 byte(s) sent to socket --- What has happened? I have not changed anything ... This is the stunnel.conf bit: --- [gmx-POP3-SSL] client = yes accept = 20995 connect = pop.gmx.net:995 CAfile = peer-gmx-POP3-SSL.pem verify = 3 [gmx-smtp-SSL] client = yes accept = 20465 connect = mail.gmx.net:465 [gmx-IMAP-SSL] client = yes accept = 20993 connect = imap.gmx.net:993 --- Is it 'me' or is it 'them'? Thanks in advance for any input. Best regards.

1 0

Stunnel - how to make Google App Engine HTTP into HTTPS ?
by Shamun Toha Md 06 Feb '14

06 Feb '14

I have Google App Engine running in HTTP (port tcp 80), which is a daemon based service it execute back-end some python instances. Now all that works over HTTP , TCP 80, and Google App Engine itself do not have any kind of HTTPS setup, it has to be organized externally. Therefore, the biggest problem is now that how can i use stunnel to resolve this problem please? I have already tried following setup and it does not work at all. 1) if the user visit https://www.mysite.com then he hit stunnel accept=443 after that he is connected with connect=80 but user browser change into http:// instead of remaining in https:// . Which make the whole thing not working $ uname -a Linux server2 2.6.32-358.23.2.el6.x86_64 #1 SMP Wed Oct 16 18:37:12 UTC 2013 x86_64 x86_64 x86_64 GNU/Linux $ cat /etc/stunnel/stunnel.conf pid = /stunnel.pid cert=/etc/stunnel/abyhu.crt CAfile=/etc/stunnel/abyhu.ca key=/etc/stunnel/abyhu.key sslVersion = all ;socket = l:TCP_NODELAY=1 ;socket = r:TCP_NODELAY=1 client=no debug = 7 output = /var/log/stunnel.log [SSL] accept=443 connect=80 TIMEOUTclose = 0 My goal is: when user visit https://www.mysite.com it remain as https not become http:// then it is not solving the problem cause Google app engine do not have HTTPS Thank you. Best regards

3 4

Re: [stunnel-users] cross compiling stunnel-4.21 for ARM
by josealf＠rocketmail.com 03 Feb '14

03 Feb '14

Krinali, Looks like firefox can't connect to port 443 on your target IP. Are you sure there is no firewall enabled on your board? Regards, Jose -----Original Message----- From: Krinali Shah - PES <krinali.shah(a)einfochips.com> Date: Mon, 3 Feb 2014 16:47:39 To: <josealf(a)rocketmail.com> Subject: Re: [stunnel-users] cross compiling stunnel-4.21 for ARM Hi Jose, Thank you so much for your suggestion. Firefox is giving an error like "Problem Loading Page". (Plase find attached snapshot for your reference). Note - I have made sure that there are no proxy settings on firefox. Thanks, Krinali Shah ----- Original Message ----- From: josealf(a)rocketmail.com To: "Krinali Shah - PES" <krinali.shah(a)einfochips.com>, "stunnel-users" <stunnel-users-bounces(a)stunnel.org>, stunnel-users(a)stunnel.org Sent: Monday, February 3, 2014 4:21:49 PM Subject: Re: [stunnel-users] cross compiling stunnel-4.21 for ARM Krimnali, 1. Exactly which error is giving Firefox? It will give you an error if the certificate subject does not match the URL (in this case the IP). And of course, it will also complain if the certificate is self signed and/or the signing CA is unknown. 2. Why are you using such an updated stunnel version? 3. You can use openssl s_client command to troubleshoot. Google for it. Regards, Jose -----Original Message----- From: Krinali Shah - PES <krinali.shah(a)einfochips.com> Sender: "stunnel-users" <stunnel-users-bounces(a)stunnel.org> Date: Mon, 3 Feb 2014 15:34:28 To: <stunnel-users(a)stunnel.org> Subject: [stunnel-users] cross compiling stunnel-4.21 for ARM _______________________________________________ stunnel-users mailing list stunnel-users(a)stunnel.org https://www.stunnel.org/cgi-bin/mailman/listinfo/stunnel-users --------------------------------------------------------------------------------------------- Notice: This message has been scanned by Trend Micro Mail Security scanner and is believed to be clean --------------------------------------------------------------------------------------------- ************************************************************************************************************************************************************* eInfochips Business Disclaimer : This e-mail message and all attachments transmitted with it are intended solely for the use of the addressee and may contain legally privileged and confidential information. If the reader of this message is not the intended recipient, or an employee or agent responsible for delivering this message to the intended recipient, you are hereby notified that any dissemination, distribution, copying, or other use of this message or its attachments is strictly prohibited. If you have received this message in error, please notify the sender immediately by replying to this message and please delete it from your computer. Any views expressed in this message are those of the individual sender unless otherwise stated. Company has taken enough precautions to prevent the spread of viruses. However the company accepts no liability for any damage caused by any virus transmitted by this email. ************************************************************************************************************************************************************* --------------------------------------------------------------------------------------------- Notice: This message has been scanned by Trend Micro Mail Security scanner and is believed to be clean ---------------------------------------------------------------------------------------------

1 0

cross compiling stunnel-4.21 for ARM
by Krinali Shah - PES 03 Feb '14

03 Feb '14

----- Forwarded Message ----- From: "Krinali Shah - PES" <krinali.shah(a)einfochips.com> To: stunnel-users(a)stunnel.org Sent: Monday, February 3, 2014 3:04:44 PM Subject: cross compiling stunnel-4.21 for ARM Hi All, I have thttpd server cross-compiled for my ARM based embedded board. Now I want to add the support for https services on my board, so I think of using stunnel with openssl. I have already download source code of openssl and cross compiled it, for linux-arm. I have downloaded stunnel-4.21 and followed the steps as mentioned below. 1. create stunnel.pem file inside /etc/ssl/certs/stunnel.pem 2. create stunnel.conf file inside /etc/stunnel/stunnel.conf with following parameters. cert = /etc/ssl/certs/stunnel.pem key = /etc/ssl/certs/stunnel.pem chroot = /var/run/stunnel setuid = stunnel4 setgid = stunnel4 debug = 7 pid = /stunnel.pid setuid = stunnel setgid = stunnel socket = l:TCP_NODELAY=1 socket = r:TCP_NODELAY=1 compression = rle output = /var/log/stunnel4/stunnel.log client = no [https] accept = 10.103.2.104:443 connect = 127.0.0.1:8080 TIMEOUTclose = 0 2. ./configure --prefix=/home/stunnel --host=arm-linux --enable-shared --with-ssl=/home 3. changed CC, RANLIB and STRIP environment variables for cross compilation in Makefile. 4. make 5. sudo make install The cross-compiled binary stunnel is installed. When I run the binary on board, it does not show any error. Following debug messages are seen on screen. 1969.12.31 21:19:54 LOG6[1154:1073842296]: Compression enabled using rle method 1969.12.31 21:19:54 LOG7[1154:1073842296]: RAND_status claims sufficient entropG 1969.12.31 21:19:54 LOG7[1154:1073842296]: PRNG seeded successfully 1969.12.31 21:19:54 LOG7[1154:1073842296]: Certificate: /etc/ssl/certs/stunnel.m 1969.12.31 21:19:54 LOG7[1154:1073842296]: Certificate loaded 1969.12.31 21:19:54 LOG7[1154:1073842296]: Key file: /etc/ssl/certs/stunnel.pem 1969.12.31 21:19:54 LOG7[1154:1073842296]: Private key loaded 1969.12.31 21:19:54 LOG7[1154:1073842296]: SSL context initialized for service s But, If I try to request https service from web browser (Firefox) ie, https://server_ip it gives me error. Meaning https server is not started correctly, still something is missing. Please guide me if you have any clues. Any help would be highly appreciated. Thanks, Krinali Shah ************************************************************************************************************************************************************* eInfochips Business Disclaimer : This e-mail message and all attachments transmitted with it are intended solely for the use of the addressee and may contain legally privileged and confidential information. If the reader of this message is not the intended recipient, or an employee or agent responsible for delivering this message to the intended recipient, you are hereby notified that any dissemination, distribution, copying, or other use of this message or its attachments is strictly prohibited. If you have received this message in error, please notify the sender immediately by replying to this message and please delete it from your computer. Any views expressed in this message are those of the individual sender unless otherwise stated. Company has taken enough precautions to prevent the spread of viruses. However the company accepts no liability for any damage caused by any virus transmitted by this email. ************************************************************************************************************************************************************* --------------------------------------------------------------------------------------------- Notice: This message has been scanned by Trend Micro Mail Security scanner and is believed to be clean ---------------------------------------------------------------------------------------------

2 1

Connect to Outlook.com SMTP with stunnel
by Tenhult Server 30 Jan '14

30 Jan '14

Hi, i'm trying to send mail with the help of stunnel but i get STARTTLS expected, what is wrong with my setup? File: stunnel.conf [outlook-smtp] protocol = smtp accept = 127.0.0.1:25 connect = smtp-mail.outlook.com:587 Log 2014.01.26 13:59:03 LOG5[1536]: stunnel 5.00 on x86-pc-msvc-1500 platform 2014.01.26 13:59:03 LOG5[1536]: Compiled/running with OpenSSL 1.0.1e-fips 11 Feb 2013 ... ... 2014.01.26 13:59:16 LOG6[2428]: Server-mode smtp protocol negotiations started 2014.01.26 13:59:16 LOG7[2428]: RFC 2487 detected 2014.01.26 13:59:16 LOG7[2428]: <- 220 BLU0-SMTP180.phx.gbl Microsoft ESMTP MAIL Service, Version: 6.0.3790.4675 ready at Sun, 26 Jan 2014 04:59:07 -0800 2014.01.26 13:59:16 LOG7[2428]: -> 220 BLU0-SMTP180.phx.gbl Microsoft ESMTP MAIL Service, Version: 6.0.3790.4675 ready at Sun, 26 Jan 2014 04:59:07 -0800 + stunnel 2014.01.26 13:59:16 LOG7[2428]: <- EHLO Fredrik-Laptop 2014.01.26 13:59:16 LOG7[2428]: -> 250-EHLO Fredrik-Laptop Welcome 2014.01.26 13:59:16 LOG7[2428]: -> 250 STARTTLS 2014.01.26 13:59:16 LOG7[2428]: <- MAIL FROM: <mymail(a)live.com> 2014.01.26 13:59:16 LOG3[2428]: STARTTLS expected 2014.01.26 13:59:16 LOG5[2428]: Connection reset: 0 byte(s) sent to SSL, 0 byte(s) sent to socket 2014.01.26 13:59:16 LOG7[2428]: Remote socket (FD=520) closed 2014.01.26 13:59:16 LOG7[2428]: Local socket (FD=540) closed 2014.01.26 13:59:16 LOG7[2428]: Service [outlook-smtp] finished (0 left) Fredrik

2 1

Specifying a username and password
by Allen Crist 30 Jan '14

30 Jan '14

I have a scanner that only has an smtp address and port #. There is no option to specify a username and password. Is there a way to configure STunnel to assist with this? Regards, Allen -- Allen Crist, Owner A+ | Network+ | Security+ | MCITP/MCSA: Windows Server 2008 *CCW Technology Computer Repair*Serving Home & Small Business Customers since 2008 (801)410-0203 http://www.ccwtech.com http://www.facebook.com/CCWTechnology

1 0

Filename is not cached for later editing
by Javier 24 Jan '14

24 Jan '14

Hi, Scenario in Windows. I found today that, when you specify a configuration file different from the standard file name, you can't edit it through "Configuration>Edit stunnel.conf". Stunnel tries to edit stunnel.conf, and, if not found, creates a new one through notepad. This doesn't affect to the reload function, where the configuration file specified is used for reload. Also, this is not important, because in most cases is used the default file name, but maybe could be implemented the ability to change those menu options to display the current configuration file name used instead the standard. Let's say we use a configuration file named xxx.conf. The menu may change to "Edit xxx.conf" and "Reload xxx.conf" instead "Edit stunnel.conf" and "Reload stunnel.conf". This may be interesting for when we have several services installed and identify them better. Regards.

4 9

Additional certificate (like openssl s_server -dkey/-dcert)
by Lapo Luchini 24 Jan '14

24 Jan '14

Is it possible to configure STunnel to support "additional" certificate like OpenSSL s_Server's -dkey/-dcert parameters, in order to support ECDSA in addition to RSA on the same connection? -- Lapo Luchini - http://lapo.it/ “Two can keep a secret if one is dead.” (anonymous)

2 1

SSL communication is unestablishable by stunnel.
by take＠kasaneiro.jp 24 Jan '14

24 Jan '14

stunnel is used in order to use SMTPs/POPs, when using the e-mail software Mew. However, the following logs come out, emacs solidifies and communication is impossible. How is it repaired if it carries out? Please let me know if you please. Computer environment Apple MacBook Pro (Mid 2012), Mac OS X 10.9.2 GNU (Cocoa)Emacs 24.3.50.1 (x86_64-apple-darwin13.0.0, NS apple-appkit- 1265.00) Mew 6.5 Stunnel 4.56 --- <SSL/TLS: > 2014.01.23 23:30:26 LOG7[15311:140735163843344]: Clients allowed=125 2014.01.23 23:30:26 LOG5[15311:140735163843344]: stunnel 4.56 on x86_64- apple-darwin13.0.0 platform 2014.01.23 23:30:26 LOG5[15311:140735163843344]: Compiled/running with OpenSSL 0.9.8y 5 Feb 2013 2014.01.23 23:30:26 LOG5[15311:140735163843344]: Threading:PTHREAD Sockets:SELECT,IPv6 SSL:ENGINE,OCSP 2014.01.23 23:30:26 LOG5[15311:140735163843344]: Reading configuration from file /var/folders/tc/0dm70kl977x3_rcfkldrzz3h0000gn/T/take15307AeS/ mew1530708i 2014.01.23 23:30:26 LOG7[15311:140735163843344]: Compression not enabled 2014.01.23 23:30:26 LOG7[15311:140735163843344]: PRNG seeded successfully 2014.01.23 23:30:26 LOG6[15311:140735163843344]: Initializing service [ 8840] 2014.01.23 23:30:26 LOG7[15311:140735163843344]: Verify directory set to /Users/take/.certs 2014.01.23 23:30:26 LOG7[15311:140735163843344]: Added /Users/take/. certs revocation lookup directory 2014.01.23 23:30:26 LOG7[15311:140735163843344]: SSL options set: 0x00000004 2014. <SSL/TLS: > 01.23 23:30:26 LOG5[15311:140735163843344]: Configuration successful 2014.01.23 23:30:26 LOG7[15311:140735163843344]: Service [8840] (FD=7) bound to 127.0.0.1:8840 2014.01.23 23:30:26 LOG7[15311:140735163843344]: No pid file being created <SSL/TLS: > 2014.01.23 23:30:26 LOG7[15311:140735163843344]: Service [8840] accepted (FD=3) from 127.0.0.1:56364 2014.01.23 23:30:26 LOG7[15311:4558856192]: Service [8840] started 2014.01.23 23:30:26 LOG5[15311:4558856192]: Service [8840] accepted connection from 127.0.0.1:56364 2014.01.23 23:30:26 LOG6[15311:4558856192]: connect_blocking: connecting 127.0.0.1:99 2014.01.23 23:30:26 LOG7[15311:4558856192]: connect_blocking: s_poll_ wait 127.0.0.1:995: waiting 10 seconds 2014.01.23 23:30:26 LOG3[15311:4558856192]: connect_blocking: connect 127.0.0.1:995: Connection refused (61) 2014.01.23 23:30:26 LOG5[15311:4558856192]: Connection reset: 0 byte(s) sent to SSL, 0 byte(s) sent to socket 2014.01.23 23:30:26 LOG7[15311:4558856192]: Local socket (FD=3) closed 2014.01.23 23:30:26 LOG7[15311:4558856192]: Service [8840] finished (0 left)

2 1

OCSP Responders in AIA extension
by Ender Erel 22 Jan '14

22 Jan '14

Hi All, Does stunnel check the OCSP responders found in a certificate's AIA field? I am asking this because in the following e-mail from back 2008, the sender mentions a patch that implements this functionality. The patch is included with the mail but I don't think it is included in the later versions of stunnel. Does this mean OCSP responders inside a certificate are ignored? I also want to ask another thing. When using verify = 3 in client mode, which file is used to check the received certificate? Is it the CAfile? If so, would it work like this: - I manually opened a connection to a server outside stunnel, downloaded the server's certificate, and closed the connection. - I saved this certificate to a file, and wrote the path of this file in the stunnel configuration file (CAfile = /mycerts/tmpcert.pem,verify=3). - I started stunnel and initiated a connection to the server. Would the connection be successful? Would it be the right way to use verify=3? Kind Regards, Ender Erel

2 3

disabling compression
by James Bardin 22 Jan '14

22 Jan '14

Hi, The stunnel man page states that compression is off by default, but It seems that is no longer the case. (the changelog states that version 4.5.1 sets compression as "not disabled by default") The config options don't seem to accept any parameters to disable compression. Is there any way to disable it via openssl options? Thanks! -jim

2 2

Question about 'delay = yes' and DNS cache
by John Chow 16 Jan '14

16 Jan '14

Hey Everyone, I have a question about the *delay = yes* config flag and whether or not it caches the resolved IP after the initial connection? To give context, I want my load balancer (Haproxy) to forward requests to an app on Heroku, and I'm using stunnel on my LB box to proxy to Heroku via HTTPS. Since the IP for my app's endpoint could potentially change (60s DNS TTL), stunnel caching resolved IPs would be a problem. Thanks, John -- John Chow Software Engineer Fundly

2 1

Silent install on windows ?
by Brian Ipsen 16 Jan '14

16 Jan '14

Hi I have been searching through google, and from the result there, it should be possible to install stunnel silently on Windows using a /S switch.... I have tried this with the stunnel-4.56-installer.exe package - but it doesn't seem to work..... Can anyone tell me how to install stunnel silently - with no user interaction at all ? Regards /Brian

2 1

Multiple OCPSs
by Ender Erel 16 Jan '14

16 Jan '14

Hi All, We want to use multiple OCSP servers, but the way I see it we can specify only one OCSP server in the configuration file. Is there any other way to do this? Regards, Ender

2 1

Extra listeneres running that loop back to each other.
by Keith Knapp 15 Jan '14

15 Jan '14

Hi, Every time I start stunnel two unexplainable things happen. 1. The settings in my .conf file are not implemented and I have checked them syntactically. 2. I use TCPView and can see two established connections associated with the stunnel process, but they are *not* in my .conf file - Every time I restart the service the two connections reappear but are associated with different ports. - Furthermore the connections loop back on each other; meaning that the remote port of the one connection is the local port of the other connection (and vice-versa). - Are these supposed to be there? I have done a fresh install of the newest version of stunnel. Keith

1 0

Re: connect error 0 running on ARM platform
by FX35 15 Jan '14

15 Jan '14

> Message: 1 > Date: Tue, 14 Jan 2014 12:19:47 +0100 > From: Michal Trojnara <Michal.Trojnara(a)mirt.net> > To: stunnel-users(a)stunnel.org > Subject: [stunnel-users] Fwd: Re: connect error 0 running on ARM > platform > Message-ID: <52D51D53.5030106(a)mirt.net> > Content-Type: text/plain; charset=ISO-8859-1; format=flowed > > FWX wrote: >> errno is not updated ... >> >> So errno doen't reflect the real value. >> >> Map file of stunnel programm shows _errno_localion(), as you wrote. >> >> Perhaps is there a bug in uClib ? > > Something like this one: > http://www.mail-archive.com/uclibc@uclibc.org/msg05640.html > http://www.mail-archive.com/uclibc@uclibc.org/msg05641.html > or: > http://www.mail-archive.com/uclibc@uclibc.org/msg09301.html > ? > > It indeed looks like uclibc and stunnel use a different errno... > > Mike > > Thank you, Mike, I think you're right. It's ok using mode fork rather than pthread. Regards, FWX.

1 0

newbie question
by Ted Roeloffzen 15 Jan '14

15 Jan '14

Hello All, I'm new to STunnel and installed and setup STunnel. When someone tried to connect I get the following items in the log. SSL accepted: new session negotiated Negotiated ciphers: AES256-SHA SSLv3 Kx=RSA Au=RSA Enc=AES(256) Mac=SHA1 FD 8 in non-blocking mode SL-test>Instelling connecting 127.0.0.1:8890 connect_wait: waiting 10 seconds connect_wait: connected Remote FD=8 initialized SSL alert (read): warning: close notify SSL closed on SSL_read Socket write shutdown SSL write shutdown SSL alert (write): warning: close notify SSL_shutdown successfully sent close_notify Connection closed: 0 bytes sent to SSL, 0 bytes sent to socket SL-test>Instelling finished (0 left) As I'm reading this, there was an established connection but the connection party disconnected, for some reason or another. There was no data sent, but there also was no real error. Is this assumption correct or am I missing something? kind regards, Ted

1 0

Re: [stunnel-users] connect error 0 running on ARM platform
by FX35 14 Jan '14

14 Jan '14

> Message: 3 > Date: Fri, 10 Jan 2014 15:27:10 +0100 > From: Michal Trojnara <Michal.Trojnara(a)mirt.net> > To: stunnel-users(a)stunnel.org > Subject: Re: [stunnel-users] connect error 0 running on ARM platform > Message-ID: <52D0033E.1060109(a)mirt.net> > Content-Type: text/plain; charset="iso-8859-1"; Format="flowed" > > On 01/09/2014 06:02 PM, FX35 wrote: >> Running stunnel 4.56 or 5.00 on an ARM platform (ARM926EJ) with Linux >> 2.6.36.4, I encounter the following error : the call to connect() >> return -1, but errno is set to 0 ! >> >> If stunnel is configured to use fork mode instead of pthread mode, >> the problem disapear. >> >> So it seems there is a problem, cross-compiling the program, with >> errno or __errno_location() in the program generated with pthread. >> >> I add the definition of _REENTRANT, without success ... >> >> (See $H1 at http://pauillac.inria.fr/~xleroy/linuxthreads/faq.html) >> >> Is somebody meet the same error ? > > The errno definition in the Android framework (as an example of > Linux/ARM platform) is: > > /* internal function returning the address of the thread-specific > errno */ > extern volatile int* __errno(void); > > /* a macro expanding to the errno l-value */ > #define errno (*__errno()) > > > It seems okay. > > How do you reproduce this problem? What are the stunnel debug logs when > it happens? > > Mike Hello Mike, It seems that the errno variable is not correcly set/updated in C library, using pthread mode. Sample: errno = -1; ret = connect(...); if( ret == -1 ) { printf("errno=%d\n",errno); } will displays value -1 for errno, not EINPROGRESS or EWOULDBLOCK ! errno is not updated ... So errno doen't reflect the real value. Map file of stunnel programm shows _errno_localion(), as you wrote. Perhaps is there a bug in uClib ? Here is the result of ldd command: # ldd stunnel libssl.so.1.0.0 => /usr/lib/libssl.so.1.0.0 (0x400f3000) libcrypto.so.1.0.0 => /usr/lib/libcrypto.so.1.0.0 (0x4013d000) libz.so.1 => /usr/lib/libz.so.1 (0x4027c000) libdl.so.0 => /lib/libdl.so.0 (0x4029b000) libutil.so.0 => /lib/libutil.so.0 (0x4009e000) libpthread.so.0 => /lib/libpthread.so.0 (0x400a7000) libc.so.0 => /lib/libc.so.0 (0x402a6000) libgcc_s.so.1 => /lib/libgcc_s.so.1 (0x400c6000) ld-uClibc.so.0 => /lib/ld-uClibc.so.0 (0x4008f000) Thanks for help. Regards, FWX.

2 1

connect error 0 running on ARM platform
by FX35 10 Jan '14

10 Jan '14

Hello, Running stunnel 4.56 or 5.00 on an ARM platform (ARM926EJ) with Linux 2.6.36.4, I encounter the following error : the call to connect() return -1, but errno is set to 0 ! If stunnel is configured to use fork mode instead of pthread mode, the problem disapear. So it seems there is a problem, cross-compiling the program, with errno or __errno_location() in the program generated with pthread. I add the definition of _REENTRANT, without success ... (See $H1 at http://pauillac.inria.fr/~xleroy/linuxthreads/faq.html) Is somebody meet the same error ? Thanks for help. FWX.

2 1

What checks are made for verify=2
by Ender Erel 10 Jan '14

10 Jan '14

Hi All, I have been searching the web for information on what checks are made for verify=2 but I can't find any detailed information. What exactly goes on when I use verify=2 in client mode? Does stunnel only check if the certificate is signed by a valid CA? Or are any other X.509 attributes checked? Does it disallow settings like "CA=true"? I would really appreciate it if someone could point me where I can find about details of various verify levels. Thanks, Ender Erel

1 0

Stunnel cuts off message
by bernabei＠infinito.it 09 Jan '14

09 Jan '14

Hi,     I'd like to know why Stunnel cuts off messages. I use stunnel both the client and server side,the problem is that my client receives only a cutted off responce from the server,whose size turns out to be 18 KB. Hope an answer Thanks Chiara Bernabei

2 1

Error starting STunnel
by Ted Roeloffzen 09 Jan '14

09 Jan '14

Hi All, I've installed and configured my STunnel. But it won't start. The error i'm getting is: PEM_read_bio:no start line I use the certificate isn't valid, but it's a certificate that i received from a third party and should be correct. Do i have to add something to or alter the certificate so that STUnnel can work with it? kind regards, Ted

2 1

Stunnel should allow TLS v1.1, 1.2 in fips mode
by Douglas Harris (M) 07 Jan '14

07 Jan '14

Currently, stunnel only allows "sslVersion = TLSv1" when "fips = yes". TLSv1.1 and TLSv1.2 should also be permissible values for sslVersion in fips mode. -Doug

2 1

Invitation to connect on LinkedIn
by Manjula Hettiarachchi 30 Dec '13

30 Dec '13

LinkedIn ------------ stunnel, I'd like to add you to my professional network on LinkedIn. - Manjula Manjula Hettiarachchi CTO at UGEN Sri Lanka Confirm that you know Manjula Hettiarachchi: https://www.linkedin.com/e/7575ev-hptlhkon-2z/isd/18944228150/nRr0DNUW/?hs=… -- You are receiving Invitation to Connect emails. Click to unsubscribe: http://www.linkedin.com/e/7575ev-hptlhkon-2z/vyS7IfxEDIThLYYA4jSpNuY0D7kTJI… (c) 2012 LinkedIn Corporation. 2029 Stierlin Ct, Mountain View, CA 94043, USA.

1 0

After upgrading OpenSSL, stunnel times out trying to receive emails
by James Brown 23 Dec '13

23 Dec '13

I've upgraded the OpenSSL on my test mail server, and recompiled Stunnel. Now when Stunnel receives an email it gets stuck on the "SSL state (accept): before/accept initialization" step and times out after a few minutes. Log: 2013.12.24 10:42:58 LOG7[86137:140735299320160]: Service [ssmtp] accepted (FD=3) from 192.168.1.10:54839 2013.12.24 10:42:58 LOG7[86137:4392841216]: Service [ssmtp] started 2013.12.24 10:42:58 LOG7[86137:4392841216]: Waiting for a libwrap process 2013.12.24 10:42:58 LOG7[86137:4392841216]: Acquired libwrap process #1 2013.12.24 10:42:58 LOG7[86137:4392841216]: Releasing libwrap process #1 2013.12.24 10:42:58 LOG7[86137:4392841216]: Released libwrap process #1 2013.12.24 10:42:58 LOG7[86137:4392841216]: Service [ssmtp] permitted by libwrap from 192.168.1.10:54839 2013.12.24 10:42:58 LOG5[86137:4392841216]: Service [ssmtp] accepted connection from 192.168.1.10:54839 2013.12.24 10:42:58 LOG7[86137:4392841216]: SSL state (accept): before/accept initialization 2013.12.24 10:42:58 LOG7[86137:4392841216]: SNI: no virtual services defined 2013.12.24 10:42:58 LOG7[86137:4392841216]: SSL state (accept): SSLv3 read client hello A 2013.12.24 10:42:58 LOG7[86137:4392841216]: SSL state (accept): SSLv3 write server hello A 2013.12.24 10:42:58 LOG7[86137:4392841216]: SSL state (accept): SSLv3 write certificate A 2013.12.24 10:42:58 LOG7[86137:4392841216]: SSL state (accept): SSLv3 write key exchange A 2013.12.24 10:42:58 LOG7[86137:4392841216]: SSL state (accept): SSLv3 write server done A 2013.12.24 10:42:58 LOG7[86137:4392841216]: SSL state (accept): SSLv3 flush data 2013.12.24 10:42:58 LOG3[86137:4392841216]: SSL_accept: Peer suddenly disconnected 2013.12.24 10:42:58 LOG5[86137:4392841216]: Connection reset: 0 byte(s) sent to SSL, 0 byte(s) sent to socket 2013.12.24 10:42:58 LOG7[86137:4392841216]: Local socket (FD=3) closed 2013.12.24 10:42:58 LOG7[86137:4392841216]: Service [ssmtp] finished (0 left) 2013.12.24 10:42:58 LOG7[86137:140735299320160]: Service [ssmtp] accepted (FD=3) from 192.168.1.10:54840 2013.12.24 10:42:58 LOG7[86137:4392841216]: Service [ssmtp] started 2013.12.24 10:42:58 LOG7[86137:4392841216]: Waiting for a libwrap process 2013.12.24 10:42:58 LOG7[86137:4392841216]: Acquired libwrap process #1 2013.12.24 10:42:58 LOG7[86137:4392841216]: Releasing libwrap process #1 2013.12.24 10:42:58 LOG7[86137:4392841216]: Released libwrap process #1 2013.12.24 10:42:58 LOG7[86137:4392841216]: Service [ssmtp] permitted by libwrap from 192.168.1.10:54840 2013.12.24 10:42:58 LOG5[86137:4392841216]: Service [ssmtp] accepted connection from 192.168.1.10:54840 2013.12.24 10:42:58 LOG7[86137:4392841216]: SSL state (accept): before/accept initialization 2013.12.24 10:47:58 LOG6[86137:4392841216]: init_ssl: s_poll_wait: TIMEOUTbusy exceeded: sending reset 2013.12.24 10:47:58 LOG5[86137:4392841216]: Connection reset: 0 byte(s) sent to SSL, 0 byte(s) sent to socket 2013.12.24 10:47:58 LOG7[86137:4392841216]: Local socket (FD=3) closed 2013.12.24 10:47:58 LOG7[86137:4392841216]: Service [ssmtp] finished (0 left) Any suggestions? It was working fine before I upgraded OpenSSL to 1.00e. System is a Mac OS X 10.7.5 box. Thanks, James.

1 0

Error on attempt to launch Stunnel
by Tracy Drake - QI-C 20 Dec '13

20 Dec '13

Hello! I wonder if you can offer insight as to the significance of the following error on attempt to launch the new 4.56 Stunnel... [image: Inline image 1] Perhaps it was simply a botched/incomplete installation but I wanted to reach out before just attempting a reinstall. Thanks in advance! -- Tracy Drake CSM Senior Consultant GSA-FAS FAME Contractor URSA & INFOConnect Support & Training Team Lead 704-987-1211 tracy.drake(a)gsa.gov

2 1

Stunnel client cuts off the responce of the server
by bernabei＠infinito.it 19 Dec '13

19 Dec '13

Hi,  I use stunnel both the client and server side, but I have problem with server responces because my client app receive only a cut off responce from the server,whose size turns out to be 18 KB. I'd like to know if the BUFFSIZE constant is the maximum size of the message that a client can read.  What if the server sends a message that is bigger than the buffer size? the remaining byte are ignored? if so, how can I do?   Waiting for an answer Thanks in advance Chiara Bernabei

1 0

Reload configuration file in Windows service
by David O'Riva 17 Dec '13

17 Dec '13

Hi, Is there a command line method for instructing stunnel to reload its configuration file when running as a Windows service? I'm trying to use stunnel to replace MySQL's abysmal SSL support on a box that has no GUI interface at all (it will never be logged into interactively). I've poked through the source, and on Windows it looks like the only way to pass signals to it is through a private pipe that is created by and for the stunnel process. Also, does anyone know offhand if existing connections are left unmolested when a configuration reload happens? For production use, I really need to be able to update certs and add and remove components (stunnel services, I guess) without disturbing connections that are in progress. Thanks! -Dave

1 0

Re: [stunnel-users] stunnel and Pegasus Mail
by sawbona＠flashmail.com 16 Dec '13

16 Dec '13

Hello: Thanks to all for your input. Much appreciated. On 15 Dec 2013 at 11:03, you wrote: To: sawbona(a)flashmail.com, Subject: Re: [stunnel-users] stunnel and Pegasus Mail > Just an added note. You need to restart the stunnel ... Yes. I was aware of that. > ... load it as part of the startup process. I have installed it to run as a service so that's what it does. > I would assume you are using windows ... Yes. =-/ > ... so would have to use the task manager to end the task ... Not needed. I have a taskbar icon that on left-click brings up a menu which, among other options, has one to edit and another one to reload the *.conf file. > You need to use a different set of ports for the gmx setup. That did it. =-) I have changed the configuration and it's working perfectly. I did not see the need to do this (maybe not read the manual often enough) but as the log file did not indicate any problems ... LOG5[1796:1960]: Reading configuration from file stunnel.conf LOG5[1796:1960]: FIPS mode is enabled LOG5[1796:1960]: Configuration successful ... I guessed it was something more complex. It would be nice if stunnel had the capability of showing (via the log file) an essential configuration mistake such as two POP3, SMTP or IMAP servers listening on the same ports. Once again, thanks for your input. Cheers, CIV PD: I am able to download mail from gmx.net serves via POP3 using Pegasus Mail and stunnel with no problems whatsoever. Sending mail requires the use of the POP3 userID/PW.

1 0

stunnel and Calypso and GMX: Anyone out there where stunnel works with Calypso?
by greeksalad 16 Dec '13

16 Dec '13

Hallo Everybody! Thanks for 2 replies, which replied, that mail.gmx.net:465 is not a propper ssl server: well, i tried with another email client (Opera), sending AUTH PLAIN and AUTH LOGIN and both worked. So I tried all possible configs in Calypso to get a successful smtp login, but it fails everytime with the same err.msg(see below) The funny thing is, the getting mail, login pop.gmx.net:995 works perfect via stunnel, but smtp fails.... So I want to ask, if there is anyone out there, who works successully with CALYPSO, stunnel and GMX-Provider?? In case, please tell me your settings - would be great! Thanks Johann my last question: ------ trying hard to get stunnel worked with Calypso email client! When I only check emails, it works via stunnel at ssl port 995. But sending email fails with following message from Calypso: *** Sending pending mail from account xyz(a)gmx.net' @ 13.12.2013 01:54 *** Connecting to: '127.0.0.1' -> Successful Logging into the SMTP server as: "xxx" The server does not support any secure password authentication providers Disconnecting -> Successful Failed to send one or more pending messages. Smtp.c[287] Smtp.dll the config file via stunnel looks so: cert = stunnel.pem [gmx-pop3] client = yes accept = 127.0.0.1:108 connect = pop.gmx.net:995 [gmx-smtp] client = yes accept = 127.0.0.1:107 connect = mail.gmx.net:465 the mailserver- config of Calypso is so: pop3: 127.0.0.1 port 108 smtp: 127.0.0.1 port 107 smtp authentication method: user pop account.... So, I am really out of ideas to get the very best email client of the world - CALYPSO - running to send emails via ssl connection, wich my provider forces me to send via ssl from 1.jan.2014... Anyone can help? thanks allot! johann

3 2

stunnel and Pegasus Mail
by sawbona＠flashmail.com 15 Dec '13

15 Dec '13

Hello: I recently came across stunnel as a solution (THE solution) to Pegasus Mail 4.63 having some sort of incompatibility with SSL versions in use at gmx.de and xsmail.com mail services. As I was absolutely unwilling to let go of my trusty PMailo, stunnel proved to be a godsend. =-) At first the problem was with xsmail only and after setting up stunnel everything went along perfectly well, no problems whatsoever. Now, gmx.de is enforcing the use of SSL on ports 993, 995 and 465 instead of 110, 25 and 143 so I edited my stunnel.conf accordingly. --- ;*********************************************************************** ;Configured service ;*********************************************************************** ;Pegasus Mail ;SSL connections to XSMail's servers ;Reason: there's some incompat between PMail 4.63 and SSL - 01/11/2013 [xsmail-POP3-SSL] client = yes accept = 10995 connect = mail.messagingengine.com:995 [xsmail-smtp-SSL] client = yes accept = 10465 connect = mail.messagingengine.com:465 [xsmail-IMAP-SSL] client = yes accept = 10993 connect = mail.messagingengine.com:993 ;Pegasus Mail ;SSL connections to GMX's servers ;Reason: there's some incompat between PMail 4.63 and SSL - 01/11/2013 [gmx-POP3-SSL] client = yes accept = 10995 connect = pop.gmx.net:995 [gmx-smtp-SSL] client = yes accept = 10465 connect = mail.gmx.net:465 [gmx-IMAP-SSL] client = yes accept = 10993 connect = imap.gmx.net:993 --- The issue at hand is that stunnel in not working properly now. This is the log file for a successful connection to xsmail: --- 2013.12.14 17:15:08 LOG5[500:284]: Service [xsmail-POP3-SSL] accepted connection from 127.0.0.1:1182 2013.12.14 17:15:08 LOG5[500:284]: connect_blocking: connected 66.111.4.51:995 2013.12.14 17:15:08 LOG5[500:284]: Service [xsmail-POP3-SSL] connected remote server from 192.168.1.102:1183 2013.12.14 17:15:10 LOG5[500:284]: Connection closed: 58 byte(s) sent to SSL, 112 byte(s) sent to socket --- And this is the log file for a (failed) connection to gmx: --- 2013.12.14 17:17:15 LOG5[500:452]: Service [xsmail-POP3-SSL] accepted connection from 127.0.0.1:1184 2013.12.14 17:17:15 LOG5[500:452]: connect_blocking: connected 66.111.4.52:995 2013.12.14 17:17:15 LOG5[500:452]: Service [xsmail-POP3-SSL] connected remote server from 192.168.1.102:1185 2013.12.14 17:17:21 LOG5[500:452]: Connection closed: 36 byte(s) sent to SSL, 126 byte(s) sent to socket --- The PMail trace is this as follows: [*] Connection established to 127.0.0.1 >> 0016 +OK POP3 ready << 0015 USER 14067985 >> 0005 +OK << 0015 PASS XXXXXXXX >> 0083 -ERR You must use your full username of the form yourusername(a)domain.tld to login Figures ... It is attempting to connect to gmx with xsmail credentials. As youcan see, for some strange reason it is connecting to gmx with xsmail settings. Must be a *.conf file problem but I am at a loss as to what is gong on Any ideas? Thanks in advance, CIV

2 2

stunnel and Calypso: pop3 works, smtp error!
by greeksalad 13 Dec '13

13 Dec '13

Hallo Everybody! trying hard to get stunnel worked with Calypso email client! When I only check emails, it works via stunnel at ssl port 995. But sending email fails with following message from Calypso: *** Sending pending mail from account xyz(a)gmx.net' @ 13.12.2013 01:54 *** Connecting to: '127.0.0.1' -> Successful Logging into the SMTP server as: "xxx" The server does not support any secure password authentication providers Disconnecting -> Successful Failed to send one or more pending messages. Smtp.c[287] Smtp.dll the config file via stunnel looks so: cert = stunnel.pem [gmx-pop3] client = yes accept = 127.0.0.1:108 connect = pop.gmx.net:995 [gmx-smtp] client = yes accept = 127.0.0.1:107 connect = mail.gmx.net:465 the mailserver- config of Calypso is so: pop3: 127.0.0.1 port 108 smtp: 127.0.0.1 port 107 smtp authentication method: user pop account.... So, I am really out of ideas to get the very best email client of the world - CALYPSO - running to send emails via ssl connection, wich my provider forces me to send via ssl from 1.jan.2014... Anyone can help? thanks allot! johann

3 2

Client Authentication - Configuring Service Definition
by j nasty 10 Dec '13

10 Dec '13

Hello Everyone, I’m attempting to consume a web service that requires I authenticate the client using certificates. I was given a (.pfx) certificate locked with a password by the 3rd party vendor. I know I need to convert the current certificate I have into a (.pem) certificate, which I’ll use the openssl tools to accomplish this. I’m a bit new to SSL and network security, thus I’m not entirely sure if I should only be creating a client certificate from the original (.pfx) file or if a server certificate will also need to get created. I used the command: “pkcs12 –in certificate.pfx –out certificate.pem –nodes (–clcerts/-cacerts)” to create my pem certificate. Here is my current configuration: [SSLconnection] debug = 7 CAfile = certificate.pem client = yes verify = 2 accept = 127.0.0.1:9001 connect = web.service.com:443 And the log: (I obscured some information identity information) 2013.12.10 09:36:41 LOG5[9776:8488]: stunnel 4.56 on x86-pc-msvc-1500 platform 2013.12.10 09:36:41 LOG5[9776:8488]: Compiled/running with OpenSSL 1.0.1e-fips 11 Feb 2013 2013.12.10 09:36:41 LOG5[9776:8488]: Threading:WIN32 Sockets:SELECT,IPv6 SSL:ENGINE,OCSP,FIPS 2013.12.10 09:36:41 LOG5[9776:8488]: Reading configuration from file stunnel.conf 2013.12.10 09:36:41 LOG5[9776:8488]: FIPS mode is enabled 2013.12.10 09:36:41 LOG5[9776:8488]: Configuration successful 2013.12.10 09:36:44 LOG5[9776:9024]: Service [SSLconnection] accepted connection from 127.0.0.1:60659 2013.12.10 09:36:44 LOG5[9776:9024]: connect_blocking: connected web.service.com:443 2013.12.10 09:36:44 LOG5[9776:9024]: Service [SSLconnection] connected remote server from 192.168.50.211:60660 2013.12.10 09:36:44 LOG5[9776:9024]: Certificate accepted: depth=1, /C=US/O=Entrust, Inc./OU=www.entrust.net/rpa is incorporated by reference/OU=(c) 2009 Entrust, Inc./CN=Entrust Certification Authority - L1C 2013.12.10 09:36:44 LOG5[9776:9024]: Certificate accepted: depth=1, /C=US/O=Entrust, Inc./OU=www.entrust.net/rpa is incorporated by reference/OU=(c) 2009 Entrust, Inc./CN=Entrust Certification Authority - L1C 2013.12.10 09:36:44 LOG4[9776:9024]: CERT: Certificate not found in local repository 2013.12.10 09:36:44 LOG4[9776:9024]: Certificate check failed: depth=0, /C=US/ST=Texas/L=Austin/O=OName/CN=web.service.com 2013.12.10 09:36:44 LOG3[9776:9024]: SSL_connect: 14090086: error:14090086:SSL routines:SSL3_GET_SERVER_CERTIFICATE:certificate verify failed 2013.12.10 09:36:44 LOG5[9776:9024]: Connection reset: 0 byte(s) sent to SSL, 0 byte(s) sent to socket Looks like my problem is stemming from "Certificate not found in local repository"? Thank you in advance for any assistance, Jake

1 0

connect error 0 running on ARM platform
by FX35 10 Dec '13

10 Dec '13

Hello, Running stunnel 4?56 on an ARM platform (ARM926EJ) with Linux 2.6.36.4, I encounter the following error : the call to connect() return -1, but errno is set to 0 ! Is somebody meet the same error ? Is the problem in stunnel program ? An other application, using non blocking call to connect() run correctly. Thanks for help. FWX.

1 0

newbie - sTunnel examples and users archive searching
by Attila Horvath 10 Dec '13

10 Dec '13

All I'm new to sTunnel and tunneling in general. Have a couple of quick questions... [1] It's been *many* years since I've used or subscribed to mailman. Is there a way of searching the mail archives online for specific topics and/or keywords without downloading everything so previously asked questions aren't repeated ad nauseam? [2] I have a specific need which I believe sTunnel will solve but not sure how to go about it. I want to access a machine that is behind a restrictive firewall from outside the network to perform perform remote desktop control. The firewall permits HTTP, HTTPS protocols and some similar common protocols. However, I do not have access to the firewall server ergo have no control/say over which ports are blocked or forwarded. I have heard about HTTP hole punching via ssl and http-tunnel - eg: http://sebsauvage.net/punching/. It sounds like sTunnel is similar/identical. Can someone point me to specific examples on how to use sTunnel as well as any examples that might satisfy my need? Is proxy server necessary to accomplish this? To date I've been using Teamviewer to access/control my machine(s) in conjunction with things like AdVOR, TOR, or UltraSurf. While these are excellent applications and their free use are limited, I do not expect this will last forever. I prefer to use and trust 'open source' applications where/when I can. Much appreciated and thank you in advance. Attila

1 0

error invalid stunnel.conf - No limit of clients
by Christian Huber 09 Dec '13

09 Dec '13

Hi, I just installed stunnel for my email programm courier. I edited the stunnel.conf as followed but am unfortunatly becoming the message from stunnel: invalid stunnel.conf No limit detected for the number of clients stunnel 4.56 on x86-pc-msvc-1500 platform Compiled/running with OpenSSL 1.0.1e-fips 11 Feb 2013 Threading:WIN32 Sockets:SELECT,IPv6 SSL:ENGINE,OCSP,FIPS Reading configuration from file stunnel.conf FIPS_mode_set: 2D07808C: error:2D07808C:FIPS routines:FIPS_module_mode_set:unsupported platform Line 11: "[POP3 T-Online]": Failed to initialize SSL Server is down my stunnel.conf is as followed: # GLOBAL OPTIONS client = yes output = stunnel-log.txt debug=4 taskbar = yes # SERVICE-LEVEL OPTIONS [POP3 T-Online] accept = 127.0.0.1:108 connect = securepop.t-online.de:995 [SMTP T-Online] accept = 127.0.0.1:107 connect = securesmtp.t-online.de:587 [POP3 web.de] accept = 127.0.0.1:106 connect = pop3.web.de:995 [SMTP web.de] accept = 127.0.0.1:105 connect = smtp.web.de:587 [POP3 STRATO] accept = 127.0.0.1:104 connect = pop3.strato.de:995 [SMTP STRATO] accept = 127.0.0.1:103 connect = smtp.strato.de:465 [POP3 GMX ] accept = 127.0.0.1:102 connect = pop.gmx.net:995 [SMTP GMX ] accept = 127.0.0.1:101 connect = mail.gmx.net:465 ___________________ Would be nice if someone could tell me what is wrong! Greetings Christian Huber

3 3

t-online, web.de E-mail with Courier
by Christian Huber 08 Dec '13

08 Dec '13

Hi, stunnel is now working with the fips=no global option without error! My e-mail programm courier is working with the servers from strato and gmx! But with t-online it is not working at the moment! I can not login into the pop3 server! >From courier I get the message: Sendrecv.c[229] Pop3.dll recv() failed WINSOCK Error: Connection reset. (The mail server terminated the connection. With web.de I can login into the pop3 server and receive mails. But sending mails is not sucessfull! >From courier I get the message: Sendrecv.c[188] Smtp.dll recv(MSG_PEEK) failed WINSOCK Error: Connection reset. (The mail server terminated the connection. Would be nice if someone has a solution! My stunnel.conf: # GLOBAL OPTIONS client = yes fips=no output = stunnel-log.txt debug=4 taskbar = yes # SERVICE-LEVEL OPTIONS [POP3 T-Online] accept = 127.0.0.1:108 connect = securepop.t-online.de:995 [SMTP T-Online] accept = 127.0.0.1:107 connect = securesmtp.t-online.de:587 [POP3 web.de] accept = 127.0.0.1:106 connect = pop3.web.de:995 [SMTP web.de] accept = 127.0.0.1:105 connect = smtp.web.de:587 [POP3 STRATO] accept = 127.0.0.1:104 connect = pop3.strato.de:995 [SMTP STRATO] accept = 127.0.0.1:103 connect = smtp.strato.de:465 [POP3 GMX ] accept = 127.0.0.1:102 connect = pop.gmx.net:995 [SMTP GMX ] accept = 127.0.0.1:101 connect = mail.gmx.net:465

1 0

stunnel domain name resolution bug
by David Slachta 07 Dec '13

07 Dec '13

I'm new to the mailing lists so I hope it's the correct way to report a bug. There's an issue with resolving domain names. I'm connecting an stunnel client to a server that sits on a computer which IP address is dynamic. Therefore I'm using a dyndns for the IP address of the server. When the IP address of the server is changed, the stunnel client doesn't update the name resolution of the dyndns name and tries to connect to the old IP which is of course unsuccessful. This can be resolved only by exiting and starting stunnel client again when a new domain name resolution is made. Would it be possible to add a functionality to the stunnel that wouldn't cache the name resolution but try to resolve the domain names every time there's a connection request? I'm using a Windows OS for both server and client, not sure if that makes a difference. Thanks! David

2 1

Re: [stunnel-users] stunnel domain name resolution bug
by Brian Wilkins 06 Dec '13

06 Dec '13

Sent you traffic from Sept 19th from Trojnara. May be helpful On Dec 6, 2013 6:11 PM, "Brian Wilkins" <bwilkins(a)gmail.com> wrote: > See my forward > On Dec 6, 2013 5:53 PM, "David Slachta" <elpin(a)volny.cz> wrote: > >> I'm new to the mailing lists so I hope it's the correct way to report a >> bug. >> >> There's an issue with resolving domain names. I'm connecting an stunnel >> client to a server that sits on a computer which IP address is dynamic. >> Therefore I'm using a dyndns for the IP address of the server. When the IP >> address of the server is changed, the stunnel client doesn't update the >> name resolution of the dyndns name and tries to connect to the old IP which >> is of course unsuccessful. This can be resolved only by exiting and >> starting stunnel client again when a new domain name resolution is made. >> >> Would it be possible to add a functionality to the stunnel that wouldn't >> cache the name resolution but try to resolve the domain names every time >> there's a connection request? >> >> I'm using a Windows OS for both server and client, not sure if that makes >> a difference. >> >> Thanks! >> David >> >> _______________________________________________ >> stunnel-users mailing list >> stunnel-users(a)stunnel.org >> https://www.stunnel.org/cgi-bin/mailman/listinfo/stunnel-users >> >>

1 0

Hostname verification, support for, and patches
by fslama＠comcast.net 06 Dec '13

06 Dec '13

After scouring the net I've found several isolated discussions regarding stunnel hostname validation. And also some patches that seem to implement hostname validation: https://www.stunnel.org/pipermail/stunnel-users/2010-March/002613.html I have a requirement to have stunnel (4.56) validate client certificates and their identity by comparing the its CNAME against the source address. I recall reading one response (which I can't find at the moment) from Marzena Trojnara indicating that this feature won't be supported. If so, can you explain the rational? Are there sanctioned patches out there today? Regards, -Fred

4 3

setup stunnel problem
by edu.bit.es＠gmail.com 20 Nov '13

20 Nov '13

Hi everybody, I'm absolutely new in stunnel. I came around because of a post in the google forums about making Symantec System Recovery mail through smtp.gmail.com. Symantec is not capable of doing SSL/TLS so I need a solution like stunnel. But I've an issue: it doesn't seem to work :) I installed the program ok, and configured in the following way: cert=stunnel.pem socket = l:TCP_NODELAY=1 socket= r:TCP_NODELAY=1 [gmail-smtp] client=yes accept:127.0.0.1:25 connect= smtp.gamil.com:465 EOF The server is listening on port 127.0.0.1:25 but when I do a telnet to that port gives an error and doesn't seem to tunnel me to smtp.gmail.com. On the other hand, I configured outlook to use that tunnel but gives an error stating it can reach the smtp server. What am I doing wrong? Should I change the TLS version? Best regards and thanks in advance.

2 7

Stunnel with gmail not working on RHEL 6.4
by André Luís 17 Nov '13

17 Nov '13

Hello, I am trying to setup stunnel to send email using gmail smtp server trough Oracle Database. I first tested on my windows machine. I installed and configured stunnel and it worked fine.But now I tried to do the same on our server (RHEL 6.4) and it doesn't work. I can successfuly telnet the 25 port: [root@server1 stunnel]# telnet localhost 25Trying 127.0.0.1...Connected to localhost.Escape character is '^]'.220 mx.google.com ESMTP so2sm18740691pbc.5 - gsmtp When I send the email, i receive this error: SMTP permanent error: 534 5.7.14 54 ef10sm21262349pac.1 - gsmtp anyone have any idea? the stunnel.conf: pid = /stunnel.pidoutput = /var/log/stunnel.logcompression = zlibsslVersion = alloptions = NO_SSLv2debug = 7 [gmail-smtp]client = yesaccept = localhost:25connect = smtp.gmail.com:465 Here is the Stunnel log:2013.11.17 15:58:34 LOG7[23729:139952118699968]: gmail-smtp accepted FD=13 from 127.0.0.1:560892013.11.17 15:58:34 LOG7[23729:139952118695680]: gmail-smtp started2013.11.17 15:58:34 LOG7[23729:139952118695680]: FD 13 in non-blocking mode2013.11.17 15:58:34 LOG7[23729:139952118695680]: Waiting for a libwrap process2013.11.17 15:58:34 LOG7[23729:139952118695680]: Acquired libwrap process #02013.11.17 15:58:34 LOG7[23729:139952118695680]: Releasing libwrap process #02013.11.17 15:58:34 LOG7[23729:139952118695680]: Released libwrap process #02013.11.17 15:58:34 LOG7[23729:139952118695680]: gmail-smtp permitted by libwrap from 127.0.0.1:560892013.11.17 15:58:34 LOG5[23729:139952118695680]: gmail-smtp accepted connection from 127.0.0.1:560892013.11.17 15:58:34 LOG7[23729:139952118695680]: FD 14 in non-blocking mode2013.11.17 15:58:34 LOG6[23729:139952118695680]: connect_blocking: connecting 74.125.129.108:4652013.11.17 15:58:34 LOG7[23729:139952118695680]: connect_blocking: s_poll_wait 74.125.129.108:465: waiting 10 seconds2013.11.17 15:58:34 LOG5[23729:139952118695680]: connect_blocking: connected 74.125.129.108:4652013.11.17 15:58:34 LOG5[23729:139952118695680]: gmail-smtp connected remote server from 172.31.22.161:510672013.11.17 15:58:34 LOG7[23729:139952118695680]: Remote FD=14 initialized2013.11.17 15:58:34 LOG7[23729:139952118695680]: SSL state (connect): before/connect initialization2013.11.17 15:58:34 LOG7[23729:139952118695680]: SSL state (connect): SSLv2/v3 write client hello A2013.11.17 15:58:34 LOG7[23729:139952118695680]: SSL state (connect): SSLv3 read server hello A2013.11.17 15:58:34 LOG7[23729:139952118695680]: SSL state (connect): SSLv3 read server certificate A2013.11.17 15:58:34 LOG7[23729:139952118695680]: SSL state (connect): SSLv3 read server done A2013.11.17 15:58:34 LOG7[23729:139952118695680]: SSL state (connect): SSLv3 write client key exchange A2013.11.17 15:58:34 LOG7[23729:139952118695680]: SSL state (connect): SSLv3 write change cipher spec A2013.11.17 15:58:34 LOG7[23729:139952118695680]: SSL state (connect): SSLv3 write finished A2013.11.17 15:58:34 LOG7[23729:139952118695680]: SSL state (connect): SSLv3 flush data2013.11.17 15:58:34 LOG7[23729:139952118695680]: SSL state (connect): SSLv3 read server session ticket A2013.11.17 15:58:34 LOG7[23729:139952118695680]: SSL state (connect): SSLv3 read finished A2013.11.17 15:58:34 LOG7[23729:139952118695680]: 1 items in the session cache2013.11.17 15:58:34 LOG7[23729:139952118695680]: 1 client connects (SSL_connect())2013.11.17 15:58:34 LOG7[23729:139952118695680]: 1 client connects that finished2013.11.17 15:58:34 LOG7[23729:139952118695680]: 0 client renegotiations requested2013.11.17 15:58:34 LOG7[23729:139952118695680]: 0 server connects (SSL_accept())2013.11.17 15:58:34 LOG7[23729:139952118695680]: 0 server connects that finished2013.11.17 15:58:34 LOG7[23729:139952118695680]: 0 server renegotiations requested2013.11.17 15:58:34 LOG7[23729:139952118695680]: 0 session cache hits2013.11.17 15:58:34 LOG7[23729:139952118695680]: 0 external session cache hits2013.11.17 15:58:34 LOG7[23729:139952118695680]: 0 session cache misses2013.11.17 15:58:34 LOG7[23729:139952118695680]: 0 session cache timeouts2013.11.17 15:58:34 LOG6[23729:139952118695680]: SSL connected: new session negotiated2013.11.17 15:58:34 LOG6[23729:139952118695680]: Negotiated ciphers: RC4-SHA SSLv3 Kx=RSA Au=RSA Enc=RC4(128) Mac=SHA12013.11.17 15:58:34 LOG7[23729:139952118695680]: SSL socket closed on SSL_read2013.11.17 15:58:34 LOG7[23729:139952118695680]: Socket write shutdown2013.11.17 15:58:34 LOG5[23729:139952118695680]: Connection closed: 90 bytes sent to SSL, 860 bytes sent to socket2013.11.17 15:58:34 LOG7[23729:139952118695680]: gmail-smtp finished (0 left)2013.11.17 16:01:01 LOG7[23729:139952118699968]: gmail-smtp accepted FD=13 from 127.0.0.1:561202013.11.17 16:01:01 LOG7[23729:139952118695680]: gmail-smtp started2013.11.17 16:01:01 LOG7[23729:139952118695680]: FD 13 in non-blocking mode2013.11.17 16:01:01 LOG7[23729:139952118695680]: Waiting for a libwrap process2013.11.17 16:01:01 LOG7[23729:139952118695680]: Acquired libwrap process #02013.11.17 16:01:01 LOG7[23729:139952118695680]: Releasing libwrap process #02013.11.17 16:01:01 LOG7[23729:139952118695680]: Released libwrap process #02013.11.17 16:01:01 LOG7[23729:139952118695680]: gmail-smtp permitted by libwrap from 127.0.0.1:561202013.11.17 16:01:01 LOG5[23729:139952118695680]: gmail-smtp accepted connection from 127.0.0.1:561202013.11.17 16:01:01 LOG7[23729:139952118695680]: FD 14 in non-blocking mode2013.11.17 16:01:01 LOG6[23729:139952118695680]: connect_blocking: connecting 74.125.129.109:4652013.11.17 16:01:01 LOG7[23729:139952118695680]: connect_blocking: s_poll_wait 74.125.129.109:465: waiting 10 seconds2013.11.17 16:01:01 LOG5[23729:139952118695680]: connect_blocking: connected 74.125.129.109:4652013.11.17 16:01:01 LOG5[23729:139952118695680]: gmail-smtp connected remote server from 172.31.22.161:569712013.11.17 16:01:01 LOG7[23729:139952118695680]: Remote FD=14 initialized2013.11.17 16:01:01 LOG7[23729:139952118695680]: SSL state (connect): before/connect initialization2013.11.17 16:01:01 LOG7[23729:139952118695680]: SSL state (connect): SSLv3 write client hello A2013.11.17 16:01:01 LOG7[23729:139952118695680]: SSL state (connect): SSLv3 read server hello A2013.11.17 16:01:01 LOG7[23729:139952118695680]: SSL state (connect): SSLv3 read finished A2013.11.17 16:01:01 LOG7[23729:139952118695680]: SSL state (connect): SSLv3 write change cipher spec A2013.11.17 16:01:01 LOG7[23729:139952118695680]: SSL state (connect): SSLv3 write finished A2013.11.17 16:01:01 LOG7[23729:139952118695680]: SSL state (connect): SSLv3 flush data2013.11.17 16:01:01 LOG7[23729:139952118695680]: 1 items in the session cache2013.11.17 16:01:01 LOG7[23729:139952118695680]: 2 client connects (SSL_connect())2013.11.17 16:01:01 LOG7[23729:139952118695680]: 2 client connects that finished2013.11.17 16:01:01 LOG7[23729:139952118695680]: 0 client renegotiations requested2013.11.17 16:01:01 LOG7[23729:139952118695680]: 0 server connects (SSL_accept())2013.11.17 16:01:01 LOG7[23729:139952118695680]: 0 server connects that finished2013.11.17 16:01:01 LOG7[23729:139952118695680]: 0 server renegotiations requested2013.11.17 16:01:01 LOG7[23729:139952118695680]: 1 session cache hits2013.11.17 16:01:01 LOG7[23729:139952118695680]: 0 external session cache hits2013.11.17 16:01:01 LOG7[23729:139952118695680]: 0 session cache misses2013.11.17 16:01:01 LOG7[23729:139952118695680]: 0 session cache timeouts2013.11.17 16:01:01 LOG6[23729:139952118695680]: SSL connected: previous session reused2013.11.17 16:01:02 LOG7[23729:139952118695680]: SSL socket closed on SSL_read2013.11.17 16:01:02 LOG7[23729:139952118695680]: Socket write shutdown2013.11.17 16:01:02 LOG5[23729:139952118695680]: Connection closed: 241 bytes sent to SSL, 825 bytes sent to socket2013.11.17 16:01:02 LOG7[23729:139952118695680]: gmail-smtp finished (0 left) Thanks a lot

1 0

Weird tunneling eMule's web interface
by Javier 17 Nov '13

17 Nov '13

Hi there, lets see: When I setup a server for the eMule's web interface and I access with the browser through https, the result is that the web interface never fully loads. When I setup a server for the web interface and a client connecting to that server and I access with the browser through http and with help of the client, the web interface loads without problems. Ok, at this point you think... "maybe the browser doesn't understand stunnel server at first instance for some reason... and needs the client to have a good SSL connection". So, we complicate things.... ;-) I made the following scenario because, sometimes, you can't use a client in the remote computer (where is not the web interface, if you are lost what with I'm telling). So, now we setup a server for the web interface, a client that connects to the server and a new server that connects to the client to serve to the remote browser... and... happens the same as the first example, as if it was only one server serving the web interface: it never fully loads. (I know, this scenario was quite weird :-P ). In case it was the browser I checked max connections, pipelining, etc, (allowing crazy max connection limits) but that didn't help on success :-( No matter of what web browser I use, they all do the same. They create between 7 to 15 connections with stunnel (sometimes more, others less) and nothing else. With the help of the client, all is smooth with over 150 connections. I tried too to create an html file "similar" to the web interface with the same resources (basically loads of images and therefore requests per second) and with my own web server and, in this case, there was no drama at all. The browsers connect to the stunnel server with over 190 connections in an eye blink and without of an stunnel client. At this point, I'm quite lost :-S Why doesn't load the web interface connecting directly to the stunnel server but does with the help of a client? Any ideas? Probably is the built-in web server of eMule, but it doesn't give problems when there is no stunnel in between or when using an stunnel client to connect to that stunnel server :S If you use eMule, test it and tell me if it works for you. Regards. P.S.: I hope you understood all because, even for me, has been confusing to explain.

1 0

stunnel server configuration requirement to handle CBC protection
by Simner, John 13 Nov '13

13 Nov '13

Hi, Having recently used stunnel on the phone as a server to encrypt the communication between an external client and a simple TCP server socket on the phone, one of the clients have raised the following.... Phone resets a TLS conection from client, when CBC protection is enabled on tomcat server. The phone syslog shows: Oct 28 14:26:14 10 user.crit syslog: CommsChannelExtenderRx(28881): ./src/CommsChannelExtenderRx.cpp:186 Header section invalid To prevent a SSL/TLS BEAST attack (CVE-2011-3389) Oracle Java (JSSE) has implemented a CBC protection which can be set with System Property jsse.enableCBCProtection. The default value is true. What was done: Start client and connect it with a phone. The TLS connection is established, but then the phone resets the connection, and client is not working. When I set jsse.enableCBCProtection to false at the tomcat server, the phone accepts the connection and client is working. To prevent man-in-the-middle attacks, the phone should be able to handle the fragmented TLS block when CBC protection is activated on the client tomcat server. I have been unable to find the appropriate stunnel configuration item to support this. Please could you inform me how this is handled through stunnel. Thank you for your assistance and I look forward to your responses. Thanks.. John John Simner BSc(Hons) MSc CEng. MIET Software Engineer Unify Enterprise Communications Ltd. Devices Development K Block, Technology Drive, Beeston, Nottingham, NG9 1LA Tel.: +44 (0) 19088 17378 Email: john.simner(a)unify.com <mailto:vorname.name@unify.com> www.unify.co.uk<http://www.unify.co.uk/> Follow us: [Social_media_icons] <http://www.unify.com/social-media> Unify Enterprise Communications Limited. Registered Office: Brickhill Street, Willen Lake, Milton Keynes, MK15 0DJ Registered No: 5903714, England. This email contains confidential information and is for the exclusive use of the addressee. If you are not the addressee then any distribution, copying, or use of this email is prohibited. If received in error, please advise the sender and delete immediately. We accept no liability for any loss or damage suffered by any person arising from use of this email.

4 10

Patch for Start TLS for LDAP clients (RFC 2830)
by Bart Dopheide 07 Nov '13

07 Nov '13

Hi, I noticed that latest/greatest stunnel does not support the Start TLS operation for LDAP (RFC2830). Yet, I need it in my organisation as a quick workaround. After fiddling with OpenLDAP, tracing, and reading RFC 2830 a bit, I patched stunnel 4.56 and the patch has not failed me yet. But I must remark that I am no LDAP expert, nor an certified stunnel hacker. So, I will submit this patch as a first suggestion. Will you consider the feature request of implementing the Start TLS feature as described in RFC 2830? Cheers, Bart Dopheide My patch suggestion is: dopheideb@anguish:/tmp$ diff -aur stunnel-4.56 stunnel-4.56-ldap-starttls-patch diff -aur stunnel-4.56/src/protocol.c stunnel-4.56-ldap-starttls-patch/src/protocol.c --- stunnel-4.56/src/protocol.c 2013-03-13 14:41:16.000000000 +0100 +++ stunnel-4.56-ldap-starttls-patch/src/protocol.c 2013-11-05 11:19:10.388365359 +0100 @@ -53,6 +53,7 @@ static void imap_client(CLI *); static void imap_server(CLI *); static void nntp_client(CLI *); +static void openldap_client(CLI *); static void connect_server(CLI *); static void connect_client(CLI *); @@ -82,6 +83,7 @@ {"pop3", {{PROTOCOL_PRE_SSL, pop3_server}, {PROTOCOL_PRE_SSL, pop3_client}}}, {"imap", {{PROTOCOL_PRE_SSL, imap_server}, {PROTOCOL_PRE_SSL, imap_client}}}, {"nntp", {{PROTOCOL_NONE, NULL}, {PROTOCOL_PRE_SSL, nntp_client}}}, + {"openldap",{{PROTOCOL_NONE, NULL}, {PROTOCOL_PRE_SSL, openldap_client}}}, {"connect", {{PROTOCOL_PRE_CONNECT, connect_server}, {PROTOCOL_PRE_SSL, connect_client}}}, {NULL, {{PROTOCOL_NONE, NULL}, {PROTOCOL_NONE, NULL}}} }; @@ -513,6 +515,88 @@ str_free(line); } +/**************************************** LDAP, RFC 2830 */ + +u8 ldap_startssl_message[0x1d + 2] = +{ + 0x30, /* tag = UNIVERSAL SEQUENCE */ + 0x1d, /* len = 29 (the remaining number of bytes in this message) */ + 0x02, /* messageID */ + 0x01, /* len = 1 */ + 0x01, /* value = 1 (this is messageID 1) */ + /* --- */ + 0x77, /* protocolOp = APPLICATION (23) (=ExtendedRequest) + * 0b01xxxxxx => APPLICATION + * 0bxx1xxxxx => ? + * 0xxxx10111 => 23 + */ + 0x18, /* len = 24 */ + 0x80, /* type = requstName? */ + 0x16, /* len = 22 */ + /* OID: 1.3.6.1.4.1.1466.20037 (=LDAP_START_TLS_OID)*/ + '1', '.', + '3', '.', + '6', '.', + '1', '.', + '4', '.', + '1', '.', + '1', '4', '6', '6', '.', + '2', '0', '0', '3', '7' + /* No requestValue, as per RFC2830 (in 2.1: "The requestValue field is absent") */ +}; +static void openldap_client(CLI *c) { + u8 buffer[1]; + u8 ldap_response[256]; + + s_log(LOG_DEBUG, "Requesting LDAP Start TLS"); + write_blocking(c, c->remote_fd.fd, ldap_startssl_message, ldap_startssl_message[1] + 2); + + read_blocking(c, c->remote_fd.fd, buffer, 1); + if(buffer[0] != 0x30) { + s_log(LOG_ERR, "start tag is not UNIVERSAL SEQUENCE"); + longjmp(c->err, 1); + } + + s_log(LOG_DEBUG, "Reading LDAP message size (1 byte)."); + read_blocking(c, c->remote_fd.fd, buffer, 1); + + s_log(LOG_DEBUG, "Reading LDAP message (%u byte(s))", buffer[0]); + read_blocking(c, c->remote_fd.fd, ldap_response, buffer[0]); + + if(ldap_response[0] != 0x02) { + s_log(LOG_ERR, "LDAP response does not start with type messageID"); + longjmp(c->err, 1); + } + if(ldap_response[1] != 0x01) { + s_log(LOG_ERR, "This is not an extendedResp(1)"); + longjmp(c->err, 1); + } + if(ldap_response[2] != 0x01) { + s_log(LOG_ERR, "Non-matching messageID"); + longjmp(c->err, 1); + } + if(ldap_response[3] != 0x78) { + s_log(LOG_ERR, "This is not a protocolOp for APPLICATION ExtendedResponse"); + longjmp(c->err, 1); + } + if(ldap_response[4] != 0x07) { + s_log(LOG_ERR, "Expected 0x07 indicating extendedResp is 7 bytes long"); + longjmp(c->err, 1); + } + if(ldap_response[5] != 0x0a) { + s_log(LOG_ERR, "This is not an extendedResp"); + longjmp(c->err, 1); + } + if(ldap_response[6] != 0x01) { + s_log(LOG_ERR, "This is not an extendedResp"); + longjmp(c->err, 1); + } + if(ldap_response[7] != 0x00) { + s_log(LOG_ERR, "This is not resultCode success"); + longjmp(c->err, 1); + } +} + /**************************************** connect */ static void connect_server(CLI *c) { dopheideb@anguish:/tmp$

3 2

stunnel x forwarded not working
by Libindas 05 Nov '13

05 Nov '13

Hi all, We are facing problem with stunnel + HAproxy + Tomcat Client -----> Stunnel-----> HAProxy----> Tomcat { I need get client IP in Tomcat Servers} I have compiled(stunnel-4.32 + stunnel-4.32-xforwarded-for.diff) and installed but not working. Really appreciate your help Thanks Libin

2 1

Trouble sending email via smtp with a particular gmail address
by Brian Morgan 01 Nov '13

01 Nov '13

I'm having trouble sending email through stunnel with our customer service email address. We use google premium services for our hosted email. I can send through stunnel using my own personal account, but when I switch to the cust service account, I get the error: "Failed to send an E-mail through the specified SMTP server [127.0.0.1]: The SMTP server requires a secure connection or the client was not authenticated. The server response was 5.5.1 Authentication Required." And yes, I double/triple checked credentials and can login through the gmail interface with them just fine. I also tried changing the password to a strong password which did not help. gmail settings in stunnel.conf: [gmail-smtp] client = yes accept = 127.0.0.1:259 connect = smtp.gmail.com:465 I also tried port 587 but that produces another error: "Failed to send an E-mail through the specified SMTP server [127.0.0.1]: Failure sending mail." Any ideas?

2 4

Clear LogWindow without Restart stunnel possible?
by Ben Stover 01 Nov '13

01 Nov '13

Can I somehow clear the current LogWindows WITHOUT exit+restarting stunnel?

2 1

Question Regarding Client Installer
by Andrew Smith 29 Oct '13

29 Oct '13

We currently use Stunnel to allow our clients to connect to their Databases that are hosted by us. I think this product is great. However, I am a newbie to Stunnel as our previous resource has passed away. What I would like to know now to do is create an installer for clients machines that have the correct configuration files in etc... I am sure this is pretty easy and I will be able to do it this once I am guided in the correct direction. Thanks in advance! ________________________________ Andrew Smith Support Technical Services Analyst P: 614-875-4910 x109 F: 614-875-4088 E: andrew.smith(a)harriscomputer.com [http://www.harriscomputer.com/images/signatures/HarrisSchools.jpg] [http://www.harriscomputer.com/images/signatures/DivisionofHarris.gif]<http://www.harriscomputer.com/> 6110 Enterprise Parkway Grove City, OH 43123 www.harris-schoolsolutions.com<http://www.harris-schoolsolutions.com> This message is intended exclusively for the individual or entity to which it is addressed. This communication may contain information that is proprietary, privileged or confidential or otherwise legally exempt from disclosure. If you are not the named addressee, you are not authorized to read, print, retain, copy or disseminate this message or any part of it. If you have received this message in error, please notify the sender immediately by e-mail and delete all copies of the message.

2 1

Re: [stunnel-users] Is it usual/recommended to have key and cert in ONE stunnel.pem file?
by Ben Stover 29 Oct '13

29 Oct '13

Hello John, thank you for your clarification. Two more additional questions: According to stunnel guide I created a cert + key with the following command: openssl.exe req -new -x509 -days 3650 -nodes -config stunnel.cnf -out stunnelcert.pem -keyout stunnelkey.pem 1.) For what do I need here the -config stunnel.cnf parameter? I am prompted by openssl for the content values during generation anyway. Can stunnel.cnf be seen only as a default value pattern for the created cert during generation? Can I omit this parameter? 2.) After creation of cert+key I have to specify them (as client) in stunnel.conf (with "o") as follows: cert = stunnelcert.pem key = stunnelkey.pem Is this sufficient? Thank you Ben On Mon, Oct 28, 2013 at 06:39:15PM +0100, Ben Stover wrote: > According to some tutorial pages I generated with OpenSSL a (selfsigned) certificate. > > This file stunnel.pem contains the certifictae as well as the private key. > > Is this usual/recommended? Hello John, That sort of falls into the "tragedy waiting to happen" category. The certificate is supposed to be given to clients, and the key belongs to the server and has to be kept private or there's really no point in using SSL. > Or should user put these two parts in two independent files? Yes, absolutely. In fact I suppose you're using Windows or went through some hoop-jumping to combine them, because in "normal" OpenSSL usage the key is generated first and then the certs are requested and signed by the CA (or selfsigning) key. /jl

2 1

VPAT Section 508 Compliance
by Tracy Drake - QI-C 28 Oct '13

28 Oct '13

Hello Stunnel Support! I am seeking a VPAT showing the level Sec 508 compliance so that we can move toward making Stunnel a GSA-approved software. I guess the biggest question is whether or not Stunnel is considered to be section 508 compliant. Please advise as to where/how I can obtain this information. -- Tracy Drake CSM Senior Consultant GSA-FAS FAME Contractor URSA & INFOConnect Support & Training Team Lead 704-987-1211 tracy.drake(a)gsa.gov

1 0

Is it usual/recommended to have key and cert in ONE stunnel.pem file?
by Ben Stover 28 Oct '13

28 Oct '13

According to some tutorial pages I generated with OpenSSL a (selfsigned) certificate. This file stunnel.pem contains the certifictae as well as the private key. Is this usual/recommended? Or should user put these two parts in two independent files? Ben

2 1

Is "fips=no" recommended?
by Ben Stover 25 Oct '13

25 Oct '13

I stunnel.conf there is a parameter fips=no which is currently commented out here. Is it (resp. when is it) recommended to activate this parameter? Ben

2 1

Verify = 4 Fails Yet Again
by Thomas Eifert 25 Oct '13

25 Oct '13

I've just encountered another situation in which verify = 4 fails on a seemingly valid certificate. Since I've previously posted details regarding this issue, I'm only going to post the certificate here. This is the 3rd certificate I've run across in the past 6 months that fails to verify. Can all 3 of the certificates be faulty, or is there an issue with Stunnel or OpenSSL here? Thomas -----BEGIN CERTIFICATE----- MIIGyTCCBbGgAwIBAgIQC0NHQrtbGPWbZINtfJec1jANBgkqhkiG9w0BAQUFADBm MQswCQYDVQQGEwJVUzEVMBMGA1UEChMMRGlnaUNlcnQgSW5jMRkwFwYDVQQLExB3 d3cuZGlnaWNlcnQuY29tMSUwIwYDVQQDExxEaWdpQ2VydCBIaWdoIEFzc3VyYW5j ZSBDQS0zMB4XDTEzMDYwMzAwMDAwMFoXDTE2MDgxMDEyMDAwMFowgYQxCzAJBgNV BAYTAlVTMRMwEQYDVQQIEwpDYWxpZm9ybmlhMRIwEAYDVQQHEwlFc2NvbmRpZG8x JjAkBgNVBAoTHUZvcnRlIEludGVybmV0IFNvZnR3YXJlLCBJbmMuMQswCQYDVQQL EwJJVDEXMBUGA1UEAwwOKi5mb3J0ZWluYy5jb20wggEiMA0GCSqGSIb3DQEBAQUA A4IBDwAwggEKAoIBAQDZ8XZFzc6kdJt8WMByc4VPw7Ru4JZ6P+AyZXcLNA/hSih0 Xes5fGjw7oBTyUJWic/FIe397AKkjM8WGtH70EnOv3BzAHzv5ftdhG6UskJmZV7K pokKao+M6AtL0yLyXTDXXF0c7dcUwmQ9lu2LIvyqMCo5RNjaNHPoG+pqxXSN4mSj kSxUsW62p6+qE+uJGBP9HW14DGzE+OBUfB/noC63qMWjYIOWmRX/rIC8H6NyFBWl K0X0yUkxbkc5o/f9DiChCCvzK7RUIiZfDxBKKQ4VZq8+cIHIhHzbziDj2J7Twj2b VeL052E7EjTxRvYIEkyaU2JIbvcLKDzJ1H5vHxpTAgMBAAGjggNSMIIDTjAfBgNV HSMEGDAWgBRQ6nOJ2yn7EI+e5QEg1N55mUiD9zAdBgNVHQ4EFgQUwgLEas/pP7rM UfpMXPrkHEg4SWcwJwYDVR0RBCAwHoIOKi5mb3J0ZWluYy5jb22CDGZvcnRlaW5j LmNvbTAOBgNVHQ8BAf8EBAMCBaAwHQYDVR0lBBYwFAYIKwYBBQUHAwEGCCsGAQUF BwMCMGEGA1UdHwRaMFgwKqAooCaGJGh0dHA6Ly9jcmwzLmRpZ2ljZXJ0LmNvbS9j YTMtZzIyLmNybDAqoCigJoYkaHR0cDovL2NybDQuZGlnaWNlcnQuY29tL2NhMy1n MjIuY3JsMIIBxAYDVR0gBIIBuzCCAbcwggGzBglghkgBhv1sAQEwggGkMDoGCCsG AQUFBwIBFi5odHRwOi8vd3d3LmRpZ2ljZXJ0LmNvbS9zc2wtY3BzLXJlcG9zaXRv cnkuaHRtMIIBZAYIKwYBBQUHAgIwggFWHoIBUgBBAG4AeQAgAHUAcwBlACAAbwBm ACAAdABoAGkAcwAgAEMAZQByAHQAaQBmAGkAYwBhAHQAZQAgAGMAbwBuAHMAdABp AHQAdQB0AGUAcwAgAGEAYwBjAGUAcAB0AGEAbgBjAGUAIABvAGYAIAB0AGgAZQAg AEQAaQBnAGkAQwBlAHIAdAAgAEMAUAAvAEMAUABTACAAYQBuAGQAIAB0AGgAZQAg AFIAZQBsAHkAaQBuAGcAIABQAGEAcgB0AHkAIABBAGcAcgBlAGUAbQBlAG4AdAAg AHcAaABpAGMAaAAgAGwAaQBtAGkAdAAgAGwAaQBhAGIAaQBsAGkAdAB5ACAAYQBu AGQAIABhAHIAZQAgAGkAbgBjAG8AcgBwAG8AcgBhAHQAZQBkACAAaABlAHIAZQBp AG4AIABiAHkAIAByAGUAZgBlAHIAZQBuAGMAZQAuMHsGCCsGAQUFBwEBBG8wbTAk BggrBgEFBQcwAYYYaHR0cDovL29jc3AuZGlnaWNlcnQuY29tMEUGCCsGAQUFBzAC hjlodHRwOi8vY2FjZXJ0cy5kaWdpY2VydC5jb20vRGlnaUNlcnRIaWdoQXNzdXJh bmNlQ0EtMy5jcnQwDAYDVR0TAQH/BAIwADANBgkqhkiG9w0BAQUFAAOCAQEAfaQd sAZueUdpTa/3TBpGPlKRiirlATk4kLgpk08R73hEsbA3LICRA5RbfvBGZ56031Hh rxzU8ZhI8q4kKiLbYawpRw9bzxlX35GW5MwuZiQTY0eL45V2L17Ya+Qi1+zYSAvA ZrkC2IGXUuV+sup+WQ8nx+A+HE0aGBWwCoza8qbrbFc86DrPKaGBqyanSSNQBDOg Jzojg6do31qnrDOc/Sg9fckSOtBTFO3Dqgyv0UiaaimcQE3OOqEeianQ7REE2XIX 96d2iRp5fVxMjx9SCfaD31DIogTbYmrw7+3KEPgU8QNn1RAzjPUkSZxvcO8X/Xue vw2kqH9uZ7dlx7c6CA== -----END CERTIFICATE----- -- Attention: This message and all attachments are private and may contain information that is confidential and privileged. If you received this message in error, please notify the sender by reply email and delete the message immediately.

2 10

Transparent Proxy Source on HPUX 11i
by Jeremy Brock 24 Oct '13

24 Oct '13

Hi All, Are there any plans to make Transparent Mode possible on HPUX? 2013.10.22 16:24:22 LOG5[3607:1]: stunnel 4.56 on ia64-hp-hpux11.23 platform 2013.10.22 16:24:22 LOG5[3607:1]: Compiled/running with OpenSSL 0.9.8y 5 Feb 2013 2013.10.22 16:24:22 LOG5[3607:1]: Threading:PTHREAD Sockets:POLL,IPv6 SSL:ENGINE,OCSP 2013.10.22 16:24:22 LOG5[3607:1]: Reading configuration from file /ASKPLUS/stunnel/stunnel.conf 2013.10.22 16:24:22 LOG5[3607:1]: Configuration successful 2013.10.22 16:24:47 LOG5[3608:2]: Service [ vsrvtcp ] accepted connection from 192.168.15.6:1169 *2013.10.22 16:24:47 LOG3[3608:2]: Transparent proxy in remote mode is not supported on this platform* 2013.10.22 16:24:47 LOG5[3608:2]: Connection reset: 0 byte(s) sent to SSL, 0 byte(s) sent to socket ~Jeremy -- Jeremy Brock Vital Soft, Inc www.vital-soft.com

2 1

Stunnel Service as other user
by Florian Götz 24 Oct '13

24 Oct '13

Hi Stunnel users, if I use xinetd to start a service I got the possibility to start the service with a dedicated user. For example: service fex { socket_type = stream wait = no type = unlisted protocol = tcp bind = 123.12.1.12 port = 80 cps = 10 2 * user = fex groups = yes server = /home/fex/bin/fexsrv nice = 0 disable = no } I got some kind of webserver (not apache, nginx etc) that needs to be started with xinetd (the example above). This server should get a SSL tunnel. If I use Stunnel in daemon mode (without jails/chroot) and define a service like this: [https] accept = 123.12.1.12:443 exec = /home/fex/bin/fexsrv execargs = fexsrv stunnel TIMEOUTclose = 2 Everything works fine, except that the server now runs as root. Is there a possibility to set a user for a service? Best regards Florian Götz -- Mit freundlichen Grüßen Florian Götz ----------------------------------------------------------------- Dipl.-Inf. (FH) Florian Götz Rechenzentrum Hochschule Mannheim Paul-Wittsack-Straße 10 68163 Mannheim Tel: 0621/292-6232 EMail: f.goetz(a)hs-mannheim.de Internet: http://www.rz.hs-mannheim.de -----

2 1

Username and Password in Clear Text
by Peter K. O'Connor 24 Oct '13

24 Oct '13

Hi, I am using stunnel 4.56 Windows verison. I thought the username and password will *only* be sent to SERVER2, *after* the SSL handshake, with each request. However, the truth is that the Proxy-Authorization header is attached to the request to SERVER1 "CONNECT SERVER2:433 HTTP/1.1", as well. So SERVER1 can see username and password. It is not necessary and safe. Am I missing anything here? Regards, Peter [stunnel] client = yes accept = 127.0.0.1:8080 connect = SERVER1:3128 protocol = connect protocolHost = SERVER2:443 protocolUsername = username protocolPassword = password

2 1

Re: [stunnel-users] Which X.509 certificate types (.crt, .pem, .der .p7c) possible for stunnel and how to import them?
by Ben Stover 24 Oct '13

24 Oct '13

Assume I have already an *.pem cert (for SMTP over STARTTLS transfer). Where (in whcih directory) should I put this cert file? Ben On Fri, 18 Oct 2013 12:35:25 +0000, Eckert, Doug wrote: >You can use OpenSSL to convert between formats (to .pem for STunnel) >https://support.ssl.com/Knowledgebase/Article/View/19/0/der-vs-crt-vs-cer-v… >You can also use openssl to strip the key's passphrase. This is handy for automatic starting (init/cron/at) of STunnel without having it prompt for the passphrase. > $ openssl rsa -in source.pem -out target.pem >-----Original Message----- >From: stunnel-users [mailto:stunnel-users-bounces@stunnel.org] On Behalf Of Ben Stover >Sent: Friday, October 18, 2013 3:21 AM >To: Stunnel Users >Subject: [stunnel-users] Which X.509 certificate types (.crt, .pem, .der .p7c) possible for stunnel and how to import them? >Which X.509 certificate types (e.g. .crt, .pem, .der .p7c) are possible for stunnel? >Assume I have got such a certificate as separate file (and not retrieved by OpenSSL). >How do I import it into stunnel? >Do I have to just copy it into (which ?) directory? >Does the certifcate file name have to have a certain pattern? >Or is stunnel smart enough to read and analyze the content independently from filename? >Thank you >Ben >_______________________________________________ >stunnel-users mailing list >stunnel-users(a)stunnel.org >https://www.stunnel.org/cgi-bin/mailman/listinfo/stunnel-users

1 0

Which X.509 certificate types (.crt, .pem, .der .p7c) possible for stunnel and how to import them?
by Ben Stover 18 Oct '13

18 Oct '13

Which X.509 certificate types (e.g. .crt, .pem, .der .p7c) are possible for stunnel? Assume I have got such a certificate as separate file (and not retrieved by OpenSSL). How do I import it into stunnel? Do I have to just copy it into (which ?) directory? Does the certifcate file name have to have a certain pattern? Or is stunnel smart enough to read and analyze the content independently from filename? Thank you Ben

2 1

How to setup most detailed error log (for one service?
by Ben Stover 17 Oct '13

17 Oct '13

currently I have specified in *.conf file debug = 7 Is this the most detailed log output possible? I miss somehow the transfer protocol lines (what is sent and what received) How do I get this? Is it possible to setup debug = 3 as global variable and to define debug = 7 for just ONE particular service? Ben

2 1

stunnel server communicating external client IP addresses through to a TCP server for logging purposes
by Simner, John 17 Oct '13

17 Oct '13

Hi, We have recently used stunnel on the phone as a server to encrypt the communication between an external client and a TCP server on the phone. There is a requirement for the phone to log every external client access. Is there any way for stunnel to include the IP address of the external client when setting up an new TCP connection to the local TCP server? Thank you for your assistance and I look forward to your responses. Thanks.. John John Simner BSc(Hons) MSc CEng. MIET Software Engineer Unify Enterprise Communications Ltd. Devices Development K Block, Technology Drive, Beeston, Nottingham, NG9 1LA Tel.: +44 (0) 19088 17378 Email: john.simner(a)unify.com <mailto:vorname.name@unify.com> www.unify.co.uk<http://www.unify.co.uk/> Follow us: [Social_media_icons] <http://www.unify.com/social-media> Unify Enterprise Communications Limited. Registered Office: Brickhill Street, Willen Lake, Milton Keynes, MK15 0DJ Registered No: 5903714, England. This email contains confidential information and is for the exclusive use of the addressee. If you are not the addressee then any distribution, copying, or use of this email is prohibited. If received in error, please advise the sender and delete immediately. We accept no liability for any loss or damage suffered by any person arising from use of this email.

2 1

How to get the remote mail server certificate before/at first connect?
by Ben Stover 17 Oct '13

17 Oct '13

When I connect from my local mail client (e.g. Thunderbird) the first time (!) with a remote mail server through STARTTLS for a SMTP session then at first a server certificate is delivered. On the Thunderbird email client side a popup appears which prompts me to confirm the remote server certificate. Only AFTER this confirmation I am able to send email through this STARTTLS SMTP connection. Ok. Now lets switch to another scenario where a non-default email client (=NOT Thunderbird) want to send emails through stunnel to the remote mail server. Everything is setup in stunnel.conf and propriatary email client. But how do I get the remote server certificate (for stunnel)? Is there an option in stunnel.conf to receive and auto-accept the delivered server certificate at first? Where is it stored? Can I extract certificate from Thunderbird and import it to stunnel? Ben

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Re: [stunnel-users] EXTERNAL: How to setup stunnel für SMTP over STARTTL S (and not pure SSL)?
by Bucci, David G 16 Oct '13

16 Oct '13

The protocol directive determines what Stunnel does during the connection setup. "protocol = smtp" tells Stunnel to use STARTTLS semantics for the connection to the server, as described in RFC2487 (similarly to how "protocol = imap" tells it to use STARTTLS for IMAP, per RFC 2595). -----Original Message----- From: Ben Stover [mailto:bxstover@yahoo.co.uk] Sent: Wednesday, October 16, 2013 11:08 AM To: Stunnel Users Cc: Bucci, David G Subject: RE: EXTERNAL: How to setup stunnel für SMTP over STARTTL S (and not pure SSL)? Sorry, I went to the webpage with the link you mentioned. There I searched for STARTTLS but NO (!) occurence was found. What does protocol (here = smtp) to do with the security handshare type (here = STARTTLS). On Wed, 16 Oct 2013 13:10:29 +0000, Bucci, David G wrote: >Oh, meant to add - look at the "protocol" option, documented here: http://www.stunnel.org/static/stunnel.html >-----Original Message----- >From: Bucci, David G >Sent: Wednesday, October 16, 2013 8:54 AM >To: 'Ben Stover'; Stunnel Users >Subject: RE: EXTERNAL: How to setup stunnel für SMTP over STARTTLS (and not pure SSL)? >https://www.stunnel.org/pipermail/stunnel-users/2011-April/003060.html >Yes, it's supported. (you'll get a cert error on that connect, ironically) >-----Original Message----- >From: stunnel-users [mailto:stunnel-users-bounces@stunnel.org] On Behalf Of Ben Stover >Sent: Wednesday, October 16, 2013 5:56 AM >To: Stunnel Users >Subject: EXTERNAL: How to setup stunnel für SMTP over STARTTLS (and not pure SSL)? >Assume my mailbox provider offers only SMTP delivery over STARTTLS (and not pure SSL). >How do I have configure stunnel to cope with this protocol? >Lets say the remote smtp server would be >smtp.foobar.com:587 >How would a service section in conf file look like? >Thank you >Ben >_______________________________________________ >stunnel-users mailing list >stunnel-users(a)stunnel.org >https://www.stunnel.org/cgi-bin/mailman/listinfo/stunnel-users

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Re: [stunnel-users] EXTERNAL: How to setup stunnel für SMTP over STARTTL S (and not pure SSL)?
by Michal Trojnara 16 Oct '13

16 Oct '13

On 10/16/2013 05:07 PM, Ben Stover wrote: > Sorry, I went to the webpage with the link you mentioned. > There I searched for STARTTLS but NO (!) occurence was found. This is because STARTTLS is not a separate protocol, but rather an option (usually an extension) of various protocols that can negotiate SSL/TLS encryption. http://en.wikipedia.org/wiki/STARTTLS Mike

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Re: [stunnel-users] EXTERNAL: How to setup stunnel für SMTP over STARTTLS (and not pure SSL)?
by Bucci, David G 16 Oct '13

16 Oct '13

https://www.stunnel.org/pipermail/stunnel-users/2011-April/003060.html Yes, it's supported. (you'll get a cert error on that connect, ironically) -----Original Message----- From: stunnel-users [mailto:stunnel-users-bounces@stunnel.org] On Behalf Of Ben Stover Sent: Wednesday, October 16, 2013 5:56 AM To: Stunnel Users Subject: EXTERNAL: How to setup stunnel für SMTP over STARTTLS (and not pure SSL)? Assume my mailbox provider offers only SMTP delivery over STARTTLS (and not pure SSL). How do I have configure stunnel to cope with this protocol? Lets say the remote smtp server would be smtp.foobar.com:587 How would a service section in conf file look like? Thank you Ben _______________________________________________ stunnel-users mailing list stunnel-users(a)stunnel.org https://www.stunnel.org/cgi-bin/mailman/listinfo/stunnel-users

1 1

Disable support for insecure SSLv2 protocol but allow for ONE service
by Ben Stover 16 Oct '13

16 Oct '13

When I try to connect to one of my mailboxes I get a return: SSL_connect: 1408F10B: error:1408F10B:SSL routines:SSL3_GET_RECORD:wrong version number Connection reset: 0 byte(s) sent to SSL, 0 byte(s) sent to socket What does that mean? in stunnel.conf I set the global parameter: options = NO_SSLv2 This works in general. But for the mentioned email provider it could mean that he allows only SSLv2. Is this the reason? Where is described what is inscure at SSLv2? How can I allow for that particular email provider SSLv2 but disallow for all others? Ben

4 3

Writing "hello" to log window when entering a certain service section?
by Ben Stover 15 Oct '13

15 Oct '13

Assume an (unknown) client on my computer connects through stunnel to a remote server. As soon as this local client connects local stunnel the stunnel should write a user specified string line to the log window (if possible in bold letters). Can I define this with a syntax similar to: [gmail-pop3] client = yes output = "hello outgoing alert gmail port 1109" accept = 127.0.0.1:1109 connect = pop.gmail.com:995 Thank you Peter

2 1

An issue with chroot, mail.pem and OmniOS/illumos (SunOS)
by Olaf Marzocchi 13 Oct '13

13 Oct '13

Dear all, I have been trying to set up stunnel to encrypt a SMTP connection. The config of the encryption should be fine, I used it already on another OS, but I cannot get stunnel to start on my home server, based on OmniOS (kernel illumos), identified as "SunOS". This is my config: ---- chroot = /opt/omni/var/lib/stunnel/ ; Chroot jail can be escaped if setuid option is not used setuid = nobody setgid = nogroup ;pid = /opt/omni/var/lib/stunnel/stunnel.pid ; Certificate/key is needed in server mode and optional in client mode cert = /opt/omni/etc/stunnel/mail.pem ;key = /opt/omni/etc/stunnel/mail.pem [smtp-tls-wrapper] accept = localhost:11125 client = yes connect = ssl0.ovh.net:465 ;delay = yes ---- and the directories mentioned have the following permissions: ---- OmniOS-Xeon:~ $ ls -al /opt/omni/etc/stunnel/ total 28 drwxr-xr-x 2 root bin 5 Sep 24 23:26 . drwxr-xr-x 5 root bin 6 Sep 23 23:53 .. -rw------- 1 root bin 3050 Sep 24 23:25 mail.pem -rw-r--r-- 1 stunnel stunnel 3247 Oct 13 22:56 stunnel.conf -rw-r--r-- 1 root bin 2997 Sep 23 23:53 stunnel.conf-sample OmniOS-Xeon:~ $ ls -al /opt/omni/var/lib/ total 9 drwxr-xr-x 3 root bin 3 Sep 23 23:53 . drwxr-xr-x 4 root bin 4 Sep 23 23:53 .. drwx------ 2 stunnel stunnel 2 Sep 23 23:53 stunnel ---- The service is started from the SMF facility provided by Solaris/OmniOS/... that launches as root/root the following: /opt/omni/bin/stunnel /opt/omni/etc/stunnel/stunnel.conf On execution I get the following error message: … Initializing service section [smtp-tls-wrapper] Certificate: /opt/omni/etc/stunnel/mail.pem Error reading certificate file: /opt/omni/etc/stunnel/mail.pem error queue: 140DC002: error:140DC002:SSL routines:SSL_CTX_use_certificate_chain_file:system lib error queue: 20074002: error:20074002:BIO routines:FILE_CTRL:system lib SSL_CTX_use_certificate_chain_file: 200100D: error:0200100D:system library:fopen:Permission denied str_stats: 9 block(s), 1032 data byte(s), 522 control byte(s) … I must be overlooking something but I cannot see my mistake. Could you please help me? Thank you very much in advance! Olaf Marzocchi

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stunnel behind http proxy server, only working for port 443
by Heng Su 09 Oct '13

09 Oct '13

Hi All, I try to connect to my stunnel server, however, only port 443 is working. For other ports are not working. Does it mean my company's proxy server is blocking SSL communication on all ports except 443? ( I am a newbie, just assuming stunnel always working with SSL even for 80 port, if I am wrong please point me out, thank you) Is there any other way to bypass the proxy server without SSL communication? Or internal proxy server can always detect tunnel actions if there is non-SSL protocol ? below is my configuration file for client side. /etc/stunnel/stunnel.conf ------------------START-------------------------- [https1] accept = 80 protocol = connect protocolAuthentication = basic protocolHost = myvpsserver-ip:80 protocolUsername = myname protocolPassword = p@ssw0rd connect = company-proxyserver:8080 [https2] accept = 443 protocol = connect protocolAuthentication = basic protocolHost = myvpsserver-ip:443 protocolUsername = myname protocolPassword = p@ssw0rd connect = company-proxyserver:8080 ----------------------------END--------------------------------------------- ---------------------------Tunnel PORT 80 ----------------------------- 2013.10.08 14:18:43 LOG7[10601:3078687600]: TCP_NODELAY option set on remote socket 2013.10.08 14:18:43 LOG5[10601:3078687600]: Negotiations for connect (client side) started 2013.10.08 14:18:43 LOG7[10601:3078687600]: -> CONNECT my-remote-server-ip:80 HTTP/1.1 2013.10.08 14:18:43 LOG7[10601:3078687600]: -> Host: my-remote-server-ip:80 2013.10.08 14:18:43 LOG7[10601:3078687600]: -> Proxy-Authorization: basic c3VoZW5nOlBAc3N3MHJk 2013.10.08 14:18:43 LOG7[10601:3078687600]: -> 2013.10.08 14:18:43 LOG7[10601:3078687600]: <- HTTP/1.1 403 Forbidden 2013.10.08 14:18:43 LOG3[10601:3078687600]: CONNECT request rejected 2013.10.08 14:18:43 LOG7[10601:3078687600]: <- Cache-Control: no-cache 2013.10.08 14:18:43 LOG7[10601:3078687600]: <- Pragma: no-cache 2013.10.08 14:18:43 LOG7[10601:3078687600]: <- Content-Type: text/html; charset=utf-8 2013.10.08 14:18:43 LOG7[10601:3078687600]: <- Proxy-Connection: close 2013.10.08 14:18:43 LOG7[10601:3078687600]: <- Connection: close 2013.10.08 14:18:43 LOG7[10601:3078687600]: <- Content-Length: 725 2013.10.08 14:18:43 LOG7[10601:3078687600]: <- 2013.10.08 14:18:43 LOG5[10601:3078687600]: Connection reset: 0 bytes sent to SSL, 0 bytes sent to socket ---------------------------Tunnel PORT 443 ----------------------------- 2013.10.08 14:42:00 LOG7[10601:3078687600]: TCP_NODELAY option set on remote socket 2013.10.08 14:42:00 LOG5[10601:3078687600]: Negotiations for connect (client side) started 2013.10.08 14:42:00 LOG7[10601:3078687600]: -> CONNECT my-remote-server-ip:443 HTTP/1.1 2013.10.08 14:42:00 LOG7[10601:3078687600]: -> Host: my-remote-server-ip:443 2013.10.08 14:42:00 LOG7[10601:3078687600]: -> Proxy-Authorization: basic c3VoZW5nOlBAc3N3MHJk 2013.10.08 14:42:00 LOG7[10601:3078687600]: -> 2013.10.08 14:42:00 LOG7[10601:3078687600]: <- HTTP/1.1 200 Connection established 2013.10.08 14:42:00 LOG6[10601:3078687600]: CONNECT request accepted 2013.10.08 14:42:00 LOG7[10601:3078687600]: <- 2013.10.08 14:42:00 LOG5[10601:3078687600]: Protocol negotiations succeeded -- Thanks & Best Regards, Su Heng

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Stunnel North American FTP Down?
by Thomas Eifert 07 Oct '13

07 Oct '13

This evening, I'm unable to access the North American Stunnel FTP site. If I go in with Filezilla in passive mode, I can do a directory listing, but the directory is empty. If I use the browser by clicking on the FTP link on the stunnel web page, I get an error 550 Failed to change directory. I was able to access the European site, however. Enjoy the day. -- Attention: This message and all attachments are private and may contain information that is confidential and privileged. If you received this message in error, please notify the sender by reply email and delete the message immediately.

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IP Address on hte Destination
by Stewart Anderson 03 Oct '13

03 Oct '13

Hi, When a source address connects to a remote destination, via stunnel, what IP address is visible to the destination as the source address? The address of the source or the host where stunnel is running? I see some settings for transparency but I just have a plain connect= for my services. My source and stunnel are on different servers. Cheers Stu This message is confidential. It may also contain privileged information. The contents of this e-mail and any attachments are intended for the named addressee only. Unless you are the named addressee or authorised to receive the e-mail of the named addressee you may not disclose, use or copy the contents of the e-mail. If you are not the person for whom the message was intended, please notify the sender immediately at Bradford Teaching Hospitals NHS Foundation Trust and delete the material from your computer. You must not use the message for any other purpose, nor disclose its contents to any person other than the intended recipient. Bradford Teaching Hospitals NHS Foundation Trust does not accept responsibility for this message and any views or opinions contained in this e-mail are solely those of the author unless expressly stated otherwise.

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Issue with TCPmon and Stunnel
by Odays 01 Oct '13

01 Oct '13

Hi all. I need to configure TCPMon+Stunnel to capture the request/response message in the communication with a web services using https. So I download stunnel-4.56-installer.exe and install it. In TCPMon I put that it listen in port 7777 and redirect to port 1234. In Stunnel I put this configuration: client=yes verify=0 [my-https] accept = 127.0.0.1:1234 connect = webservices_server:443 TIMEOUTclose = 0 When i run the scenario I see this log: 2013.09.30 16:12:57 LOG7[8612:6032]: Service [my-https] started 2013.09.30 16:12:57 LOG5[8612:6032]: Service [my-https] accepted connection from 127.0.0.1:51759 2013.09.30 16:12:57 LOG7[8612:6032]: SSL state (accept): before/accept initialization *2013.09.30 16:12:57 LOG3[8612:6032]: SSL_accept: 1407609C: error:1407609C:SSL routines:SSL23_GET_CLIENT_HELLO:http request* 2013.09.30 16:12:57 LOG5[8612:6032]: Connection reset: 0 byte(s) sent to SSL, 0 byte(s) sent to socket 2013.09.30 16:12:57 LOG7[8612:6032]: Local socket (FD=448) closed 2013.09.30 16:12:57 LOG7[8612:6032]: Service [my-https] finished (0 left) Any idea about this error? Thanks. -- Este mensaje le ha llegado mediante el servicio de correo electronico que ofrece Infomed para respaldar el cumplimiento de las misiones del Sistema Nacional de Salud. La persona que envia este correo asume el compromiso de usar el servicio a tales fines y cumplir con las regulaciones establecidas Infomed: http://www.sld.cu/

3 2

Generic/general mechanism to forward mail servername, login, port from client to stunnel
by Ben Stover 27 Sep '13

27 Sep '13

Refering to my last posting I want to ask a related question: I read in the past somewhere that I can access stunnel from my local email client in more generic way: At first: stunnel always listens AUTOMATICALLY by default on port 127.0.0.1:9999 für incoming request and forwards the prepared/modified request to the outside world. The core parameter are NOT specified in the .conf file but by the User ID which is passed by the local client to local stunnel service. The syntax is as follows: userid=<servername>/<remotes-ssl-tls-port>/<loginname> Example: userid=pop.mail.yahoo.com/995/myname123 So as soon as stunnel receives at 127.0.0.1:9999 an incoming local connect he accepts the following userid string and tokenize it into the three parts. Given these three tokens stunnel is able to connect in the second step the remote mail server WITHOUT any further need of specification in the .conf file. Do I remember this correct? Is this mechanism described somewhere in detail? Thank you Ben

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PATCH: multiple SNI options per slave section
by David Owen 27 Sep '13

27 Sep '13

Hello and thank you for stunnel! After switching from my web-server's built-in SSL support, I now have a much more secure system and SNI, too! In stunnel(8), I read this about the sni option: "sni option can also be specified more than once within a single slave service." However, I couldn't get it to work, and reading the source code verified that only one sni option is tracked per section. So, I present my patch to allow multiple sni options. It enables configurations like these: [https] ... [group1] sni = https:a.example.org sni = https:b.example.org ... [group2] sni = https:c.example.org sni = https:d.example.org ... If you have a naming scheme that doesn't lend itself to the wildcard matching already supported, this can cut your config size quite a bit. DETAILS The sni option for any section was originally tracked in the section->sni member (a string). Now, a linked-list of sni options is added to the section structure, with every sni option being appended to the end. For server setup, each slave section walks over its list, splitting each sni option and adding that slave section to the master's slave list. Splitting options and adding slaves to masters works as before, but now the slave section iterates over a list instead of referencing a single string. For client setup, each slave section checks that it has either no sni options, or exactly one. Multiple sni options results in an error. If exactly one option is found, it is copied to the old sni field of the section struct. The old sni field has been renamed to servername_to_request, as it is now used only in client mode, and this makes its purpose more clear. When no sni option is found, servername_to_request is initialized from the protocolHost or connect options, as before. I hope this patch is useful to others. Please let me know how I can make it acceptable for inclusing in the stunnel distribution. Thanks, David

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Proxy HTTPS via stunnel without any certificates on proxy/stunnel box
by Gary Chodos 25 Sep '13

25 Sep '13

Greetings, We are trying to decide between SNIProxy and stunnel for the following task: - Client browser hits https://foo.bar.org, which resolves to an IP that corresponds to the stunnel machine listening on 443. - stunnel "forwards" (sorry if this is not the correct technical term) the connection to a different machine, specified by a different IP address, which is also configured to believe it is foo.bar.org and actually has a web server listening on 443 and houses the SSL key/cert. - when stunnel hits the end server, the latter sees the stunnel IP address as source, not the original user's (who initiated the web request for https://foo.bar.org). I believe this is default behavior, but just noting it for completeness. Is it possible to accomplish this (stunnel listening on and connecting to https endpoints) without housing any certs/keys on the stunnel machine itself, because we want the second server to deal with all that and we do not have access to those keys anyway. And of course, the users which go to the https://foo.bar.org should not see any cert mismatches as a result of loading https://foo.bar.org which, for the user, will resolve to the stunnel/proxy IP, rather than the end server which actually had a running web server and keys/cert. Sorry if the above detail is insufficient; do let me know. Thanks for your help. Gary

2 2

Port assignment in .conf file for local email client unique?
by Ben Stover 25 Sep '13

25 Sep '13

Assume I want to connect from my local email client to two (!) remote email servers The corresponding instructions in .conf file looks like (my guess): [smtps-firstacct] accept = 127.0.0.1:259 connect = smtps.myisp1.com:465 [smtps-secondacct] accept = 127.0.0.1:259 connect = smtps.myisp2.com:465 Questions: 1.) a configuration like above with the same "accept" port 259 is NOT possible because stunnel does not know to which remote email server he has to connect. To distinguish two different remote email server I always have to select TWO different accept-ports like [smtps-firstacct] accept = 127.0.0.1:259 connect = smtps.myisp1.com:465 [smtps-secondacct] accept = 127.0.0.1:258 connect = smtps.myisp2.com:465 Correct? 2.) Can I use arbitrary accept-ports like 1242 or 23199 or is there a port range from I have to select one? 3.) Moreover assume I want to make the SSL connection transparent can I select an accept-port 25? 4.) I read somewhere that I have always to specify in email client for POP3/SMTP an address 127.0.0.1:9999 and NOT 127.0.0.1:259 in order to connect to local stunnel service. Because local stunnel service is always listening on port 9999. Is this correct? Thank you Ben

2 2

One "client=yes" instruction per .conf file sufficient?
by Ben Stover 25 Sep '13

25 Sep '13

Is one client=yes instruction line per conf file enough? Does is mean all instructions in current .conf file belong to a client configuration or does it mean only the following command (=lines below) are intended for client usage? Ben

2 1

postgres protocol
by Robert Bernier 21 Sep '13

21 Sep '13

Hi, I've been looking at using stunnel connecting it directly to postgres. As per the man page, https://www.stunnel.org/static/stunnel.html, I was able to get postgres version 8.3 working. However, I've not suceeded using postgres version 9.2. Any insights would be appreciated. Thanks -- Robert Bernier PostgreSQL Business Intelligence Analyst robert7390(a)comcast.net http://www.linkedin.com/pub/robert-bernier/69/6a6/921 http://beknown.com/robert-bernier

1 0

Difference between verify=2, 3 and 4
by Nikolaus Rath 20 Sep '13

20 Sep '13

Hello, Thanks for writing stunnel, it looks like a great tool! I have, however, a really hard time understanding the difference between verify=2,3 and 4. In the manpage, I found verify = level verify peer certificate level 0 - request and ignore peer certificate level 1 - verify peer certificate if present level 2 - verify peer certificate level 3 - verify peer with locally installed certificate level 4 - ignore CA chain and only verify peer certificate default - no verify Levels 0-2 seem pretty clear cut, but then it becomes confusing for me. First, I do not understand how level 3 differs from level2. What does "against a locally installed certificate" mean? It seems to me that I certainly need to have a local copy of the trusted CAs even in level 2 -- at least I hope that they aren't somehow build in to stunnel. But there is also just one CApath option, so will that be used for level 2 or level 3? For level 4, the "ignore the CA chain" path is fine -- but where do I put the peer certificates that I'm willing to accept? CApath seems wrong, but cert is already used for the server's own certificate... Best, -Nikolaus -- »Time flies like an arrow, fruit flies like a Banana.« PGP fingerprint: 5B93 61F8 4EA2 E279 ABF6 02CF A9AD B7F8 AE4E 425C

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Looking for a tech talk speaker on Secure Networking
by Chris Westin 16 Sep '13

16 Sep '13

I organize the speakers for the SF Bay Area Large-Scale Production Engineering meetup (http://www.meetup.com/SF-Bay-Area-Large-Scale-Production-Engineering/ ; take a look at the "PAST" tab to see the kinds of events we've had). For our event on Thursday October 17, 2013, I'm looking for speakers on the topic of "Secure Networking" (event: http://www.meetup.com/SF-Bay-Area-Large-Scale-Production-Engineering/events… ). As you can see from looking at our past events, I pick a topic, and then try to get 2-3 talks on that topic. Talks are usually 20-25 minutes long. This is a technical audience, and they don't appreciate a marketing pitch. They're eager to get into the nuts and bolts of the topic, including demos, code samples, and architecture. If you're going to be in the Bay Area then, and would be interested in giving a talk, please let me know here, or (preferably) through meetup.com. Thanks, Chris Westin

1 0

Re: [stunnel-users] IRC-Reconnect failed with "[10053] Software caused connection abort"(mIRC) and "SSL_connect: Peer suddenly disconnected"(tstunnel.exe)
by ralf29587＠gmx.de 13 Sep '13

13 Sep '13

Could some admin please remove my uploaded VCard and either my Name or my E-Mail-Adress shown on stunnel.org ?? Thanks a million!

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stunnel accept a t3 connection?
by Scott Sikorski 10 Sep '13

10 Sep '13

I am curious if stunnel can support listening for an incoming t3 connection? I am having difficulty getting t3s to work between WebSphere and WebLogic for API calls and am curious if an alternative such as stunnel will work. I have stunnel installed betwen a client and the destination host, but the client doesn't seem to want to accept a t3://127.0.0.1:14010 connection but when I change this to http://127.0.0.1:14010 it works fine. Anything you can share would be appreciated. Mostly, if it will never work, that would be nice to know as to not spend more time troubleshooting. Best Regards, Scott Sikorski scottgsikorski(a)yahoo.com

2 1

Fullduplex in stunnel
by Krzysztof Kwiatkowski 07 Sep '13

07 Sep '13

Hi, I'm planning to use stunnel to do stress testing of my application. I decided to use stunnel because I've noticed that full-duplex has been added to version 3.2 (around 1999) and my application handles high throughput. AFAIK Stunnel uses openssl. Also I know that openssl doesn't handle fullduplex traffic very well. In fact without any tricks, half-duplex is most what I could get from openssl. As the full-duplex feature has been added to stunnel in 1999 (so long time ago) can you confirm that it is still there and full-duplex is still supported? If it is a case, how it is possible that stunnel handles fullduplex? Krzysztof Kwiatkowski

2 1

IRC-Reconnect failed with "[10053] Software caused connection abort"(mIRC) and "SSL_connect: Peer suddenly disconnected"(tstunnel.exe)
by ralf29587＠gmx.de 03 Sep '13

03 Sep '13

Hi, I have a problem using stunnel with mIRC: I was using a pretty old version of stunnel.exe that was packed with a mIRC script and could be ran as a command-line-only application without a configuration file (supplying all necessary informations parameters). I know that current mIRC version have their own ssl support, but I prefer an old version without because it has much better performance. The old one was used by "stunnel.exe -c -d localhost:<localport> -r <irc-server-ip>:<irc-server-port>" in command line and "/server localhost:<localport>" in irc. A few of my servers stopped supporting an old ssl version, this old stunnel.exe is no longer compatible to the new (open)ssl dll files and so I had to upgrade to the most recent version of stunnel - and I have some problems make it run properly. Here you can see my configuration file (stunnel.conf): ; Sample stunnel configuration file for Win32 by Michal Trojnara 2002-2012 ; Some options used here may be inadequate for your particular configuration ; This sample file does *not* represent stunnel.conf defaults ; Please consult the manual for detailed description of available options ; ************************************************************************** ; * Global options * ; ************************************************************************** ; Debugging stuff (may useful for troubleshooting) ;debug = 7 ;output = stunnel.log ; Disable FIPS mode to allow non-approved protocols and algorithms ;fips = no ; ************************************************************************** ; * Service defaults may also be specified in individual service sections * ; ************************************************************************** ; Certificate/key is needed in server mode and optional in client mode ;cert = stunnel.pem ;key = stunnel.pem ; Authentication stuff needs to be configured to prevent MITM attacks ; It is not enabled by default! ;verify = 2 ; Don't forget to c_rehash CApath ;CApath = certs ; It's often easier to use CAfile ;CAfile = certs.pem ; Don't forget to c_rehash CRLpath ;CRLpath = crls ; Alternatively CRLfile can be used ;CRLfile = crls.pem ; Disable support for insecure SSLv2 protocol options = NO_SSLv2 ; Workaround for Eudora bug ;options = DONT_INSERT_EMPTY_FRAGMENTS ; These options provide additional security at some performance degradation ;options = SINGLE_ECDH_USE ;options = SINGLE_DH_USE ; ************************************************************************** ; * Service definitions (at least one service has to be defined) * ; ************************************************************************** ; Example SSL server mode services ;[pop3s] ;accept = 995 ;connect = 110 ;[imaps] ;accept = 993 ;connect = 143 ;[ssmtp] ;accept = 465 ;connect = 25 ; Example SSL client mode services ;[gmail-pop3] ;client = yes ;accept = 127.0.0.1:110 ;connect = pop.gmail.com:995 ;[gmail-imap] ;client = yes ;accept = 127.0.0.1:143 ;connect = imap.gmail.com:993 ;[gmail-smtp] ;client = yes ;accept = 127.0.0.1:25 ;connect = smtp.gmail.com:465 ; Example SSL front-end to a web server ;[https] ;accept = 443 ;connect = 80 ; "TIMEOUTclose = 0" is a workaround for a design flaw in Microsoft SSL ; Microsoft implementations do not use SSL close-notify alert and thus ; they are vulnerable to truncation attacks ;TIMEOUTclose = 0 ; vim:ft=dosini [abjects] client = yes accept = 127.0.0.1:7001 connect = irc.abjects.net:9999 [Elite-IRC] client = yes accept = 127.0.0.1:7002 connect = SpeedSpace-IRC.eu:6697 [BodenTruppe] client = yes accept = 127.0.0.1:7003 connect = boden-truppe.zapto.org:7001 [LinkNet] client = yes accept = 127.0.0.1:7004 connect = irc.link-net.nl:7000 The first connect always works properly (as shown in the log below): 2013.09.03 12:30:45 LOG5[10696:9140]: stunnel 4.56 on x86-pc-msvc-1500 platform 2013.09.03 12:30:45 LOG5[10696:9140]: Compiled/running with OpenSSL 1.0.1e-fips11 Feb 2013 2013.09.03 12:30:45 LOG5[10696:9140]: Threading:WIN32 Sockets:SELECT,IPv6 SSL:ENGINE,OCSP,FIPS 2013.09.03 12:30:45 LOG5[10696:9140]: Reading configuration from file stunnel.conf 2013.09.03 12:30:45 LOG5[10696:9140]: FIPS mode is enabled 2013.09.03 12:30:45 LOG5[10696:9140]: Configuration successful 2013.09.03 12:30:53 LOG5[10696:10756]: Service [abjects] accepted connection from 127.0.0.1:3397 2013.09.03 12:30:53 LOG5[10696:10756]: connect_blocking: connected 188.126.73.62:9999 2013.09.03 12:30:53 LOG5[10696:10756]: Service [abjects] connected remote server from 192.168.1.10:3398 2013.09.03 12:30:54 LOG5[10696:14396]: Service [LinkNet] accepted connection from 127.0.0.1:3399 2013.09.03 12:30:54 LOG5[10696:14396]: connect_blocking: connected 194.126.217.98:7000 2013.09.03 12:30:54 LOG5[10696:14396]: Service [LinkNet] connected remote server from 192.168.1.10:3400 2013.09.03 12:30:54 LOG5[10696:2916]: Service [BodenTruppe] accepted connectionfrom 127.0.0.1:3401 2013.09.03 12:30:54 LOG5[10696:2916]: connect_blocking: connected 178.254.22.94:7001 2013.09.03 12:30:54 LOG5[10696:2916]: Service [BodenTruppe] connected remote server from 192.168.1.10:3402 2013.09.03 12:30:54 LOG5[10696:12260]: Service [Elite-IRC] accepted connection from 127.0.0.1:3403 2013.09.03 12:30:54 LOG5[10696:12260]: connect_blocking: connected 62.75.235.122:6697 2013.09.03 12:30:54 LOG5[10696:12260]: Service [Elite-IRC] connected remote server from 192.168.1.10:3404 But when I try to reconnect, it doesn't work for 2 of my 4 servers This is an example for what happens to Elite-IRC: 2013.09.03 12:32:22 LOG5[10696:12260]: Connection closed: 1972 byte(s) sent to SSL, 26903 byte(s) sent to socket 2013.09.03 12:32:23 LOG5[10696:17168]: Service [Elite-IRC] accepted connection from 127.0.0.1:3429 2013.09.03 12:32:23 LOG5[10696:17168]: connect_blocking: connected 62.75.235.122:6697 2013.09.03 12:32:23 LOG5[10696:17168]: Service [Elite-IRC] connected remote server from 192.168.1.10:3430 2013.09.03 12:32:23 LOG3[10696:17168]: SSL_connect: Peer suddenly disconnected 2013.09.03 12:32:23 LOG5[10696:17168]: Connection reset: 0 byte(s) sent to SSL,0 byte(s) sent to socket The frist line shows the manual disconnect occured by executing "/server localhost:7002" in mIRC. The second line shows the new incoming connection from my mIRC. The third line? ... I got no clue why it has to block anything. The fourth line: Successfully connected to IRC-Server? And then the fifth line occurs. I'm not sure if I interpret it right, but for some reason tstunnel.exe is kicking out my connected mIRC client which makes mIRC to tell me "[10053] Software caused connection abort". The whole lines in mIRC are: [12:34pm] * Connect retry #1 localhost (7003) ------------------------------------------------------------ [12:34pm] * [10053] Software caused connection abort ------------------------------------------------------------ [12:34pm] * Disconnected By the way, I have packed libeay32.dll, ssleay32.dll, stunnel.conf and tstunnel.exe in a subdir in mIRC directory and I'm starting it using "tstunnel.exe stunnel.conf" When this error occurs, I have to kill tstunnel.exe and start it again - then everything works fine again. For 1 of 4 servers, I also had this error with the old command-line stunnel.exe and I just wrote a script killing (only this) stunnel.exe and restarting it when this mIRC error occurs. Unfortunately this is no longer possible when tstunnel.exe is using a configuration file and one process is managing all connections. Is there any way I can fix this? (Maybe by fixing the logout of my local mIRC from my local tstunnel.exe?) Best regards

2 1

stunnel 4.56 to 4.50 on andriod
by Ronald Ning 03 Sep '13

03 Sep '13

Anyone have any luck running stunnel on android? I'm running the stock JB 4.2.2. I've tried every stunnel version from 4.50 to 4.56. When I try to run: root@andriod: /system/bin/stunnel stunnel.conf -> stunnel root@andriod: netstat -a netstat doesn't show the listening port: My stunnel.conf is this: client = yes debug = 7 [ssh] accept=2222 connect=myserver.com:22

2 1

Init script
by Alan Chester 29 Aug '13

29 Aug '13

Hello, I am currently working on using stunnel. I was wondering what everyones thoughts were on the creation of an init script for stunnel. This would help insure that the connections are brought up after a reboot. Or what is the best way to go about handling this? Thanks, Alan

2 1

no certificate available safari browser
by Scott McKeown 28 Aug '13

28 Aug '13

Hi Libin, If possible can you send over your STunnel config file but my guess would be that you would need to include your Root CA and Intermediate CA certificates into your PEM file. I would check to see what https://www.ssllabs.com/ssltest/analyze.html says about your certificates another quick test would be to have a look at http://www.digicert.com/help/ to see what they also say about the certificate chains. ~Scott Hi all, > > Sever OS: Linux/Centos 5.9 > SSLServer: Stunnel > ErrorMessage: no certificate available > CertType: SSL Web Server Certificate > Client Browser: Safari 5.1. > Client OS: OS X Lion > > When i am trying to hit the URL on safari browser it shows me the messages > "no certificate available" > No certificate meet the application . However, the same link is working > for all other browsers. Moreover, we have checked the stunnel logs, but > couldn't able to get any thing from the logs. > > Apache HTTPS config we have option *SSLVerifyClient none *in Stunnel I > have tried all option non of thing working. > * > * > Please help me.* * > > Thanks > Libin -- With Kind Regards. Scott McKeown Loadbalancer.org http://www.loadbalancer.org

3 2

stunnel 4.56 and 4.55 are not working on Android 4.3.1
by Mohsin Mirza 28 Aug '13

28 Aug '13

I tried both version of stunnel for android on Nexus 4 Build JWR66Y, Is it have to anything to do with SELinux or MAC secuirty model introduce by 4.3 It was working in initial 4.3 build OTA. root@mako:/system/bin # ./sh -c /system/xbin/stunnel root@mako:/system/bin # ________________________________________Disclaimer: This email and any attachments may contain confidential and/or privileged information. If you are not the intended recipient (or have received this e-mail in error) please notify the sender immediately by email and destroy this email. Any unauthorized copying, dissemination, disclosure or distribution of the material in this email is strictly forbidden. Unless expressly stated to the contrary, the sender of this email is not authorized by MBC to make any representations, negotiations or enter into any agreement on behalf of MBC. This e-mail message and any attached files have been scanned for the presence of computer viruses. However, it is the responsibility of the recipient to ensure that it is virus free; we accept no responsibility for any loss or damage arising in any way from its use.________________________________________

1 0

no certificate available safari browser
by Libindas 27 Aug '13

27 Aug '13

Hi Michal, Sever OS: Linux/Centos 5.9 SSLServer: Stunnel ErrorMessage: no certificate available CertType: SSL Web Server Certificate Client Browser: Safari 5.1. Client OS: OS X Lion When i am trying to hit the URL on safari browser it shows me the messages "no certificate available" No certificate meet the application . However, the same link is working for all other browsers. Moreover, we have checked the stunnel logs, but couldn't able to get any thing from the logs. Apache HTTPS config we have option *SSLVerifyClient none *in Stunnel I have tried all option non of thing working. * * Please help me.* * Thanks Libin

1 1

Re: [stunnel-users] Build failure for ARM32 with Yocto
by Ludolf Holzheid 23 Aug '13

23 Aug '13

On Thu, 2013-08-22 15:44:43 +0100, Laszlo Papp wrote: > On Thu, Aug 22, 2013 at 3:34 PM, Ludolf Holzheid < > lholzheid(a)bihl-wiedemann.de> wrote: > > > On Thu, 2013-08-22 14:43:55 +0100, Laszlo Papp wrote: > > > Here you can find the log file in question for details: > > > > > > [..] > > > > > > In file included from /usr//include/features.h:324:0, > > > from /usr//include/pthread.h:23, > > > from common.h:158, > > > from str.c:38: > > > > > /home/lpapp/Projects/Yocto/poky-dylan-9.0.1/build/tmp/sysroots/foo/usr/include/bits/predefs.h:23:3: > > > error: #error "Never use <bits/predefs.h> directly; include > > <stdc-predef.h> > > > > Laszlo, > > > > Are you sure /usr//include is the right include directory for cross- > > compiling? I must confess, I'm not familiar with cross-compiling, but > > this looks fishy. > > > > Most certainly not, but other softwares get it right. I will assume that it > has something to do with how the Makefile is generated for stunnel. Got a > clue in that area? I would try to remove -I/usr//include (and -pedantic) from the compiler flags, but again, I'm no expert in autoconf and cross-compiling. Ludolf -- Bihl+Wiedemann GmbH Floßwörthstraße 41 68199 Mannheim, Germany Tel: +49 621 33996-0 Fax: +49 621 3392239 mailto:lholzheid@bihl-wiedemann.de http://www.bihl-wiedemann.de Sitz der Gesellschaft: Mannheim Geschäftsführer: Jochen Bihl, Bernhard Wiedemann Amtsgericht Mannheim, HRB 5796

3 3

REMOVE
by Bruce Edwards 22 Aug '13

22 Aug '13

Please remove me from your list server R. Bruce Edwards Communications Manager 1018 Pretlow St Franklin, VA 23851 bedwards(a)franklinpolice.org Office: 757-562-8696 Cell: 757-621-5295

1 0

Build failure for ARM32 with Yocto
by Laszlo Papp 22 Aug '13

22 Aug '13

Hi, if I build stunnel manually on my desktop machine (Archlinux), it works fine. However, when I am trying to use a Yocto/OE recipe for building it for my arm32 target, I am facing the issue below. Anyone any hint? Cheers, L. | /usr//include/linux/sysctl.h:836:20: warning: comma at end of enumerator list [-pedantic] | /usr//include/linux/sysctl.h:849:12: warning: comma at end of enumerator list [-pedantic] | /usr//include/linux/sysctl.h:892:31: warning: comma at end of enumerator list [-pedantic] | /usr//include/linux/sysctl.h:897:32: warning: comma at end of enumerator list [-pedantic] | /usr//include/linux/sysctl.h:912:26: warning: comma at end of enumerator list [-pedantic] | /usr//include/linux/sysctl.h:917:32: warning: comma at end of enumerator list [-pedantic] | /usr//include/linux/sysctl.h:928:20: warning: comma at end of enumerator list [-pedantic] | In file included from /usr//include/linux/netfilter_ipv4.h:8:0, | from common.h:383, | from network.c:38: | /usr//include/linux/netfilter.h:58:18: warning: comma at end of enumerator list [-pedantic] | In file included from common.h:383:0, | from network.c:38: | /usr//include/linux/netfilter_ipv4.h:68:26: warning: comma at end of enumerator list [-pedantic] | make[2]: *** [stunnel-str.o] Error 1 | make[2]: *** Waiting for unfinished jobs.... | make[2]: *** [stunnel-network.o] Error 1 | make[2]: *** [stunnel-resolver.o] Error 1 | make[2]: *** [stunnel-protocol.o] Error 1 | make[2]: *** [stunnel-log.o] Error 1 | make[2]: *** [stunnel-file.o] Error 1 | make[2]: *** [stunnel-options.o] Error 1 | make[2]: *** [stunnel-client.o] Error 1 | make[2]: Leaving directory `/home/lpapp/Projects/Yocto/poky-dylan-9.0.1/build/tmp/work/armv5te-linux-gnueabi/stunnel/4.56-r0/stunnel-4.56/src' | make[1]: *** [all] Error 2 | make[1]: Leaving directory `/home/lpapp/Projects/Yocto/poky-dylan-9.0.1/build/tmp/work/armv5te-linux-gnueabi/stunnel/4.56-r0/stunnel-4.56/src' | make: *** [all-recursive] Error 1 | ERROR: oe_runmake failed | ERROR: Function failed: do_compile (see /home/lpapp/Projects/Yocto/poky-dylan-9.0.1/build/tmp/work/armv5te-linux-gnueabi/stunnel/4.56-r0/temp/log.do_compile.10590 for further information) ERROR: Task 6 (/home/lpapp/Projects/Yocto/poky-dylan-9.0.1/build/../meta-networking/recipes-support/stunnel/ stunnel_4.56.bb, do_compile) failed with exit code '1' NOTE: Tasks Summary: Attempted 561 tasks of which 559 didn't need to be rerun and 1 failed. No currently running tasks (561 of 568) Summary: 1 task failed: /home/lpapp/Projects/Yocto/poky-dylan-9.0.1/build/../meta-networking/recipes-support/stunnel/ stunnel_4.56.bb, do_compile Summary: There was 1 ERROR message shown, returning a non-zero exit code.

2 3

Problem Selecting Only Ecliptic Curve Ciphers
by Carter Browne 07 Aug '13

07 Aug '13

I'm using stunnel 4.56 on Windows 7. When I use the following cipher list: ciphers = ECDHE-ECDSA-AES256-SHA:ECDH-ECDSA-AES256-SHA:ECDHE-ECDSA-AES128-SHA:ECDH-ECDSA-AES128-SHA to establish a connection, I get a "no shared cipher" response. The following set of ciphers does work: ciphers = ECDHE-RSA-AES256-SHA:ECDHE-ECDSA-AES256-SHA:ECDH-RSA-AES256-SHA:ECDH-ECDSA-AES256-SHA:ECDHE-RSA-AES128-SHA:ECDHE-ECDSA-AES128-SHA:ECDH-RSA-AES128-SHA:ECDH-ECDSA-AES128-SHA Other relevant settings: options = NO_SSLv2 sslVersion = all fips = no verify = 2 If I take out the first ECDHE-RSA-ASE256-SHA cipher from the list, the ECDHE-RSA-AES128-SHA cipher is selected. What am I doing wrong? Thanks. -- Carter Browne cbrowne(a)cbcs-usa.com

2 1

Unable to make SSL connexion work
by OLIVER Patrice 07 Aug '13

07 Aug '13

Hi, Since our company had to migrate to Orange Office365 platform, we cannot send simple SMTP message using smtp.office365.com We have to use SMTP over TLS. While I have to use some applications which cannot use SMTP, I installed and setup STunnel. When I try to send a simple mail like this : telnet myserver 25 ehlo ch-lepuy.fr mail from: toto(a)ch-lepuy.fr I cannot continue with rcpt to syntax and I have the following message : rcpt to:530 5.7.1 Client was not authenticated In the STunnel log file, I can see that : 2013.08.06 19:20:49 LOG7[1352:2832]: SSL state (connect): before/connect initialization 2013.08.06 19:20:49 LOG7[1352:2832]: SSL state (connect): SSLv3 write client hello A 2013.08.06 19:20:50 LOG7[1352:2832]: SSL state (connect): SSLv3 read server hello A 2013.08.06 19:20:50 LOG7[1352:2832]: SSL state (connect): SSLv3 read server certificate A 2013.08.06 19:20:50 LOG7[1352:2832]: SSL state (connect): SSLv3 read server key exchange A 2013.08.06 19:20:50 LOG7[1352:2832]: SSL state (connect): SSLv3 read server certificate request A 2013.08.06 19:20:50 LOG7[1352:2832]: SSL state (connect): SSLv3 read server done A 2013.08.06 19:20:50 LOG7[1352:2832]: SSL state (connect): SSLv3 write client certificate A 2013.08.06 19:20:50 LOG7[1352:2832]: SSL state (connect): SSLv3 write client key exchange A 2013.08.06 19:20:50 LOG7[1352:2832]: SSL state (connect): SSLv3 write certificate verify A 2013.08.06 19:20:50 LOG7[1352:2832]: SSL state (connect): SSLv3 write change cipher spec A 2013.08.06 19:20:50 LOG7[1352:2832]: SSL state (connect): SSLv3 write finished A 2013.08.06 19:20:50 LOG7[1352:2832]: SSL state (connect): SSLv3 flush data 2013.08.06 19:20:50 LOG7[1352:2832]: SSL state (connect): SSLv3 read finished A 2013.08.06 19:20:50 LOG7[1352:2832]: 1 items in the session cache 2013.08.06 19:20:50 LOG7[1352:2832]: 1 client connects (SSL_connect()) 2013.08.06 19:20:50 LOG7[1352:2832]: 1 client connects that finished 2013.08.06 19:20:50 LOG7[1352:2832]: 0 client renegotiations requested 2013.08.06 19:20:50 LOG7[1352:2832]: 0 server connects (SSL_accept()) 2013.08.06 19:20:50 LOG7[1352:2832]: 0 server connects that finished 2013.08.06 19:20:50 LOG7[1352:2832]: 0 server renegotiations requested 2013.08.06 19:20:50 LOG7[1352:2832]: 0 session cache hits 2013.08.06 19:20:50 LOG7[1352:2832]: 0 external session cache hits 2013.08.06 19:20:50 LOG7[1352:2832]: 0 session cache misses 2013.08.06 19:20:50 LOG7[1352:2832]: 0 session cache timeouts 2013.08.06 19:20:50 LOG7[1352:2832]: Peer certificate was cached (6184 bytes) 2013.08.06 19:20:50 LOG6[1352:2832]: SSL connected: new session negotiated 2013.08.06 19:20:50 LOG6[1352:2832]: Negotiated TLSv1/SSLv3 ciphersuite: ECDHE-RSA-AES256-SHA (256-bit encryption) 2013.08.06 19:20:50 LOG6[1352:2832]: Compression: null, expansion: null 2013.08.06 19:21:13 LOG3[1352:2832]: SSL_read: Connection reset by peer (WSAECONNRESET) (10054) 2013.08.06 19:21:13 LOG5[1352:2832]: Connection reset: 65 byte(s) sent to SSL, 231 byte(s) sent to socket 2013.08.06 19:21:13 LOG7[1352:2832]: Remote socket (FD=316) closed 2013.08.06 19:21:13 LOG7[1352:2832]: Local socket (FD=244) closed 2013.08.06 19:21:13 LOG7[1352:2832]: Service [SMTP Outgoing] finished (0 left) Here is my STunnel setup : client = yes output = stunnel-log.txt debug = 7 taskbar = yes ; Disable FIPS mode to allow non-approved protocols and algorithms ;fips = no ; ************************************************************************** ; * Service defaults may also be specified in individual service sections * ; ************************************************************************** ; Certificate/key is needed in server mode and optional in client mode cert = stunnel.pem ; Disable support for insecure SSLv2 protocol options = NO_SSLv2 [SMTP Outgoing] protocol = smtp accept = 25 connect = smtp.office365.com:587 Does anyone have an idea ? Regards? Patrice Oliver | Centre Hospitalier Emile Roux Responsable Informatique T. 04 71 04 38 30 12 Bd Andr? Chantemesse - 43012 LE PUY EN VELAY Cedex http://www.ch-lepuy.fr

3 3

Disable SSL session ticket
by dansmith 06 Aug '13

06 Aug '13

Hi, when connecting a stunnel client to a stunnel server, is it possible to disable the use of SSL session tickets? I need to be able to decrypt the stunnel traffic in wireshark. Unfortunately, wireshark still doesn't support SSL session tickets.

2 1

transparent = source, not working
by Ruben Cardenal 04 Aug '13

04 Aug '13

Hi, I'm trying to setup yet another service of this kind. I've seen this has been largely discussed several times on this list (but without valid solutions), and I'm writting this email as some kind of last resort after hours of testing and debugging. Pretty simple configuration: # cat /etc/stunnel/stunnel.conf cert = /etc/ssl/certs/stunnel4/my-cert.crt key = /etc/ssl/certs/stunnel4/my-cert.key sslVersion = SSLv3 foreground = yes pid = /tmp/stunnel4.pid socket = l:TCP_NODELAY=1 socket = r:TCP_NODELAY=1 debug = 7 output = /var/log/stunnel.log [service] accept = 195.78.X.X:6697 connect = 195.78.X.X:1357 transparent = source Accept and connect IP's are the same. # /usr/local/bin/stunnel -version stunnel 4.56 on i686-pc-linux-gnu platform Compiled/running with OpenSSL 0.9.8o 01 Jun 2010 Threading:PTHREAD Sockets:POLL,IPv6 SSL:ENGINE,OCSP Global options: debug = daemon.notice pid = /usr/local/var/run/stunnel/stunnel.pid RNDbytes = 64 RNDfile = /dev/urandom RNDoverwrite = yes Service-level options: ciphers = ALL:!SSLv2:!aNULL:!EXP:!LOW:-MEDIUM:RC4:+HIGH curve = prime256v1 sessionCacheSize = 1000 sessionCacheTimeout = 300 seconds sslVersion = TLSv1 for client, all for server stack = 65536 bytes TIMEOUTbusy = 300 seconds TIMEOUTclose = 60 seconds TIMEOUTconnect = 10 seconds TIMEOUTidle = 43200 seconds verify = none # /usr/local/bin/stunnel -sockets stunnel 4.56 on i686-pc-linux-gnu platform Compiled/running with OpenSSL 0.9.8o 01 Jun 2010 Threading:PTHREAD Sockets:POLL,IPv6 SSL:ENGINE,OCSP Socket option defaults: Option Name | Accept | Local | Remote |OS default ----------------+----------+----------+----------+---------- SO_DEBUG | -- | -- | -- | no SO_DONTROUTE | -- | -- | -- | no SO_KEEPALIVE | -- | -- | -- | no SO_LINGER | -- | -- | -- | 0:0 SO_OOBINLINE | -- | -- | -- | no SO_RCVBUF | -- | -- | -- | 87380 SO_SNDBUF | -- | -- | -- | 65536 SO_RCVLOWAT | -- | -- | -- | 1 SO_SNDLOWAT | -- | -- | -- | 1 SO_RCVTIMEO | -- | -- | -- | 0:0 SO_SNDTIMEO | -- | -- | -- | 0:0 SO_REUSEADDR | yes| -- | -- | no SO_BINDTODEVICE | -- | -- | -- |write-only TCP_KEEPCNT | -- | -- | -- | 9 TCP_KEEPIDLE | -- | -- | -- | 7200 TCP_KEEPINTVL | -- | -- | -- | 75 IP_TOS | -- | -- | -- | 0 IP_TTL | -- | -- | -- | 64 TCP_NODELAY | -- | yes| yes| no IP_FREEBIND | -- | -- | -- | no And the timeout, the same I've seen suffering to other people: 2013.08.03 19:52:12 LOG7[18496:3074533056]: Service [service] accepted (FD=3) from MY_HOME_ADDRESS:34836 2013.08.03 19:52:12 LOG7[18496:3074530160]: Service [service] started 2013.08.03 19:52:12 LOG5[18496:3074530160]: Service [service] accepted connection from MY_HOME_ADDRESS:34836 (blah blah ssl stuff) 2013.08.03 19:52:12 LOG6[18496:3074530160]: Negotiated TLSv1/SSLv3 ciphersuite: DHE-RSA-AES256-SHA (256-bit encryption) 2013.08.03 19:52:12 LOG6[18496:3074530160]: Compression: null, expansion: null 2013.08.03 19:52:12 LOG6[18496:3074530160]: IP_TRANSPARENT socket option set 2013.08.03 19:52:12 LOG6[18496:3074530160]: local_bind succeeded on the original port 2013.08.03 19:52:12 LOG6[18496:3074530160]: connect_blocking: connecting 195.78.X.X:1357 2013.08.03 19:52:12 LOG7[18496:3074530160]: connect_blocking: s_poll_wait 195.78.X.X:1357: waiting 60 seconds 2013.08.03 19:52:21 LOG3[18496:3074530160]: connect_blocking: connect 195.78.X.X:1357: Connection timed out (110) 2013.08.03 19:52:21 LOG5[18496:3074530160]: Connection reset: 0 byte(s) sent to SSL, 0 byte(s) sent to socket iptables stuff and that, is in place: # cat /proc/sys/net/ipv4/conf/all/rp_filter 0 # cat /proc/sys/net/ipv4/ip_forward 1 And did the iptables part: iptables -t mangle -N DIVERT iptables -t mangle -A PREROUTING -p tcp -m socket -j DIVERT iptables -t mangle -A DIVERT -j MARK --set-mark 1 iptables -t mangle -A DIVERT -j ACCEPT ip rule add fwmark 1 lookup 100 ip route add local 0.0.0.0/0 dev lo table 100 Debugging the whole thing, it can be seen that stunnel tries to connect: [pid 16823] connect(9, {sa_family=AF_INET, sin_port=htons(1357), sin_addr=inet_addr("195.78.X.X")}, 16) = -1 EINPROGRESS (Operation now in progress) BUT the service running in 1357 does this: # tcpdump -i eth1 -n port 1357 tcpdump: verbose output suppressed, use -v or -vv for full protocol decode listening on eth1, link-type EN10MB (Ethernet), capture size 65535 bytes 19:52:52.586773 IP 195.78.X.X.1357 > MY_HOME_ADDRESS.34853: Flags [S.], seq 2655966098, ack 546202865, win 5840, options [mss 1460,nop,nop,sackOK], length 0 And, according to that, it looks obvious to me that this setup will never work, since that ACK packet goes to my home box, and not to the local connection. So either I'm doing something wrong (I hope I am!!) or this thing definitely doesn't work... Any help/ideas/whatever, please? Thanks, Rubén.

2 5

Library for iOS
by ios dev 29 Jul '13

29 Jul '13

Hi. I have to build static library for using in iOS application. Did anybody already built it? How can I do it? Thanks.

1 0

Reverse DNS lookup in stunnel log possible?
by mkanet＠yahoo.com 28 Jul '13

28 Jul '13

I currently have stunnel strip SSL from incoming https connections; which then passes the connections to a proxy before ultimately reaching my web server. So, the only easy way to see where incoming connections are coming from are in the stunnel log. Below, is a small example of what my stunnel log looks like (no, those arent the real IPs ). The information below would be much more useful to me if it included the DNS names in addition to their numeric IP. I currently have the latest Windows version of stunnel installed. It would be great to know how to get it to resolve DNS names as well in the log file; preferably without impeding general stunnel performance. I tried several debug levels; but none them did reverse DNS lookup. Hopefully someone know how to do this on a Windows stunnel setup. 2013.07.23 10:16:00 LOG5[10152:15136]: Service [stunnel-sslh] connected remote server from 24.12.152.129:58773 2013.07.23 10:16:00 LOG3[10152:15136]: SSL_read: Connection reset by peer (WSAECONNRESET) (10054) 2013.07.23 10:16:00 LOG5[10152:15136]: Connection reset: 272 byte(s) sent to SSL, 96 byte(s) sent to socket 2013.07.23 10:17:53 LOG5[10152:4000]: Service [stunnel-sslh] accepted connection from 71.194.51.232:5535 2013.07.23 10:17:53 LOG5[10152:4000]: connect_blocking: connected 24.12.152.129:7777 2013.07.23 10:17:53 LOG5[10152:4000]: Service [stunnel-sslh] connected remote server from 24.12.152.129:58799 2013.07.23 10:17:53 LOG5[10152:13212]: Service [stunnel-sslh] accepted connection from 71.194.51.232:5508 2013.07.23 10:17:53 LOG5[10152:3348]: Service [stunnel-sslh] accepted connection from 71.194.51.232:5509 2013.07.23 10:17:53 LOG5[10152:2884]: Service [stunnel-sslh] accepted connection from 71.194.51.232:5519

4 9

Re: [stunnel-users] Server down
by Ludolf Holzheid 24 Jul '13

24 Jul '13

On Wed, 2013-07-24 13:22:26 -0400, Walter Hankins wrote: > Hi Ludoff, > > I am new to stunnel. I trying to configure. > > Stunnel.conf: > socket = l: TCP_NODELAY = 1 > socket = r: TCP_NODELAY = 1 > > debug = 7 > output = stunnel.log Hi Walter, Always reply to the list, so others can comment. Your log says `Cannot open log file: stunnel.log´. I don't how you invoke stunnel, so I don't know if the directory it's working in is writable, but you may try to specify an output file in a writable directory with an absolute path, e.g. output=C:/stunnel.log if C:\ is writable on your box. HTH, Ludolf -- Bihl+Wiedemann GmbH Floßwörthstraße 41 68199 Mannheim, Germany Tel: +49 621 33996-0 Fax: +49 621 3392239 mailto:lholzheid@bihl-wiedemann.de http://www.bihl-wiedemann.de Sitz der Gesellschaft: Mannheim Geschäftsführer: Jochen Bihl, Bernhard Wiedemann Amtsgericht Mannheim, HRB 5796

1 0

Server down
by Walter Hankins 24 Jul '13

24 Jul '13

Server is down Reading configuration from file stunnel.conf FIPS mode is enabled Compression not enabled Snagged 64 random bytes from C:/.rnd Wrote 0 new random bytes to C:/.rnd PRNG seeded successfully Initializing service [Ssmtp] Certificate: stunnel.pem Certificate loaded Key file: stunnel.pem Private key loaded SSL options set: 0x01000004 Configuration successful Service [Ssmtp] (FD=672) bound to 127.0.0.1:25 Cannot open log file: stunnel.log Closing service [Ssmtp] Service [Ssmtp] closed (FD=672) Sessions cached before flush: 0 Sessions cached after flush: 0 Service [Ssmtp] closed Server is down

2 1

Re: [stunnel-users] stunnel and keepalive
by David H. Durgee 23 Jul '13

23 Jul '13

> `stunnel -sockets´ should show the available socket options and their > default values. > > For the box I'm writing this mail from, the default for TCP_KEEPIDLE > is 7200 and for TCP_KEEPINTVL 75 (both in seconds). You'll have to be > quite patient if you want to watch keepalive packets in wireshark > without tweaking the defaults ... > > HTH, > > Ludolf You hit the nail on the head. I set the parameters to something more reasonable and I now see the keepalive packets. Thank you for your speedy response. Dave

1 0

keepalive and stunnel
by David H. Durgee 23 Jul '13

23 Jul '13

I am attempting to use stunnel to provide secure telnet access to a server on my system. As it is possible that a user may be idle for long period I have attempted to enable keepalive with stunnel. My stunnel conf files contain: socket = l:SO_KEEPALIVE=1 socket = r:SO_KEEPALIVE=1 on both the server and client side. But wireshark shows no keepalive packets being exchanged. I am using socat to provide a service on the LAN and connections using socat do show keepalive packets. But to get this working with socat I had to use the following: socat -d -d -L/var/lock/Port$PORT - TCP:127.0.0.1:$PORT,keepalive,keepcnt=10,keepidle=3,keepintvl=1 I had originally tried it with only the keepalive option, but it took adding the other three options for it to work. Perhaps this is particular to my linux mint 13 maya x64 system and keepalive works by itself on windows? Are the other three options supported in stunnel? Dave

2 1

What do I need to provide an SSL service and verify individual clients?
by John Long 22 Jul '13

22 Jul '13

Hi, I want to set up a service using stunnel as a server. I want only specific clients to be able to connect. Each client will have an SSL-enabled client app. I understand the part about needing to create a self-signed cert for the stunnel server. I don't understand what Stunnel will require from each client. Do I have to create CSRs for each client and sign them with my self-signed cert, or will the keys from additional standalone self-signed certs for each client be good enough on the client side as long as I have a cert that for each key in the certificate path of the server? Is it correct that verify=3 will make sure only clients that have keys matching the certs in the server cert path can connect? If a client with a key that I have no cert for tries to connect, what should happen? Will it time out or will there be an error that the key isn't valid? Thanks, /jl

1 0

Stunnel log file limit
by mehmet ozisik 18 Jul '13

18 Jul '13

Hi, I would like to ask some questions regarding stunnel logging which I could not find answer with googling. 1) what is the limit of stunnel log file (can we define this)? 2) If there is a limit, when the limit is reached does it remove the filled file and starts with the same name an empty log file? Regards Mehmet

3 5

Feature requests
by Death Master 17 Jul '13

17 Jul '13

Can you implement some features? 1) Load balancing leastconn (like leastconn in haproxy) 2) UDT transport between stunnel instances(with several congestion controls which are already implemented for UDT) 3) SCTP transport between stunnel instances (if can be done in userspace) P.S. I'm using 400mbit WAN with 55-90ms latency+0-10%packet loss and on one end I can't control TCP settings at all (remote end is on OpenVZ VPS).

2 1

Line 51: "[pop3s]": Failed to initialize SSL
by Laura Fried 15 Jul '13

15 Jul '13

Beginning with Stunnel version 4.55 and continuing with 4.56 I can configure, make and make install without issue. But as soon as I try to start stunnel with the following command: /usr/local/bin/stunnel /usr/local/etc/stunnel/stunnel.conf I get the folllowing error message: Clients allowed=500 stunnel 4.56 on x86_64-unknown-linux-gnu platform Compiled/running with OpenSSL 1.0.1 14 Mar 2012 Threading:PTHREAD Sockets:POLL,IPv6 SSL:ENGINE,OCSP,FIPS Reading configuration from file /usr/local/etc/stunnel/stunnel.conf FIPS_mode_set: F06D065: error:0F06D065:common libcrypto routines:FIPS_mode_set:fips mode not supported Line 51: "[pop3s]": Failed to initialize SSL str_stats: 9 block(s), 163 data byte(s), 522 control byte(s) Any insight into this issue would be greatly appreciated. -- Laura J. Fried

3 5

is verify level 4 working?
by dansmith 11 Jul '13

11 Jul '13

I would expect that level 4 only compares locally installed certificates, however I get the same behaviour as with level 3, stunnel expects a CA cert. Here'e the relevant log when on level 4 Jul 6 23:46:31 mmm stunnel: LOG7[7870:140491349628672]: Starting certificate verification: depth=0, /C=qq/ST=qq/O=qqq/OU=rer/CN=redf/emailAddress=rfd Jul 6 23:46:31 mmm stunnel: LOG4[7870:140491349628672]: CERT: Verification error: unable to get local issuer certificate Jul 6 23:46:31 mmm stunnel: LOG4[7870:140491349628672]: Certificate check failed: depth=0, /C=qq/ST=qq/O=qqq/OU=rer/CN=redf/emailAddress=rfd Jul 6 23:46:31 mmm stunnel: LOG7[7872:140080853112576]: SSL alert (read): fatal: unknown CA What am I missing in understanding verify's level 4 ?

3 6

Creating a Centralized Secure Log Server with syslog-ng and Stunnel
by Szajt, Pablo 10 Jul '13

10 Jul '13

Hi guys, I have the task to install a secure syslog server using syslog-ng and stunnel. The Syslog server is a Solaris 10 and Syslog clients are HP-UX 11.31. I've spent already so many hours and I cannot make it run properly. I know syslog-ng works well without stunnel. I'm pretty sure someone is already using it. I'd like to have step by step installation process. I have no issue if I have to start from scratch. Thanks for your help, Pablo Pablo Szajt

2 1

Stunnel 4.56 and FIPS
by Ondrej Hrebicek 09 Jul '13

09 Jul '13

Hello stunnel users, I'm trying to compile stunnel 4.56 with FIPS support on Ubuntu 12.04. Always end up with the infamous "fingerprint does not match" error. I can't figure out what I'm doing wrong. 1. Download openssl-fips-2.0.2.tar.gz, unpack, ./config, make, and sudo make install (as specified in http://www.openssl.org/docs/fips/UserGuide-2.0.pdf) 2. Download openssl-1.0.1e.tar.gz, unpack, ./config fips --with-fipslibdir=/usr/local/ssl/fips-2.0/lib/ --with-fipsdir=/usr/local/ssl/fips-2.0/, make depend, make, and sudo make install 3. At this point, openssl is working in FIPS mode: > OPENSSL_FIPS=1 /usr/local/ssl/bin/openssl version OpenSSL 1.0.1e-fips 11 Feb 2013 > OPENSSL_FIPS=1 /usr/local/ssl/bin/openssl sha1 c_rehash SHA1(c_rehash)= 5af9e1479950bbbd9d3304c181b3f802c54f64fd > OPENSSL_FIPS=1 /usr/local/ssl/bin/openssl md5 c_rehash Error setting digest md5 139806582736544:error:060A80A3:digital envelope routines:FIPS_DIGESTINIT:disabled for fips:fips_md.c:180: 4. Download stunnel-4.56.tar.gz, unpack, ./configure --enable-fips --with-ssl=/usr/local/ssl, make, and sudo make install 5. While configuring and building stunnel completes as expected, the following does appear in ./configure's output: checking whether to enable FIPS mode support... yes configure: **************************************** SSL checking for SSL directory... /usr/local/ssl checking /usr/local/ssl/include/openssl/engine.h usability... yes checking /usr/local/ssl/include/openssl/engine.h presence... yes checking for /usr/local/ssl/include/openssl/engine.h... yes checking /usr/local/ssl/include/openssl/ocsp.h usability... yes checking /usr/local/ssl/include/openssl/ocsp.h presence... yes checking for /usr/local/ssl/include/openssl/ocsp.h... yes checking /usr/local/ssl/include/openssl/fips.h usability... no checking /usr/local/ssl/include/openssl/fips.h presence... no checking for /usr/local/ssl/include/openssl/fips.h... no configure: WARNING: OpenSSL fips header not found This is not entirely unexpected as fips.h only exists in /usr/local/ssl/fips-2.0/include/openssl. 6. Running stunnel however fails: > /usr/local/bin/stunnel Clients allowed=500 stunnel 4.56 on x86_64-unknown-linux-gnu platform Compiled/running with OpenSSL 1.0.1e-fips 11 Feb 2013 Threading:PTHREAD Sockets:POLL,IPv6 SSL:ENGINE,OCSP,FIPS Reading configuration from file /usr/local/etc/stunnel/stunnel.conf FIPS_mode_set: 2D06B06F: error:2D06B06F:FIPS routines:FIPS_check_incore_fingerprint:fingerprint does not match Line 61: "[pop3s]": Failed to initialize SSL str_stats: 5 block(s), 120 data byte(s), 290 control byte(s) I can't figure out what's causing this, hoping someone on the list may have a couple suggestions. Thanks in advance!

2 2

Re: [stunnel-users] is verify level 4 working?
by Thomas Eifert 08 Jul '13

08 Jul '13

dansmith, I'd be the last to argue with you. Purely as an experiment, I tried changing the verify level from 4 to 3, but it didn't fly. I most likely missed the entirety of the signing chain, as I only added the certificate of the *issuing* CA. Regards, Thomas On 7/8/2013 7:01 PM, dansmith wrote: > Thomas, the recent exception you are describing - needing a CA > sertificate and server certificate is what verify=3 does. > So, I guess there is some regression in the code. > When I look at stunnel's verify.c code, there is only one reference to > level 4 in line 225. It seems like verify=4 functionality is missing > from the code. > > On 07/08/2013 11:44 PM, Thomas Eifert wrote: >> dansmith, >> >> It's my understanding that verify = 4 should, theoretically, look only >> for the server certificate, and this is the way I've been using it >> with great success over the past year or so. Recently, however, I ran >> into an exception to that behavior. >> >> In my case, I only had to download and install one certificate; that >> of the signing CA. I simply pasted it directly below the server >> certificate in the associated .pem file. The CA certificate wasn't >> originally in .pem format, so I converted it beforehand. OpenSSL has >> conversion capability, and there are also online certificate tools >> available. Your mileage may vary. >> >> Good luck. >> >> Thomas >> >> >> On 7/8/2013 3:01 PM, dansmith wrote: >> >>> Could you kindly break it down for me. Are you saying that I need to >>> have two CAs A & B. A signs the certificate of B and B signs the >>> certificate of my server? >>> Do I understand correctly that verify=4 is supposed to simply ignore >> any >>> CAs and only look at the actual certificate, comparing it to the >>> certificate in CAfile ? >>> >>> >>> On 07/08/2013 06:32 PM, Thomas Eifert wrote: >>>> You're not missing anything. I've experienced a similar issue. While >>>> verify = 4 generally works well in most cases and will ignore the CA >>>> chain, I've encountered a few isolated incidences in which I've had to >>>> append or "chain" the server certificate with the certificate of the >>>> CA. Give it a shot and see if it resolves your issue. >>>> >>>> Thomas >>>> >>>> On 7/8/2013 3:02 AM, dansmith wrote: >>>>> I would expect that level 4 only compares locally installed >>>>> certificates, however I get the same behaviour as with level 3, >> stunnel >>>>> expects a CA cert. >>>>> Here'e the relevant log when on level 4 >>>>> >>>>> Jul 6 23:46:31 mmm stunnel: LOG7[7870:140491349628672]: Starting >>>>> certificate verification: depth=0, >>>>> /C=qq/ST=qq/O=qqq/OU=rer/CN=redf/emailAddress=rfd >>>>> Jul 6 23:46:31 mmm stunnel: LOG4[7870:140491349628672]: CERT: >>>>> Verification error: unable to get local issuer certificate >>>>> Jul 6 23:46:31 mmm stunnel: LOG4[7870:140491349628672]: Certificate >>>>> check failed: depth=0, >> /C=qq/ST=qq/O=qqq/OU=rer/CN=redf/emailAddress=rfd >>>>> Jul 6 23:46:31 mmm stunnel: LOG7[7872:140080853112576]: SSL alert >>>>> (read): fatal: unknown CA >>>>> >>>>> What am I missing in understanding verify's level 4 ? >>>>> >>>>> >>>>> >>>>> >>>>> _______________________________________________ >>>>> stunnel-users mailing list >>>>> stunnel-users(a)stunnel.org >>>>> https://www.stunnel.org/cgi-bin/mailman/listinfo/stunnel-users >>>>> >>>> >>> >>> >> > > -- Attention: This message and all attachments are private and may contain information that is confidential and privileged. If you received this message in error, please notify the sender by reply email and delete the message immediately.

1 0

is verify level 4 working?
by Thomas Eifert 08 Jul '13

08 Jul '13

dansmith, It's my understanding that verify = 4 should, theoretically, look only for the server certificate, and this is the way I've been using it with great success over the past year or so. Recently, however, I ran into an exception to that behavior. In my case, I only had to download and install one certificate; that of the signing CA. I simply pasted it directly below the server certificate in the associated .pem file. The CA certificate wasn't originally in .pem format, so I converted it beforehand. OpenSSL has conversion capability, and there are also online certificate tools available. Your mileage may vary. Good luck. Thomas On 7/8/2013 3:01 PM, dansmith wrote: > Could you kindly break it down for me. Are you saying that I need to > have two CAs A & B. A signs the certificate of B and B signs the > certificate of my server? > Do I understand correctly that verify=4 is supposed to simply ignore any > CAs and only look at the actual certificate, comparing it to the > certificate in CAfile ? > > > On 07/08/2013 06:32 PM, Thomas Eifert wrote: >> You're not missing anything. I've experienced a similar issue. While >> verify = 4 generally works well in most cases and will ignore the CA >> chain, I've encountered a few isolated incidences in which I've had to >> append or "chain" the server certificate with the certificate of the >> CA. Give it a shot and see if it resolves your issue. >> >> Thomas >> >> On 7/8/2013 3:02 AM, dansmith wrote: >>> I would expect that level 4 only compares locally installed >>> certificates, however I get the same behaviour as with level 3, stunnel >>> expects a CA cert. >>> Here'e the relevant log when on level 4 >>> >>> Jul 6 23:46:31 mmm stunnel: LOG7[7870:140491349628672]: Starting >>> certificate verification: depth=0, >>> /C=qq/ST=qq/O=qqq/OU=rer/CN=redf/emailAddress=rfd >>> Jul 6 23:46:31 mmm stunnel: LOG4[7870:140491349628672]: CERT: >>> Verification error: unable to get local issuer certificate >>> Jul 6 23:46:31 mmm stunnel: LOG4[7870:140491349628672]: Certificate >>> check failed: depth=0, /C=qq/ST=qq/O=qqq/OU=rer/CN=redf/emailAddress=rfd >>> Jul 6 23:46:31 mmm stunnel: LOG7[7872:140080853112576]: SSL alert >>> (read): fatal: unknown CA >>> >>> What am I missing in understanding verify's level 4 ? >>> >>> >>> >>> >>> _______________________________________________ >>> stunnel-users mailing list >>> stunnel-users(a)stunnel.org >>> https://www.stunnel.org/cgi-bin/mailman/listinfo/stunnel-users >>> >> > > -- Attention: This message and all attachments are private and may contain information that is confidential and privileged. If you received this message in error, please notify the sender by reply email and delete the message immediately. -- Attention: This message and all attachments are private and may contain information that is confidential and privileged. If you received this message in error, please notify the sender by reply email and delete the message immediately.

1 0

Re: [stunnel-users] accept : too many open files error(24)
by Senthil Naidu 01 Jul '13

01 Jul '13

Hi, We are using 64 bit version of centos, and the ram of this system is 1gb so should we increase this limit to 100000 in the limits.conf Regards senthil On Sun, Jun 30, 2013 at 12:31 AM, Michael Curran <mike_curran(a)hotmail.com>wrote: > Are you running 32-kernel for centos? > > 32-bit limits in the 4500 range for open connections due to the memory > constraints > > We usually set our open file limits to 100I specifically for Stunnel user > > *Sent from my Verizon Wireless 4G LTE DROID* > > > Senthil Naidu <senthil.naidu(a)gmail.com> wrote: > > Hi > > > > We are using stunnel 4.32 on centos and our ulimits in limits.conf are as > follows > > > > * soft nofile 16384 > > * hard nofile 65536 > > > > We keep getting the error “too many open files(24)” and stunnel does not > accept new connection till we restart the same > > > > Is this ulimit proper or we need to increase the same , we are look for > 3000 to 5000 connections > > > > Regards > > Senthil >

2 2

accept : too many open files error(24)
by Senthil Naidu 29 Jun '13

29 Jun '13

Hi We are using stunnel 4.32 on centos and our ulimits in limits.conf are as follows * soft nofile 16384 * hard nofile 65536 We keep getting the error “too many open files(24)” and stunnel does not accept new connection till we restart the same Is this ulimit proper or we need to increase the same , we are look for 3000 to 5000 connections Regards Senthil

1 0

Re: [stunnel-users] Sending Email Without Authentication with gmail
by Stephen Gates 28 Jun '13

28 Jun '13

I downloaded the old argosoft freeware and it works! Praise God! Thanks to all for your time, help and suggestions!! Much appreciated. Stephen Gates Harold K. Scholz Company 7800 Serum Avenue Ralston, NE 68127 402-339-7600

2 1

Re: [stunnel-users] Sending Email from PLC Without Authentication with gmail - static ip/argosoft/php script
by Stephen Gates 28 Jun '13

28 Jun '13

> The only limitation I can recall on this freeware version is in the file size (5MB) and in the retries between relay errors. > > But you have to be aware when using a mail server that, thanks to Spamhaus, you need a static IP or almost all SMTPs out there will block your server to accept mail from (including Gmail)." > The router that my network is connected to has a static IP as far as I can tell and so does the PC and PLC on the LAN. How can I determine for sure if I have a static IP? I will try the Argosoft link. > Question? What does this device have available for resources. I use a php script that checks server status emails via gmail when there are changes in status, and it handles the connection directly to gmail. > I'm not sure. I don't know what php script is. I am about to try emailrelay from sourceforge.net. Anybody have experience with that? http://emailrelay.sourceforge.net/ Thanks, Stephen Gates Harold K. Scholz Company 7800 Serum Avenue Ralston, NE 68127 402-339-7600

1 0

Re: [stunnel-users] Sending Email from PLC Without Authentication with gmail
by Stephen Gates 27 Jun '13

27 Jun '13

"The issue with your situation is not stunnel but the fact that your SMTP client does not have the capability to provide authentication. As you mentioned, Gmail will require authentication information from the client. If that information is not provided by the SMTP client application, then the SMTP transaction will fail. ? I would suggest you consider setting up some kind of SMTP Relay. Which will serve as a proxy between your PLC and Google SMTP servers. ? You can also take a look at this document and if possible implement the last approach? http://support.google.com/a/bin/answer.py?hl=en <http://support.google.com/a/bin/answer.py?hl=en&answer=176600> &answer=176600" Thanks for your help Leandro. Do you have a suggestion for a SMTP Relay?? I have tried Free SMTP Server which was the only thing that has worked so far and worked almost perfectly except that it can only send out 10 emails a day. And I need more capacity for sending than that. I also have used trial versions of ArgoSoft, 1st Mail Server and QK SMTP Server but couldn't get those to work. I have tried the Google suggestion for using asmpx.l.google.com but I need to send to vtext.com addresses which are outside of the google domain. I tried adding the vtext.com addresses to googlegroups.com and sending emails using the asmpx.l.google.com server but vtext did not receive the emails for googlegroups.com. So I'm desperate to find some sort of solution. Thanks, Stephen Gates Harold K. Scholz Company 7800 Serum Avenue Ralston, NE 68127 402-339-7600

3 2

Stunnel | connection reset by peer
by Prem Vikash Upadhyay 27 Jun '13

27 Jun '13

Hi, Is there any configuration that can be used, to change the 'connection reset by peer' to 'connection refused'?. In our setup we are using day cq dispatcher with sticky session enabled, but dispatcher is invalidating sticky session only when it receiving error as 'connection refused', while stunnel is always sending error as 'connection reset by peer', whenever the connect server is down/crashed. Thanks Prem

2 1

Sending Email from PLC Without Authentication with gmail
by Stephen Gates 27 Jun '13

27 Jun '13

A customer needs to send emails from a Programmable Logic Controller (PLC) which cannot provide authentication. The customer's email server is gmail which obviously requires authentication. The PLC IP is 192.168.1.2 and the PC IP on which stunnel is installed is 192.168.1.31 My config is: cert = stunnel.pem [smtps] client = yes accept = 25 connect = smtp.gmail.com:465 The PLC is set up to send emails to the IP of the PC 192.168.1.31 When I try to send emails I get the following in the stunnel log: 2013.06.26 14:26:30 LOG5[12384:13048]: Service [smtps] accepted connection from 192.168.1.2:2938 2013.06.26 14:26:30 LOG5[12384:13048]: connect_blocking: connected 74.125.130.108:465 2013.06.26 14:26:30 LOG5[12384:13048]: Service [smtps] connected remote server from 192.168.1.31:53599 Any help would be greatly appreciated! Stephen Gates Harold K. Scholz Company 7800 Serum Avenue Ralston, NE 68127 402-339-7600

2 1

Re: [stunnel-users] Sending Email from PLC Without Authentication - With debug = 7 log
by Stephen Gates 26 Jun '13

26 Jun '13

Just wanted to send this again with a clarified subject. Still getting the connect_blocking error. Any more ideas? Thanks for replying, Brian. From: Stephen Gates [mailto:sgates@hkscholz.com] Sent: Wednesday, June 26, 2013 3:09 PM To: 'stunnel-users(a)stunnel.org' Subject: RE: Sending Email from PLC Without Authentication with gmail I added the following as Brian suggested. debug = 7 I tried doing output = stunnel.log but that cause an error when I reloded the config file. Here's the log after adding the above and trying to send another email. 2013.06.26 15:03:37 LOG7[10620:10992]: Service [smtps] (FD=416) bound to 0.0.0.0:25 2013.06.26 15:03:58 LOG7[10620:10992]: Service [smtps] accepted (FD=296) from 192.168.1.2:2946 2013.06.26 15:03:58 LOG7[10620:10992]: Creating a new thread 2013.06.26 15:03:58 LOG7[10620:10992]: New thread created 2013.06.26 15:03:58 LOG7[10620:10360]: Service [smtps] started 2013.06.26 15:03:58 LOG5[10620:10360]: Service [smtps] accepted connection from 192.168.1.2:2946 2013.06.26 15:03:58 LOG6[10620:10360]: connect_blocking: connecting 74.125.130.108:465 2013.06.26 15:03:58 LOG7[10620:10360]: connect_blocking: s_poll_wait 74.125.130.108:465: waiting 10 seconds 2013.06.26 15:03:58 LOG5[10620:10360]: connect_blocking: connected 74.125.130.108:465 2013.06.26 15:03:58 LOG5[10620:10360]: Service [smtps] connected remote server from 192.168.1.31:53640 2013.06.26 15:03:58 LOG7[10620:10360]: Remote socket (FD=368) initialized 2013.06.26 15:03:58 LOG7[10620:10360]: SNI: sending servername: smtp.gmail.com 2013.06.26 15:03:58 LOG7[10620:10360]: SSL state (connect): before/connect initialization 2013.06.26 15:03:58 LOG7[10620:10360]: SSL state (connect): SSLv3 write client hello A 2013.06.26 15:03:58 LOG7[10620:10360]: SSL state (connect): SSLv3 read server hello A 2013.06.26 15:03:58 LOG7[10620:10360]: SSL state (connect): SSLv3 read server certificate A 2013.06.26 15:03:58 LOG7[10620:10360]: SSL state (connect): SSLv3 read server done A 2013.06.26 15:03:58 LOG7[10620:10360]: SSL state (connect): SSLv3 write client key exchange A 2013.06.26 15:03:58 LOG7[10620:10360]: SSL state (connect): SSLv3 write change cipher spec A 2013.06.26 15:03:58 LOG7[10620:10360]: SSL state (connect): SSLv3 write finished A 2013.06.26 15:03:58 LOG7[10620:10360]: SSL state (connect): SSLv3 flush data 2013.06.26 15:03:58 LOG7[10620:10360]: SSL state (connect): SSLv3 read server session ticket A 2013.06.26 15:03:58 LOG7[10620:10360]: SSL state (connect): SSLv3 read finished A 2013.06.26 15:03:58 LOG7[10620:10360]: 1 items in the session cache 2013.06.26 15:03:58 LOG7[10620:10360]: 1 client connects (SSL_connect()) 2013.06.26 15:03:58 LOG7[10620:10360]: 1 client connects that finished 2013.06.26 15:03:58 LOG7[10620:10360]: 0 client renegotiations requested 2013.06.26 15:03:58 LOG7[10620:10360]: 0 server connects (SSL_accept()) 2013.06.26 15:03:58 LOG7[10620:10360]: 0 server connects that finished 2013.06.26 15:03:58 LOG7[10620:10360]: 0 server renegotiations requested 2013.06.26 15:03:58 LOG7[10620:10360]: 0 session cache hits 2013.06.26 15:03:58 LOG7[10620:10360]: 0 external session cache hits 2013.06.26 15:03:58 LOG7[10620:10360]: 0 session cache misses 2013.06.26 15:03:58 LOG7[10620:10360]: 0 session cache timeouts 2013.06.26 15:03:58 LOG7[10620:10360]: Peer certificate was cached (2266 bytes) 2013.06.26 15:03:58 LOG6[10620:10360]: SSL connected: new session negotiated 2013.06.26 15:03:58 LOG6[10620:10360]: Negotiated TLSv1/SSLv3 ciphersuite: AES128-SHA (128-bit encryption) 2013.06.26 15:03:58 LOG6[10620:10360]: Compression: null, expansion: null 2013.06.26 15:03:59 LOG6[10620:10360]: SSL socket closed (SSL_read) 2013.06.26 15:03:59 LOG7[10620:10360]: Sent socket write shutdown 2013.06.26 15:03:59 LOG5[10620:10360]: Connection closed: 65 byte(s) sent to SSL, 293 byte(s) sent to socket 2013.06.26 15:03:59 LOG7[10620:10360]: Remote socket (FD=368) closed 2013.06.26 15:03:59 LOG7[10620:10360]: Local socket (FD=296) closed 2013.06.26 15:03:59 LOG7[10620:10360]: Service [smtps] finished (0 left) 2013.06.26 15:03:59 LOG7[10620:10992]: Service [smtps] accepted (FD=364) from 192.168.1.2:2947 2013.06.26 15:03:59 LOG7[10620:10992]: Creating a new thread 2013.06.26 15:03:59 LOG7[10620:10992]: New thread created 2013.06.26 15:03:59 LOG7[10620:7792]: Service [smtps] started 2013.06.26 15:03:59 LOG5[10620:7792]: Service [smtps] accepted connection from 192.168.1.2:2947 2013.06.26 15:03:59 LOG6[10620:7792]: connect_blocking: connecting 74.125.130.109:465 2013.06.26 15:03:59 LOG7[10620:7792]: connect_blocking: s_poll_wait 74.125.130.109:465: waiting 10 seconds 2013.06.26 15:03:59 LOG5[10620:7792]: connect_blocking: connected 74.125.130.109:465 2013.06.26 15:03:59 LOG5[10620:7792]: Service [smtps] connected remote server from 192.168.1.31:53641 2013.06.26 15:03:59 LOG7[10620:7792]: Remote socket (FD=368) initialized 2013.06.26 15:03:59 LOG7[10620:7792]: SNI: sending servername: smtp.gmail.com 2013.06.26 15:03:59 LOG7[10620:7792]: SSL state (connect): before/connect initialization 2013.06.26 15:03:59 LOG7[10620:7792]: SSL state (connect): SSLv3 write client hello A 2013.06.26 15:03:59 LOG7[10620:7792]: SSL state (connect): SSLv3 read server hello A 2013.06.26 15:03:59 LOG7[10620:7792]: SSL state (connect): SSLv3 read finished A 2013.06.26 15:03:59 LOG7[10620:7792]: SSL state (connect): SSLv3 write change cipher spec A 2013.06.26 15:03:59 LOG7[10620:7792]: SSL state (connect): SSLv3 write finished A 2013.06.26 15:03:59 LOG7[10620:7792]: SSL state (connect): SSLv3 flush data 2013.06.26 15:03:59 LOG7[10620:7792]: 1 items in the session cache 2013.06.26 15:03:59 LOG7[10620:7792]: 2 client connects (SSL_connect()) 2013.06.26 15:03:59 LOG7[10620:7792]: 2 client connects that finished 2013.06.26 15:03:59 LOG7[10620:7792]: 0 client renegotiations requested 2013.06.26 15:03:59 LOG7[10620:7792]: 0 server connects (SSL_accept()) 2013.06.26 15:03:59 LOG7[10620:7792]: 0 server connects that finished 2013.06.26 15:03:59 LOG7[10620:7792]: 0 server renegotiations requested 2013.06.26 15:03:59 LOG7[10620:7792]: 1 session cache hits 2013.06.26 15:03:59 LOG7[10620:7792]: 0 external session cache hits 2013.06.26 15:03:59 LOG7[10620:7792]: 0 session cache misses 2013.06.26 15:03:59 LOG7[10620:7792]: 0 session cache timeouts 2013.06.26 15:03:59 LOG6[10620:7792]: SSL connected: previous session reused 2013.06.26 15:04:00 LOG6[10620:7792]: SSL socket closed (SSL_read) 2013.06.26 15:04:00 LOG7[10620:7792]: Sent socket write shutdown 2013.06.26 15:04:00 LOG5[10620:7792]: Connection closed: 65 byte(s) sent to SSL, 287 byte(s) sent to socket 2013.06.26 15:04:00 LOG7[10620:7792]: Remote socket (FD=368) closed 2013.06.26 15:04:00 LOG7[10620:7792]: Local socket (FD=364) closed 2013.06.26 15:04:00 LOG7[10620:7792]: Service [smtps] finished (0 left) 2013.06.26 15:04:00 LOG7[10620:10992]: Service [smtps] accepted (FD=372) from 192.168.1.2:2948 2013.06.26 15:04:00 LOG7[10620:10992]: Creating a new thread 2013.06.26 15:04:00 LOG7[10620:10992]: New thread created 2013.06.26 15:04:00 LOG7[10620:12944]: Service [smtps] started 2013.06.26 15:04:00 LOG5[10620:12944]: Service [smtps] accepted connection from 192.168.1.2:2948 2013.06.26 15:04:00 LOG6[10620:12944]: connect_blocking: connecting 74.125.130.108:465 2013.06.26 15:04:00 LOG7[10620:12944]: connect_blocking: s_poll_wait 74.125.130.108:465: waiting 10 seconds 2013.06.26 15:04:00 LOG5[10620:12944]: connect_blocking: connected 74.125.130.108:465 2013.06.26 15:04:00 LOG5[10620:12944]: Service [smtps] connected remote server from 192.168.1.31:53642 2013.06.26 15:04:00 LOG7[10620:12944]: Remote socket (FD=368) initialized 2013.06.26 15:04:00 LOG7[10620:12944]: SNI: sending servername: smtp.gmail.com 2013.06.26 15:04:00 LOG7[10620:12944]: SSL state (connect): before/connect initialization 2013.06.26 15:04:00 LOG7[10620:12944]: SSL state (connect): SSLv3 write client hello A 2013.06.26 15:04:00 LOG7[10620:12944]: SSL state (connect): SSLv3 read server hello A 2013.06.26 15:04:00 LOG7[10620:12944]: SSL state (connect): SSLv3 read finished A 2013.06.26 15:04:00 LOG7[10620:12944]: SSL state (connect): SSLv3 write change cipher spec A 2013.06.26 15:04:00 LOG7[10620:12944]: SSL state (connect): SSLv3 write finished A 2013.06.26 15:04:00 LOG7[10620:12944]: SSL state (connect): SSLv3 flush data 2013.06.26 15:04:00 LOG7[10620:12944]: 1 items in the session cache 2013.06.26 15:04:00 LOG7[10620:12944]: 3 client connects (SSL_connect()) 2013.06.26 15:04:00 LOG7[10620:12944]: 3 client connects that finished 2013.06.26 15:04:00 LOG7[10620:12944]: 0 client renegotiations requested 2013.06.26 15:04:00 LOG7[10620:12944]: 0 server connects (SSL_accept()) 2013.06.26 15:04:00 LOG7[10620:12944]: 0 server connects that finished 2013.06.26 15:04:00 LOG7[10620:12944]: 0 server renegotiations requested 2013.06.26 15:04:00 LOG7[10620:12944]: 2 session cache hits 2013.06.26 15:04:00 LOG7[10620:12944]: 0 external session cache hits 2013.06.26 15:04:00 LOG7[10620:12944]: 0 session cache misses 2013.06.26 15:04:00 LOG7[10620:12944]: 0 session cache timeouts 2013.06.26 15:04:00 LOG6[10620:12944]: SSL connected: previous session reused 2013.06.26 15:04:01 LOG6[10620:12944]: SSL socket closed (SSL_read) 2013.06.26 15:04:01 LOG7[10620:12944]: Sent socket write shutdown 2013.06.26 15:04:01 LOG5[10620:12944]: Connection closed: 65 byte(s) sent to SSL, 290 byte(s) sent to socket 2013.06.26 15:04:01 LOG7[10620:12944]: Remote socket (FD=368) closed 2013.06.26 15:04:01 LOG7[10620:12944]: Local socket (FD=372) closed 2013.06.26 15:04:01 LOG7[10620:12944]: Service [smtps] finished (0 left) 2013.06.26 15:04:01 LOG7[10620:10992]: Service [smtps] accepted (FD=288) from 192.168.1.2:2949 2013.06.26 15:04:01 LOG7[10620:10992]: Creating a new thread 2013.06.26 15:04:01 LOG7[10620:10992]: New thread created 2013.06.26 15:04:01 LOG7[10620:12900]: Service [smtps] started 2013.06.26 15:04:01 LOG5[10620:12900]: Service [smtps] accepted connection from 192.168.1.2:2949 2013.06.26 15:04:01 LOG6[10620:12900]: connect_blocking: connecting 74.125.130.109:465 2013.06.26 15:04:01 LOG7[10620:12900]: connect_blocking: s_poll_wait 74.125.130.109:465: waiting 10 seconds 2013.06.26 15:04:01 LOG5[10620:12900]: connect_blocking: connected 74.125.130.109:465 2013.06.26 15:04:01 LOG5[10620:12900]: Service [smtps] connected remote server from 192.168.1.31:53643 2013.06.26 15:04:01 LOG7[10620:12900]: Remote socket (FD=368) initialized 2013.06.26 15:04:01 LOG7[10620:12900]: SNI: sending servername: smtp.gmail.com 2013.06.26 15:04:01 LOG7[10620:12900]: SSL state (connect): before/connect initialization 2013.06.26 15:04:01 LOG7[10620:12900]: SSL state (connect): SSLv3 write client hello A 2013.06.26 15:04:01 LOG7[10620:12900]: SSL state (connect): SSLv3 read server hello A 2013.06.26 15:04:01 LOG7[10620:12900]: SSL state (connect): SSLv3 read finished A 2013.06.26 15:04:01 LOG7[10620:12900]: SSL state (connect): SSLv3 write change cipher spec A 2013.06.26 15:04:01 LOG7[10620:12900]: SSL state (connect): SSLv3 write finished A 2013.06.26 15:04:01 LOG7[10620:12900]: SSL state (connect): SSLv3 flush data 2013.06.26 15:04:01 LOG7[10620:12900]: 1 items in the session cache 2013.06.26 15:04:01 LOG7[10620:12900]: 4 client connects (SSL_connect()) 2013.06.26 15:04:01 LOG7[10620:12900]: 4 client connects that finished 2013.06.26 15:04:01 LOG7[10620:12900]: 0 client renegotiations requested 2013.06.26 15:04:01 LOG7[10620:12900]: 0 server connects (SSL_accept()) 2013.06.26 15:04:01 LOG7[10620:12900]: 0 server connects that finished 2013.06.26 15:04:01 LOG7[10620:12900]: 0 server renegotiations requested 2013.06.26 15:04:01 LOG7[10620:12900]: 3 session cache hits 2013.06.26 15:04:01 LOG7[10620:12900]: 0 external session cache hits 2013.06.26 15:04:01 LOG7[10620:12900]: 0 session cache misses 2013.06.26 15:04:01 LOG7[10620:12900]: 0 session cache timeouts 2013.06.26 15:04:01 LOG6[10620:12900]: SSL connected: previous session reused 2013.06.26 15:04:02 LOG6[10620:12900]: SSL socket closed (SSL_read) 2013.06.26 15:04:02 LOG7[10620:12900]: Sent socket write shutdown 2013.06.26 15:04:02 LOG5[10620:12900]: Connection closed: 65 byte(s) sent to SSL, 293 byte(s) sent to socket 2013.06.26 15:04:02 LOG7[10620:12900]: Remote socket (FD=368) closed 2013.06.26 15:04:02 LOG7[10620:12900]: Local socket (FD=288) closed 2013.06.26 15:04:02 LOG7[10620:12900]: Service [smtps] finished (0 left) 2013.06.26 15:04:02 LOG7[10620:10992]: Service [smtps] accepted (FD=292) from 192.168.1.2:2950 2013.06.26 15:04:02 LOG7[10620:10992]: Creating a new thread 2013.06.26 15:04:02 LOG7[10620:10992]: New thread created 2013.06.26 15:04:02 LOG7[10620:11560]: Service [smtps] started 2013.06.26 15:04:02 LOG5[10620:11560]: Service [smtps] accepted connection from 192.168.1.2:2950 2013.06.26 15:04:02 LOG6[10620:11560]: connect_blocking: connecting 74.125.130.108:465 2013.06.26 15:04:02 LOG7[10620:11560]: connect_blocking: s_poll_wait 74.125.130.108:465: waiting 10 seconds 2013.06.26 15:04:02 LOG5[10620:11560]: connect_blocking: connected 74.125.130.108:465 2013.06.26 15:04:02 LOG5[10620:11560]: Service [smtps] connected remote server from 192.168.1.31:53644 2013.06.26 15:04:02 LOG7[10620:11560]: Remote socket (FD=368) initialized 2013.06.26 15:04:02 LOG7[10620:11560]: SNI: sending servername: smtp.gmail.com 2013.06.26 15:04:02 LOG7[10620:11560]: SSL state (connect): before/connect initialization 2013.06.26 15:04:02 LOG7[10620:11560]: SSL state (connect): SSLv3 write client hello A 2013.06.26 15:04:02 LOG7[10620:11560]: SSL state (connect): SSLv3 read server hello A 2013.06.26 15:04:02 LOG7[10620:11560]: SSL state (connect): SSLv3 read finished A 2013.06.26 15:04:02 LOG7[10620:11560]: SSL state (connect): SSLv3 write change cipher spec A 2013.06.26 15:04:02 LOG7[10620:11560]: SSL state (connect): SSLv3 write finished A 2013.06.26 15:04:02 LOG7[10620:11560]: SSL state (connect): SSLv3 flush data 2013.06.26 15:04:02 LOG7[10620:11560]: 1 items in the session cache 2013.06.26 15:04:02 LOG7[10620:11560]: 5 client connects (SSL_connect()) 2013.06.26 15:04:02 LOG7[10620:11560]: 5 client connects that finished 2013.06.26 15:04:02 LOG7[10620:11560]: 0 client renegotiations requested 2013.06.26 15:04:02 LOG7[10620:11560]: 0 server connects (SSL_accept()) 2013.06.26 15:04:02 LOG7[10620:11560]: 0 server connects that finished 2013.06.26 15:04:02 LOG7[10620:11560]: 0 server renegotiations requested 2013.06.26 15:04:02 LOG7[10620:11560]: 4 session cache hits 2013.06.26 15:04:02 LOG7[10620:11560]: 0 external session cache hits 2013.06.26 15:04:02 LOG7[10620:11560]: 0 session cache misses 2013.06.26 15:04:02 LOG7[10620:11560]: 0 session cache timeouts 2013.06.26 15:04:02 LOG6[10620:11560]: SSL connected: previous session reused 2013.06.26 15:04:03 LOG6[10620:11560]: SSL socket closed (SSL_read) 2013.06.26 15:04:03 LOG7[10620:11560]: Sent socket write shutdown 2013.06.26 15:04:03 LOG5[10620:11560]: Connection closed: 65 byte(s) sent to SSL, 296 byte(s) sent to socket 2013.06.26 15:04:03 LOG7[10620:11560]: Remote socket (FD=368) closed 2013.06.26 15:04:03 LOG7[10620:11560]: Local socket (FD=292) closed 2013.06.26 15:04:03 LOG7[10620:11560]: Service [smtps] finished (0 left) 2013.06.26 15:04:03 LOG7[10620:10992]: Service [smtps] accepted (FD=296) from 192.168.1.2:2951 2013.06.26 15:04:03 LOG7[10620:10992]: Creating a new thread 2013.06.26 15:04:03 LOG7[10620:10992]: New thread created 2013.06.26 15:04:03 LOG7[10620:10092]: Service [smtps] started 2013.06.26 15:04:03 LOG5[10620:10092]: Service [smtps] accepted connection from 192.168.1.2:2951 2013.06.26 15:04:03 LOG6[10620:10092]: connect_blocking: connecting 74.125.130.109:465 2013.06.26 15:04:03 LOG7[10620:10092]: connect_blocking: s_poll_wait 74.125.130.109:465: waiting 10 seconds 2013.06.26 15:04:03 LOG5[10620:10092]: connect_blocking: connected 74.125.130.109:465 2013.06.26 15:04:03 LOG5[10620:10092]: Service [smtps] connected remote server from 192.168.1.31:53645 2013.06.26 15:04:03 LOG7[10620:10092]: Remote socket (FD=368) initialized 2013.06.26 15:04:03 LOG7[10620:10092]: SNI: sending servername: smtp.gmail.com 2013.06.26 15:04:03 LOG7[10620:10092]: SSL state (connect): before/connect initialization 2013.06.26 15:04:03 LOG7[10620:10092]: SSL state (connect): SSLv3 write client hello A 2013.06.26 15:04:03 LOG7[10620:10092]: SSL state (connect): SSLv3 read server hello A 2013.06.26 15:04:03 LOG7[10620:10092]: SSL state (connect): SSLv3 read finished A 2013.06.26 15:04:03 LOG7[10620:10092]: SSL state (connect): SSLv3 write change cipher spec A 2013.06.26 15:04:03 LOG7[10620:10092]: SSL state (connect): SSLv3 write finished A 2013.06.26 15:04:03 LOG7[10620:10092]: SSL state (connect): SSLv3 flush data 2013.06.26 15:04:03 LOG7[10620:10092]: 1 items in the session cache 2013.06.26 15:04:03 LOG7[10620:10092]: 6 client connects (SSL_connect()) 2013.06.26 15:04:03 LOG7[10620:10092]: 6 client connects that finished 2013.06.26 15:04:03 LOG7[10620:10092]: 0 client renegotiations requested 2013.06.26 15:04:03 LOG7[10620:10092]: 0 server connects (SSL_accept()) 2013.06.26 15:04:03 LOG7[10620:10092]: 0 server connects that finished 2013.06.26 15:04:03 LOG7[10620:10092]: 0 server renegotiations requested 2013.06.26 15:04:03 LOG7[10620:10092]: 5 session cache hits 2013.06.26 15:04:03 LOG7[10620:10092]: 0 external session cache hits 2013.06.26 15:04:03 LOG7[10620:10092]: 0 session cache misses 2013.06.26 15:04:03 LOG7[10620:10092]: 0 session cache timeouts 2013.06.26 15:04:03 LOG6[10620:10092]: SSL connected: previous session reused 2013.06.26 15:04:04 LOG6[10620:10092]: SSL socket closed (SSL_read) 2013.06.26 15:04:04 LOG7[10620:10092]: Sent socket write shutdown 2013.06.26 15:04:04 LOG5[10620:10092]: Connection closed: 65 byte(s) sent to SSL, 290 byte(s) sent to socket 2013.06.26 15:04:04 LOG7[10620:10092]: Remote socket (FD=368) closed 2013.06.26 15:04:04 LOG7[10620:10092]: Local socket (FD=296) closed 2013.06.26 15:04:04 LOG7[10620:10092]: Service [smtps] finished (0 left) 2013.06.26 15:04:04 LOG7[10620:10992]: Service [smtps] accepted (FD=364) from 192.168.1.2:2952 2013.06.26 15:04:04 LOG7[10620:10992]: Creating a new thread 2013.06.26 15:04:04 LOG7[10620:10992]: New thread created 2013.06.26 15:04:04 LOG7[10620:1404]: Service [smtps] started 2013.06.26 15:04:04 LOG5[10620:1404]: Service [smtps] accepted connection from 192.168.1.2:2952 2013.06.26 15:04:04 LOG6[10620:1404]: connect_blocking: connecting 74.125.130.108:465 2013.06.26 15:04:04 LOG7[10620:1404]: connect_blocking: s_poll_wait 74.125.130.108:465: waiting 10 seconds 2013.06.26 15:04:04 LOG5[10620:1404]: connect_blocking: connected 74.125.130.108:465 2013.06.26 15:04:04 LOG5[10620:1404]: Service [smtps] connected remote server from 192.168.1.31:53646 2013.06.26 15:04:04 LOG7[10620:1404]: Remote socket (FD=368) initialized 2013.06.26 15:04:04 LOG7[10620:1404]: SNI: sending servername: smtp.gmail.com 2013.06.26 15:04:04 LOG7[10620:1404]: SSL state (connect): before/connect initialization 2013.06.26 15:04:04 LOG7[10620:1404]: SSL state (connect): SSLv3 write client hello A 2013.06.26 15:04:05 LOG7[10620:1404]: SSL state (connect): SSLv3 read server hello A 2013.06.26 15:04:05 LOG7[10620:1404]: SSL state (connect): SSLv3 read finished A 2013.06.26 15:04:05 LOG7[10620:1404]: SSL state (connect): SSLv3 write change cipher spec A 2013.06.26 15:04:05 LOG7[10620:1404]: SSL state (connect): SSLv3 write finished A 2013.06.26 15:04:05 LOG7[10620:1404]: SSL state (connect): SSLv3 flush data 2013.06.26 15:04:05 LOG7[10620:1404]: 1 items in the session cache 2013.06.26 15:04:05 LOG7[10620:1404]: 7 client connects (SSL_connect()) 2013.06.26 15:04:05 LOG7[10620:1404]: 7 client connects that finished 2013.06.26 15:04:05 LOG7[10620:1404]: 0 client renegotiations requested 2013.06.26 15:04:05 LOG7[10620:1404]: 0 server connects (SSL_accept()) 2013.06.26 15:04:05 LOG7[10620:1404]: 0 server connects that finished 2013.06.26 15:04:05 LOG7[10620:1404]: 0 server renegotiations requested 2013.06.26 15:04:05 LOG7[10620:1404]: 6 session cache hits 2013.06.26 15:04:05 LOG7[10620:1404]: 0 external session cache hits 2013.06.26 15:04:05 LOG7[10620:1404]: 0 session cache misses 2013.06.26 15:04:05 LOG7[10620:1404]: 0 session cache timeouts 2013.06.26 15:04:05 LOG6[10620:1404]: SSL connected: previous session reused 2013.06.26 15:04:05 LOG6[10620:1404]: SSL socket closed (SSL_read) 2013.06.26 15:04:05 LOG7[10620:1404]: Sent socket write shutdown 2013.06.26 15:04:05 LOG5[10620:1404]: Connection closed: 65 byte(s) sent to SSL, 290 byte(s) sent to socket 2013.06.26 15:04:05 LOG7[10620:1404]: Remote socket (FD=368) closed 2013.06.26 15:04:05 LOG7[10620:1404]: Local socket (FD=364) closed 2013.06.26 15:04:05 LOG7[10620:1404]: Service [smtps] finished (0 left) 2013.06.26 15:04:05 LOG7[10620:10992]: Service [smtps] accepted (FD=372) from 192.168.1.2:2953 2013.06.26 15:04:05 LOG7[10620:10992]: Creating a new thread 2013.06.26 15:04:05 LOG7[10620:10992]: New thread created 2013.06.26 15:04:05 LOG7[10620:11904]: Service [smtps] started 2013.06.26 15:04:05 LOG5[10620:11904]: Service [smtps] accepted connection from 192.168.1.2:2953 2013.06.26 15:04:05 LOG6[10620:11904]: connect_blocking: connecting 74.125.130.109:465 2013.06.26 15:04:05 LOG7[10620:11904]: connect_blocking: s_poll_wait 74.125.130.109:465: waiting 10 seconds 2013.06.26 15:04:06 LOG5[10620:11904]: connect_blocking: connected 74.125.130.109:465 2013.06.26 15:04:06 LOG5[10620:11904]: Service [smtps] connected remote server from 192.168.1.31:53647 2013.06.26 15:04:06 LOG7[10620:11904]: Remote socket (FD=368) initialized 2013.06.26 15:04:06 LOG7[10620:11904]: SNI: sending servername: smtp.gmail.com 2013.06.26 15:04:06 LOG7[10620:11904]: SSL state (connect): before/connect initialization 2013.06.26 15:04:06 LOG7[10620:11904]: SSL state (connect): SSLv3 write client hello A 2013.06.26 15:04:06 LOG7[10620:11904]: SSL state (connect): SSLv3 read server hello A 2013.06.26 15:04:06 LOG7[10620:11904]: SSL state (connect): SSLv3 read finished A 2013.06.26 15:04:06 LOG7[10620:11904]: SSL state (connect): SSLv3 write change cipher spec A 2013.06.26 15:04:06 LOG7[10620:11904]: SSL state (connect): SSLv3 write finished A 2013.06.26 15:04:06 LOG7[10620:11904]: SSL state (connect): SSLv3 flush data 2013.06.26 15:04:06 LOG7[10620:11904]: 1 items in the session cache 2013.06.26 15:04:06 LOG7[10620:11904]: 8 client connects (SSL_connect()) 2013.06.26 15:04:06 LOG7[10620:11904]: 8 client connects that finished 2013.06.26 15:04:06 LOG7[10620:11904]: 0 client renegotiations requested 2013.06.26 15:04:06 LOG7[10620:11904]: 0 server connects (SSL_accept()) 2013.06.26 15:04:06 LOG7[10620:11904]: 0 server connects that finished 2013.06.26 15:04:06 LOG7[10620:11904]: 0 server renegotiations requested 2013.06.26 15:04:06 LOG7[10620:11904]: 7 session cache hits 2013.06.26 15:04:06 LOG7[10620:11904]: 0 external session cache hits 2013.06.26 15:04:06 LOG7[10620:11904]: 0 session cache misses 2013.06.26 15:04:06 LOG7[10620:11904]: 0 session cache timeouts 2013.06.26 15:04:06 LOG6[10620:11904]: SSL connected: previous session reused 2013.06.26 15:04:06 LOG6[10620:11904]: SSL socket closed (SSL_read) 2013.06.26 15:04:06 LOG7[10620:11904]: Sent socket write shutdown 2013.06.26 15:04:06 LOG5[10620:11904]: Connection closed: 65 byte(s) sent to SSL, 290 byte(s) sent to socket 2013.06.26 15:04:06 LOG7[10620:11904]: Remote socket (FD=368) closed 2013.06.26 15:04:06 LOG7[10620:11904]: Local socket (FD=372) closed 2013.06.26 15:04:06 LOG7[10620:11904]: Service [smtps] finished (0 left) From: Stephen Gates [mailto:sgates@hkscholz.com] Sent: Wednesday, June 26, 2013 2:25 PM To: 'stunnel-users(a)stunnel.org' Subject: Sending Email from PLC Without Authentication with gmail A customer needs to send emails from a Programmable Logic Controller (PLC) which cannot provide authentication. The customer's email server is gmail which obviously requires authentication. The PLC IP is 192.168.1.2 and the PC IP on which stunnel is installed is 192.168.1.31 My config is: cert = stunnel.pem [smtps] client = yes accept = 25 connect = smtp.gmail.com:465 The PLC is set up to send emails to the IP of the PC 192.168.1.31 When I try to send emails I get the following in the stunnel log: 2013.06.26 14:26:30 LOG5[12384:13048]: Service [smtps] accepted connection from 192.168.1.2:2938 2013.06.26 14:26:30 LOG5[12384:13048]: connect_blocking: connected 74.125.130.108:465 2013.06.26 14:26:30 LOG5[12384:13048]: Service [smtps] connected remote server from 192.168.1.31:53599 Any help would be greatly appreciated! Stephen Gates Harold K. Scholz Company 7800 Serum Avenue Ralston, NE 68127 402-339-7600

1 0

Re: [stunnel-users] Sending Email from PLC Without Authentication with gmail
by Stephen Gates 26 Jun '13

26 Jun '13

I added the following as Bruce suggested. debug = 7 I tried doing output = stunnel.log but that cause an error when I reloded the config file. Here's the log after adding the above and trying to send another email. 2013.06.26 15:03:37 LOG7[10620:10992]: Service [smtps] (FD=416) bound to 0.0.0.0:25 2013.06.26 15:03:58 LOG7[10620:10992]: Service [smtps] accepted (FD=296) from 192.168.1.2:2946 2013.06.26 15:03:58 LOG7[10620:10992]: Creating a new thread 2013.06.26 15:03:58 LOG7[10620:10992]: New thread created 2013.06.26 15:03:58 LOG7[10620:10360]: Service [smtps] started 2013.06.26 15:03:58 LOG5[10620:10360]: Service [smtps] accepted connection from 192.168.1.2:2946 2013.06.26 15:03:58 LOG6[10620:10360]: connect_blocking: connecting 74.125.130.108:465 2013.06.26 15:03:58 LOG7[10620:10360]: connect_blocking: s_poll_wait 74.125.130.108:465: waiting 10 seconds 2013.06.26 15:03:58 LOG5[10620:10360]: connect_blocking: connected 74.125.130.108:465 2013.06.26 15:03:58 LOG5[10620:10360]: Service [smtps] connected remote server from 192.168.1.31:53640 2013.06.26 15:03:58 LOG7[10620:10360]: Remote socket (FD=368) initialized 2013.06.26 15:03:58 LOG7[10620:10360]: SNI: sending servername: smtp.gmail.com 2013.06.26 15:03:58 LOG7[10620:10360]: SSL state (connect): before/connect initialization 2013.06.26 15:03:58 LOG7[10620:10360]: SSL state (connect): SSLv3 write client hello A 2013.06.26 15:03:58 LOG7[10620:10360]: SSL state (connect): SSLv3 read server hello A 2013.06.26 15:03:58 LOG7[10620:10360]: SSL state (connect): SSLv3 read server certificate A 2013.06.26 15:03:58 LOG7[10620:10360]: SSL state (connect): SSLv3 read server done A 2013.06.26 15:03:58 LOG7[10620:10360]: SSL state (connect): SSLv3 write client key exchange A 2013.06.26 15:03:58 LOG7[10620:10360]: SSL state (connect): SSLv3 write change cipher spec A 2013.06.26 15:03:58 LOG7[10620:10360]: SSL state (connect): SSLv3 write finished A 2013.06.26 15:03:58 LOG7[10620:10360]: SSL state (connect): SSLv3 flush data 2013.06.26 15:03:58 LOG7[10620:10360]: SSL state (connect): SSLv3 read server session ticket A 2013.06.26 15:03:58 LOG7[10620:10360]: SSL state (connect): SSLv3 read finished A 2013.06.26 15:03:58 LOG7[10620:10360]: 1 items in the session cache 2013.06.26 15:03:58 LOG7[10620:10360]: 1 client connects (SSL_connect()) 2013.06.26 15:03:58 LOG7[10620:10360]: 1 client connects that finished 2013.06.26 15:03:58 LOG7[10620:10360]: 0 client renegotiations requested 2013.06.26 15:03:58 LOG7[10620:10360]: 0 server connects (SSL_accept()) 2013.06.26 15:03:58 LOG7[10620:10360]: 0 server connects that finished 2013.06.26 15:03:58 LOG7[10620:10360]: 0 server renegotiations requested 2013.06.26 15:03:58 LOG7[10620:10360]: 0 session cache hits 2013.06.26 15:03:58 LOG7[10620:10360]: 0 external session cache hits 2013.06.26 15:03:58 LOG7[10620:10360]: 0 session cache misses 2013.06.26 15:03:58 LOG7[10620:10360]: 0 session cache timeouts 2013.06.26 15:03:58 LOG7[10620:10360]: Peer certificate was cached (2266 bytes) 2013.06.26 15:03:58 LOG6[10620:10360]: SSL connected: new session negotiated 2013.06.26 15:03:58 LOG6[10620:10360]: Negotiated TLSv1/SSLv3 ciphersuite: AES128-SHA (128-bit encryption) 2013.06.26 15:03:58 LOG6[10620:10360]: Compression: null, expansion: null 2013.06.26 15:03:59 LOG6[10620:10360]: SSL socket closed (SSL_read) 2013.06.26 15:03:59 LOG7[10620:10360]: Sent socket write shutdown 2013.06.26 15:03:59 LOG5[10620:10360]: Connection closed: 65 byte(s) sent to SSL, 293 byte(s) sent to socket 2013.06.26 15:03:59 LOG7[10620:10360]: Remote socket (FD=368) closed 2013.06.26 15:03:59 LOG7[10620:10360]: Local socket (FD=296) closed 2013.06.26 15:03:59 LOG7[10620:10360]: Service [smtps] finished (0 left) 2013.06.26 15:03:59 LOG7[10620:10992]: Service [smtps] accepted (FD=364) from 192.168.1.2:2947 2013.06.26 15:03:59 LOG7[10620:10992]: Creating a new thread 2013.06.26 15:03:59 LOG7[10620:10992]: New thread created 2013.06.26 15:03:59 LOG7[10620:7792]: Service [smtps] started 2013.06.26 15:03:59 LOG5[10620:7792]: Service [smtps] accepted connection from 192.168.1.2:2947 2013.06.26 15:03:59 LOG6[10620:7792]: connect_blocking: connecting 74.125.130.109:465 2013.06.26 15:03:59 LOG7[10620:7792]: connect_blocking: s_poll_wait 74.125.130.109:465: waiting 10 seconds 2013.06.26 15:03:59 LOG5[10620:7792]: connect_blocking: connected 74.125.130.109:465 2013.06.26 15:03:59 LOG5[10620:7792]: Service [smtps] connected remote server from 192.168.1.31:53641 2013.06.26 15:03:59 LOG7[10620:7792]: Remote socket (FD=368) initialized 2013.06.26 15:03:59 LOG7[10620:7792]: SNI: sending servername: smtp.gmail.com 2013.06.26 15:03:59 LOG7[10620:7792]: SSL state (connect): before/connect initialization 2013.06.26 15:03:59 LOG7[10620:7792]: SSL state (connect): SSLv3 write client hello A 2013.06.26 15:03:59 LOG7[10620:7792]: SSL state (connect): SSLv3 read server hello A 2013.06.26 15:03:59 LOG7[10620:7792]: SSL state (connect): SSLv3 read finished A 2013.06.26 15:03:59 LOG7[10620:7792]: SSL state (connect): SSLv3 write change cipher spec A 2013.06.26 15:03:59 LOG7[10620:7792]: SSL state (connect): SSLv3 write finished A 2013.06.26 15:03:59 LOG7[10620:7792]: SSL state (connect): SSLv3 flush data 2013.06.26 15:03:59 LOG7[10620:7792]: 1 items in the session cache 2013.06.26 15:03:59 LOG7[10620:7792]: 2 client connects (SSL_connect()) 2013.06.26 15:03:59 LOG7[10620:7792]: 2 client connects that finished 2013.06.26 15:03:59 LOG7[10620:7792]: 0 client renegotiations requested 2013.06.26 15:03:59 LOG7[10620:7792]: 0 server connects (SSL_accept()) 2013.06.26 15:03:59 LOG7[10620:7792]: 0 server connects that finished 2013.06.26 15:03:59 LOG7[10620:7792]: 0 server renegotiations requested 2013.06.26 15:03:59 LOG7[10620:7792]: 1 session cache hits 2013.06.26 15:03:59 LOG7[10620:7792]: 0 external session cache hits 2013.06.26 15:03:59 LOG7[10620:7792]: 0 session cache misses 2013.06.26 15:03:59 LOG7[10620:7792]: 0 session cache timeouts 2013.06.26 15:03:59 LOG6[10620:7792]: SSL connected: previous session reused 2013.06.26 15:04:00 LOG6[10620:7792]: SSL socket closed (SSL_read) 2013.06.26 15:04:00 LOG7[10620:7792]: Sent socket write shutdown 2013.06.26 15:04:00 LOG5[10620:7792]: Connection closed: 65 byte(s) sent to SSL, 287 byte(s) sent to socket 2013.06.26 15:04:00 LOG7[10620:7792]: Remote socket (FD=368) closed 2013.06.26 15:04:00 LOG7[10620:7792]: Local socket (FD=364) closed 2013.06.26 15:04:00 LOG7[10620:7792]: Service [smtps] finished (0 left) 2013.06.26 15:04:00 LOG7[10620:10992]: Service [smtps] accepted (FD=372) from 192.168.1.2:2948 2013.06.26 15:04:00 LOG7[10620:10992]: Creating a new thread 2013.06.26 15:04:00 LOG7[10620:10992]: New thread created 2013.06.26 15:04:00 LOG7[10620:12944]: Service [smtps] started 2013.06.26 15:04:00 LOG5[10620:12944]: Service [smtps] accepted connection from 192.168.1.2:2948 2013.06.26 15:04:00 LOG6[10620:12944]: connect_blocking: connecting 74.125.130.108:465 2013.06.26 15:04:00 LOG7[10620:12944]: connect_blocking: s_poll_wait 74.125.130.108:465: waiting 10 seconds 2013.06.26 15:04:00 LOG5[10620:12944]: connect_blocking: connected 74.125.130.108:465 2013.06.26 15:04:00 LOG5[10620:12944]: Service [smtps] connected remote server from 192.168.1.31:53642 2013.06.26 15:04:00 LOG7[10620:12944]: Remote socket (FD=368) initialized 2013.06.26 15:04:00 LOG7[10620:12944]: SNI: sending servername: smtp.gmail.com 2013.06.26 15:04:00 LOG7[10620:12944]: SSL state (connect): before/connect initialization 2013.06.26 15:04:00 LOG7[10620:12944]: SSL state (connect): SSLv3 write client hello A 2013.06.26 15:04:00 LOG7[10620:12944]: SSL state (connect): SSLv3 read server hello A 2013.06.26 15:04:00 LOG7[10620:12944]: SSL state (connect): SSLv3 read finished A 2013.06.26 15:04:00 LOG7[10620:12944]: SSL state (connect): SSLv3 write change cipher spec A 2013.06.26 15:04:00 LOG7[10620:12944]: SSL state (connect): SSLv3 write finished A 2013.06.26 15:04:00 LOG7[10620:12944]: SSL state (connect): SSLv3 flush data 2013.06.26 15:04:00 LOG7[10620:12944]: 1 items in the session cache 2013.06.26 15:04:00 LOG7[10620:12944]: 3 client connects (SSL_connect()) 2013.06.26 15:04:00 LOG7[10620:12944]: 3 client connects that finished 2013.06.26 15:04:00 LOG7[10620:12944]: 0 client renegotiations requested 2013.06.26 15:04:00 LOG7[10620:12944]: 0 server connects (SSL_accept()) 2013.06.26 15:04:00 LOG7[10620:12944]: 0 server connects that finished 2013.06.26 15:04:00 LOG7[10620:12944]: 0 server renegotiations requested 2013.06.26 15:04:00 LOG7[10620:12944]: 2 session cache hits 2013.06.26 15:04:00 LOG7[10620:12944]: 0 external session cache hits 2013.06.26 15:04:00 LOG7[10620:12944]: 0 session cache misses 2013.06.26 15:04:00 LOG7[10620:12944]: 0 session cache timeouts 2013.06.26 15:04:00 LOG6[10620:12944]: SSL connected: previous session reused 2013.06.26 15:04:01 LOG6[10620:12944]: SSL socket closed (SSL_read) 2013.06.26 15:04:01 LOG7[10620:12944]: Sent socket write shutdown 2013.06.26 15:04:01 LOG5[10620:12944]: Connection closed: 65 byte(s) sent to SSL, 290 byte(s) sent to socket 2013.06.26 15:04:01 LOG7[10620:12944]: Remote socket (FD=368) closed 2013.06.26 15:04:01 LOG7[10620:12944]: Local socket (FD=372) closed 2013.06.26 15:04:01 LOG7[10620:12944]: Service [smtps] finished (0 left) 2013.06.26 15:04:01 LOG7[10620:10992]: Service [smtps] accepted (FD=288) from 192.168.1.2:2949 2013.06.26 15:04:01 LOG7[10620:10992]: Creating a new thread 2013.06.26 15:04:01 LOG7[10620:10992]: New thread created 2013.06.26 15:04:01 LOG7[10620:12900]: Service [smtps] started 2013.06.26 15:04:01 LOG5[10620:12900]: Service [smtps] accepted connection from 192.168.1.2:2949 2013.06.26 15:04:01 LOG6[10620:12900]: connect_blocking: connecting 74.125.130.109:465 2013.06.26 15:04:01 LOG7[10620:12900]: connect_blocking: s_poll_wait 74.125.130.109:465: waiting 10 seconds 2013.06.26 15:04:01 LOG5[10620:12900]: connect_blocking: connected 74.125.130.109:465 2013.06.26 15:04:01 LOG5[10620:12900]: Service [smtps] connected remote server from 192.168.1.31:53643 2013.06.26 15:04:01 LOG7[10620:12900]: Remote socket (FD=368) initialized 2013.06.26 15:04:01 LOG7[10620:12900]: SNI: sending servername: smtp.gmail.com 2013.06.26 15:04:01 LOG7[10620:12900]: SSL state (connect): before/connect initialization 2013.06.26 15:04:01 LOG7[10620:12900]: SSL state (connect): SSLv3 write client hello A 2013.06.26 15:04:01 LOG7[10620:12900]: SSL state (connect): SSLv3 read server hello A 2013.06.26 15:04:01 LOG7[10620:12900]: SSL state (connect): SSLv3 read finished A 2013.06.26 15:04:01 LOG7[10620:12900]: SSL state (connect): SSLv3 write change cipher spec A 2013.06.26 15:04:01 LOG7[10620:12900]: SSL state (connect): SSLv3 write finished A 2013.06.26 15:04:01 LOG7[10620:12900]: SSL state (connect): SSLv3 flush data 2013.06.26 15:04:01 LOG7[10620:12900]: 1 items in the session cache 2013.06.26 15:04:01 LOG7[10620:12900]: 4 client connects (SSL_connect()) 2013.06.26 15:04:01 LOG7[10620:12900]: 4 client connects that finished 2013.06.26 15:04:01 LOG7[10620:12900]: 0 client renegotiations requested 2013.06.26 15:04:01 LOG7[10620:12900]: 0 server connects (SSL_accept()) 2013.06.26 15:04:01 LOG7[10620:12900]: 0 server connects that finished 2013.06.26 15:04:01 LOG7[10620:12900]: 0 server renegotiations requested 2013.06.26 15:04:01 LOG7[10620:12900]: 3 session cache hits 2013.06.26 15:04:01 LOG7[10620:12900]: 0 external session cache hits 2013.06.26 15:04:01 LOG7[10620:12900]: 0 session cache misses 2013.06.26 15:04:01 LOG7[10620:12900]: 0 session cache timeouts 2013.06.26 15:04:01 LOG6[10620:12900]: SSL connected: previous session reused 2013.06.26 15:04:02 LOG6[10620:12900]: SSL socket closed (SSL_read) 2013.06.26 15:04:02 LOG7[10620:12900]: Sent socket write shutdown 2013.06.26 15:04:02 LOG5[10620:12900]: Connection closed: 65 byte(s) sent to SSL, 293 byte(s) sent to socket 2013.06.26 15:04:02 LOG7[10620:12900]: Remote socket (FD=368) closed 2013.06.26 15:04:02 LOG7[10620:12900]: Local socket (FD=288) closed 2013.06.26 15:04:02 LOG7[10620:12900]: Service [smtps] finished (0 left) 2013.06.26 15:04:02 LOG7[10620:10992]: Service [smtps] accepted (FD=292) from 192.168.1.2:2950 2013.06.26 15:04:02 LOG7[10620:10992]: Creating a new thread 2013.06.26 15:04:02 LOG7[10620:10992]: New thread created 2013.06.26 15:04:02 LOG7[10620:11560]: Service [smtps] started 2013.06.26 15:04:02 LOG5[10620:11560]: Service [smtps] accepted connection from 192.168.1.2:2950 2013.06.26 15:04:02 LOG6[10620:11560]: connect_blocking: connecting 74.125.130.108:465 2013.06.26 15:04:02 LOG7[10620:11560]: connect_blocking: s_poll_wait 74.125.130.108:465: waiting 10 seconds 2013.06.26 15:04:02 LOG5[10620:11560]: connect_blocking: connected 74.125.130.108:465 2013.06.26 15:04:02 LOG5[10620:11560]: Service [smtps] connected remote server from 192.168.1.31:53644 2013.06.26 15:04:02 LOG7[10620:11560]: Remote socket (FD=368) initialized 2013.06.26 15:04:02 LOG7[10620:11560]: SNI: sending servername: smtp.gmail.com 2013.06.26 15:04:02 LOG7[10620:11560]: SSL state (connect): before/connect initialization 2013.06.26 15:04:02 LOG7[10620:11560]: SSL state (connect): SSLv3 write client hello A 2013.06.26 15:04:02 LOG7[10620:11560]: SSL state (connect): SSLv3 read server hello A 2013.06.26 15:04:02 LOG7[10620:11560]: SSL state (connect): SSLv3 read finished A 2013.06.26 15:04:02 LOG7[10620:11560]: SSL state (connect): SSLv3 write change cipher spec A 2013.06.26 15:04:02 LOG7[10620:11560]: SSL state (connect): SSLv3 write finished A 2013.06.26 15:04:02 LOG7[10620:11560]: SSL state (connect): SSLv3 flush data 2013.06.26 15:04:02 LOG7[10620:11560]: 1 items in the session cache 2013.06.26 15:04:02 LOG7[10620:11560]: 5 client connects (SSL_connect()) 2013.06.26 15:04:02 LOG7[10620:11560]: 5 client connects that finished 2013.06.26 15:04:02 LOG7[10620:11560]: 0 client renegotiations requested 2013.06.26 15:04:02 LOG7[10620:11560]: 0 server connects (SSL_accept()) 2013.06.26 15:04:02 LOG7[10620:11560]: 0 server connects that finished 2013.06.26 15:04:02 LOG7[10620:11560]: 0 server renegotiations requested 2013.06.26 15:04:02 LOG7[10620:11560]: 4 session cache hits 2013.06.26 15:04:02 LOG7[10620:11560]: 0 external session cache hits 2013.06.26 15:04:02 LOG7[10620:11560]: 0 session cache misses 2013.06.26 15:04:02 LOG7[10620:11560]: 0 session cache timeouts 2013.06.26 15:04:02 LOG6[10620:11560]: SSL connected: previous session reused 2013.06.26 15:04:03 LOG6[10620:11560]: SSL socket closed (SSL_read) 2013.06.26 15:04:03 LOG7[10620:11560]: Sent socket write shutdown 2013.06.26 15:04:03 LOG5[10620:11560]: Connection closed: 65 byte(s) sent to SSL, 296 byte(s) sent to socket 2013.06.26 15:04:03 LOG7[10620:11560]: Remote socket (FD=368) closed 2013.06.26 15:04:03 LOG7[10620:11560]: Local socket (FD=292) closed 2013.06.26 15:04:03 LOG7[10620:11560]: Service [smtps] finished (0 left) 2013.06.26 15:04:03 LOG7[10620:10992]: Service [smtps] accepted (FD=296) from 192.168.1.2:2951 2013.06.26 15:04:03 LOG7[10620:10992]: Creating a new thread 2013.06.26 15:04:03 LOG7[10620:10992]: New thread created 2013.06.26 15:04:03 LOG7[10620:10092]: Service [smtps] started 2013.06.26 15:04:03 LOG5[10620:10092]: Service [smtps] accepted connection from 192.168.1.2:2951 2013.06.26 15:04:03 LOG6[10620:10092]: connect_blocking: connecting 74.125.130.109:465 2013.06.26 15:04:03 LOG7[10620:10092]: connect_blocking: s_poll_wait 74.125.130.109:465: waiting 10 seconds 2013.06.26 15:04:03 LOG5[10620:10092]: connect_blocking: connected 74.125.130.109:465 2013.06.26 15:04:03 LOG5[10620:10092]: Service [smtps] connected remote server from 192.168.1.31:53645 2013.06.26 15:04:03 LOG7[10620:10092]: Remote socket (FD=368) initialized 2013.06.26 15:04:03 LOG7[10620:10092]: SNI: sending servername: smtp.gmail.com 2013.06.26 15:04:03 LOG7[10620:10092]: SSL state (connect): before/connect initialization 2013.06.26 15:04:03 LOG7[10620:10092]: SSL state (connect): SSLv3 write client hello A 2013.06.26 15:04:03 LOG7[10620:10092]: SSL state (connect): SSLv3 read server hello A 2013.06.26 15:04:03 LOG7[10620:10092]: SSL state (connect): SSLv3 read finished A 2013.06.26 15:04:03 LOG7[10620:10092]: SSL state (connect): SSLv3 write change cipher spec A 2013.06.26 15:04:03 LOG7[10620:10092]: SSL state (connect): SSLv3 write finished A 2013.06.26 15:04:03 LOG7[10620:10092]: SSL state (connect): SSLv3 flush data 2013.06.26 15:04:03 LOG7[10620:10092]: 1 items in the session cache 2013.06.26 15:04:03 LOG7[10620:10092]: 6 client connects (SSL_connect()) 2013.06.26 15:04:03 LOG7[10620:10092]: 6 client connects that finished 2013.06.26 15:04:03 LOG7[10620:10092]: 0 client renegotiations requested 2013.06.26 15:04:03 LOG7[10620:10092]: 0 server connects (SSL_accept()) 2013.06.26 15:04:03 LOG7[10620:10092]: 0 server connects that finished 2013.06.26 15:04:03 LOG7[10620:10092]: 0 server renegotiations requested 2013.06.26 15:04:03 LOG7[10620:10092]: 5 session cache hits 2013.06.26 15:04:03 LOG7[10620:10092]: 0 external session cache hits 2013.06.26 15:04:03 LOG7[10620:10092]: 0 session cache misses 2013.06.26 15:04:03 LOG7[10620:10092]: 0 session cache timeouts 2013.06.26 15:04:03 LOG6[10620:10092]: SSL connected: previous session reused 2013.06.26 15:04:04 LOG6[10620:10092]: SSL socket closed (SSL_read) 2013.06.26 15:04:04 LOG7[10620:10092]: Sent socket write shutdown 2013.06.26 15:04:04 LOG5[10620:10092]: Connection closed: 65 byte(s) sent to SSL, 290 byte(s) sent to socket 2013.06.26 15:04:04 LOG7[10620:10092]: Remote socket (FD=368) closed 2013.06.26 15:04:04 LOG7[10620:10092]: Local socket (FD=296) closed 2013.06.26 15:04:04 LOG7[10620:10092]: Service [smtps] finished (0 left) 2013.06.26 15:04:04 LOG7[10620:10992]: Service [smtps] accepted (FD=364) from 192.168.1.2:2952 2013.06.26 15:04:04 LOG7[10620:10992]: Creating a new thread 2013.06.26 15:04:04 LOG7[10620:10992]: New thread created 2013.06.26 15:04:04 LOG7[10620:1404]: Service [smtps] started 2013.06.26 15:04:04 LOG5[10620:1404]: Service [smtps] accepted connection from 192.168.1.2:2952 2013.06.26 15:04:04 LOG6[10620:1404]: connect_blocking: connecting 74.125.130.108:465 2013.06.26 15:04:04 LOG7[10620:1404]: connect_blocking: s_poll_wait 74.125.130.108:465: waiting 10 seconds 2013.06.26 15:04:04 LOG5[10620:1404]: connect_blocking: connected 74.125.130.108:465 2013.06.26 15:04:04 LOG5[10620:1404]: Service [smtps] connected remote server from 192.168.1.31:53646 2013.06.26 15:04:04 LOG7[10620:1404]: Remote socket (FD=368) initialized 2013.06.26 15:04:04 LOG7[10620:1404]: SNI: sending servername: smtp.gmail.com 2013.06.26 15:04:04 LOG7[10620:1404]: SSL state (connect): before/connect initialization 2013.06.26 15:04:04 LOG7[10620:1404]: SSL state (connect): SSLv3 write client hello A 2013.06.26 15:04:05 LOG7[10620:1404]: SSL state (connect): SSLv3 read server hello A 2013.06.26 15:04:05 LOG7[10620:1404]: SSL state (connect): SSLv3 read finished A 2013.06.26 15:04:05 LOG7[10620:1404]: SSL state (connect): SSLv3 write change cipher spec A 2013.06.26 15:04:05 LOG7[10620:1404]: SSL state (connect): SSLv3 write finished A 2013.06.26 15:04:05 LOG7[10620:1404]: SSL state (connect): SSLv3 flush data 2013.06.26 15:04:05 LOG7[10620:1404]: 1 items in the session cache 2013.06.26 15:04:05 LOG7[10620:1404]: 7 client connects (SSL_connect()) 2013.06.26 15:04:05 LOG7[10620:1404]: 7 client connects that finished 2013.06.26 15:04:05 LOG7[10620:1404]: 0 client renegotiations requested 2013.06.26 15:04:05 LOG7[10620:1404]: 0 server connects (SSL_accept()) 2013.06.26 15:04:05 LOG7[10620:1404]: 0 server connects that finished 2013.06.26 15:04:05 LOG7[10620:1404]: 0 server renegotiations requested 2013.06.26 15:04:05 LOG7[10620:1404]: 6 session cache hits 2013.06.26 15:04:05 LOG7[10620:1404]: 0 external session cache hits 2013.06.26 15:04:05 LOG7[10620:1404]: 0 session cache misses 2013.06.26 15:04:05 LOG7[10620:1404]: 0 session cache timeouts 2013.06.26 15:04:05 LOG6[10620:1404]: SSL connected: previous session reused 2013.06.26 15:04:05 LOG6[10620:1404]: SSL socket closed (SSL_read) 2013.06.26 15:04:05 LOG7[10620:1404]: Sent socket write shutdown 2013.06.26 15:04:05 LOG5[10620:1404]: Connection closed: 65 byte(s) sent to SSL, 290 byte(s) sent to socket 2013.06.26 15:04:05 LOG7[10620:1404]: Remote socket (FD=368) closed 2013.06.26 15:04:05 LOG7[10620:1404]: Local socket (FD=364) closed 2013.06.26 15:04:05 LOG7[10620:1404]: Service [smtps] finished (0 left) 2013.06.26 15:04:05 LOG7[10620:10992]: Service [smtps] accepted (FD=372) from 192.168.1.2:2953 2013.06.26 15:04:05 LOG7[10620:10992]: Creating a new thread 2013.06.26 15:04:05 LOG7[10620:10992]: New thread created 2013.06.26 15:04:05 LOG7[10620:11904]: Service [smtps] started 2013.06.26 15:04:05 LOG5[10620:11904]: Service [smtps] accepted connection from 192.168.1.2:2953 2013.06.26 15:04:05 LOG6[10620:11904]: connect_blocking: connecting 74.125.130.109:465 2013.06.26 15:04:05 LOG7[10620:11904]: connect_blocking: s_poll_wait 74.125.130.109:465: waiting 10 seconds 2013.06.26 15:04:06 LOG5[10620:11904]: connect_blocking: connected 74.125.130.109:465 2013.06.26 15:04:06 LOG5[10620:11904]: Service [smtps] connected remote server from 192.168.1.31:53647 2013.06.26 15:04:06 LOG7[10620:11904]: Remote socket (FD=368) initialized 2013.06.26 15:04:06 LOG7[10620:11904]: SNI: sending servername: smtp.gmail.com 2013.06.26 15:04:06 LOG7[10620:11904]: SSL state (connect): before/connect initialization 2013.06.26 15:04:06 LOG7[10620:11904]: SSL state (connect): SSLv3 write client hello A 2013.06.26 15:04:06 LOG7[10620:11904]: SSL state (connect): SSLv3 read server hello A 2013.06.26 15:04:06 LOG7[10620:11904]: SSL state (connect): SSLv3 read finished A 2013.06.26 15:04:06 LOG7[10620:11904]: SSL state (connect): SSLv3 write change cipher spec A 2013.06.26 15:04:06 LOG7[10620:11904]: SSL state (connect): SSLv3 write finished A 2013.06.26 15:04:06 LOG7[10620:11904]: SSL state (connect): SSLv3 flush data 2013.06.26 15:04:06 LOG7[10620:11904]: 1 items in the session cache 2013.06.26 15:04:06 LOG7[10620:11904]: 8 client connects (SSL_connect()) 2013.06.26 15:04:06 LOG7[10620:11904]: 8 client connects that finished 2013.06.26 15:04:06 LOG7[10620:11904]: 0 client renegotiations requested 2013.06.26 15:04:06 LOG7[10620:11904]: 0 server connects (SSL_accept()) 2013.06.26 15:04:06 LOG7[10620:11904]: 0 server connects that finished 2013.06.26 15:04:06 LOG7[10620:11904]: 0 server renegotiations requested 2013.06.26 15:04:06 LOG7[10620:11904]: 7 session cache hits 2013.06.26 15:04:06 LOG7[10620:11904]: 0 external session cache hits 2013.06.26 15:04:06 LOG7[10620:11904]: 0 session cache misses 2013.06.26 15:04:06 LOG7[10620:11904]: 0 session cache timeouts 2013.06.26 15:04:06 LOG6[10620:11904]: SSL connected: previous session reused 2013.06.26 15:04:06 LOG6[10620:11904]: SSL socket closed (SSL_read) 2013.06.26 15:04:06 LOG7[10620:11904]: Sent socket write shutdown 2013.06.26 15:04:06 LOG5[10620:11904]: Connection closed: 65 byte(s) sent to SSL, 290 byte(s) sent to socket 2013.06.26 15:04:06 LOG7[10620:11904]: Remote socket (FD=368) closed 2013.06.26 15:04:06 LOG7[10620:11904]: Local socket (FD=372) closed 2013.06.26 15:04:06 LOG7[10620:11904]: Service [smtps] finished (0 left) From: Stephen Gates [mailto:sgates@hkscholz.com] Sent: Wednesday, June 26, 2013 2:25 PM To: 'stunnel-users(a)stunnel.org' Subject: Sending Email from PLC Without Authentication with gmail A customer needs to send emails from a Programmable Logic Controller (PLC) which cannot provide authentication. The customer's email server is gmail which obviously requires authentication. The PLC IP is 192.168.1.2 and the PC IP on which stunnel is installed is 192.168.1.31 My config is: cert = stunnel.pem [smtps] client = yes accept = 25 connect = smtp.gmail.com:465 The PLC is set up to send emails to the IP of the PC 192.168.1.31 When I try to send emails I get the following in the stunnel log: 2013.06.26 14:26:30 LOG5[12384:13048]: Service [smtps] accepted connection from 192.168.1.2:2938 2013.06.26 14:26:30 LOG5[12384:13048]: connect_blocking: connected 74.125.130.108:465 2013.06.26 14:26:30 LOG5[12384:13048]: Service [smtps] connected remote server from 192.168.1.31:53599 Any help would be greatly appreciated! Stephen Gates Harold K. Scholz Company 7800 Serum Avenue Ralston, NE 68127 402-339-7600

1 0

stunnel FIPS mode 140-2/ Other Modes
by mehmet ozisik 24 Jun '13

24 Jun '13

Hi All, I would like to ask a question about stunnel fips mode. There are lots of question and answers on the internet related with this, but I could not find any answer related with mine. I am compiling with openssl (auto detecting fips) . Here is a part of confgiure output : checking for FIPS_mode_set... yes configure: FIPS mode detected So I am thinking that fips also is being included. Then I try to run stunnel on target platform (in stunnel.conf fips=yes) and it gives below error : Compiled/running with OpenSSL 0.9.8w-fips 23 Apr 2012 Threading:PTHREAD Sockets:POLL,IPv6 SSL:ENGINE,OCSP,FIPS Reading configuration from file stunnel.conf FIPS_mode_set: 2D06906E: error:2D06906E:FIPS routines:FIPS_CHECK_INCORE_FINGERPRINT:fingerprint does not match there are lots of information about this errror on internet. Then when I configure stunnel.conf with fips=no, stunnel is running successfully. I know that fips=yes means that enables FIPS 140-2 mode and I guess my fips canister does not supoort fips 140-2 mode (I do not know which fips mode it has supported). Now my question is coming : When I set fips=no, stunnel also starts with other available fips modes which the canister included? Or it skips running fips mode completely? Plase inform me if anyone has any idea? Regards

1 0

Re: [stunnel-users] "Broken pipe" issue
by Ron McWilliams 21 Jun '13

21 Jun '13

I have the same issue with the broken pipe on my stunnel. Here is the revealing log clip. appsadmin@MIRTHTEST:/etc/stunnel.d$ sudo tail -f /var/log/stunnel_mirth.log 2013.06.21 17:28:03 LOG7[30980:3077569344]: Service hl7_client prod finished (1 left) 2013.06.21 17:28:03 LOG7[30980:3077569344]: str_stats: 0 block(s), 0 data byte(s), 0 control byte(s) 2013.06.21 17:28:14 LOG6[30980:3073227584]: SSL connected: previous session reused 2013.06.21 17:28:14 LOG7[30980:3073227584]: Socket closed on read 2013.06.21 17:28:14 LOG7[30980:3073227584]: Sending SSL write shutdown 2013.06.21 17:28:14 LOG6[30980:3073227584]: SSL_shutdown successfully sent close_notify 2013.06.21 17:28:24 LOG5[30980:3073227584]: Error detected on socket (read) file descriptor: Broken pipe (32) 2013.06.21 17:28:24 LOG5[30980:3073227584]: Connection reset: 661 bytes sent to SSL, 124 bytes sent to socket 2013.06.21 17:28:24 LOG7[30980:3073227584]: Service hl7_client prod finished (0 left) 2013.06.21 17:28:24 LOG7[30980:3073227584]: str_stats: 0 block(s), 0 data byte(s), 0 control byte(s) Was there a simple edit to the conf file and if so, could you send the sample settings. Thank you, rmcwilli

1 0

Re: [stunnel-users] Broken pipes and TCP resets on parallel requests over stunnel
by Ron McWilliams 21 Jun '13

21 Jun '13

I have essentially the same issue. We were successfully sending messages and receiving ACK prior to this glitch. I am on Ubuntu 12.04 LTS using stunnel 4.50. appsadmin@MIRTHTEST:/etc/stunnel.d$ sudo tail -f /var/log/stunnel_mirth.log 2013.06.21 17:28:03 LOG7[30980:3077569344]: Service hl7_client prod finished (1 left) 2013.06.21 17:28:03 LOG7[30980:3077569344]: str_stats: 0 block(s), 0 data byte(s), 0 control byte(s) 2013.06.21 17:28:14 LOG6[30980:3073227584]: SSL connected: previous session reused 2013.06.21 17:28:14 LOG7[30980:3073227584]: Socket closed on read 2013.06.21 17:28:14 LOG7[30980:3073227584]: Sending SSL write shutdown 2013.06.21 17:28:14 LOG6[30980:3073227584]: SSL_shutdown successfully sent close_notify 2013.06.21 17:28:24 LOG5[30980:3073227584]: Error detected on socket (read) file descriptor: Broken pipe (32) 2013.06.21 17:28:24 LOG5[30980:3073227584]: Connection reset: 661 bytes sent to SSL, 124 bytes sent to socket 2013.06.21 17:28:24 LOG7[30980:3073227584]: Service hl7_client prod finished (0 left) 2013.06.21 17:28:24 LOG7[30980:3073227584]: str_stats: 0 block(s), 0 data byte(s), 0 control byte(s) rmcwilli

1 0

certificate verify failed
by Roman Tuchyna 19 Jun '13

19 Jun '13

Hi All, I'm trying to create SSl tunnel between my server (Win 2008 R2, 4.56 version of stunnel) and remote application server - I have merged both root and sub certificate into 1 file and it looks like it can verify them and accept them as well, but then it tries to verify it at depth=0 and says certificate not found in local repository. Am I missing anything here ? (I modified messages to not disclose details of certificates in the debug below). Thank you! BR, Roman 2013.06.18 11:22:34 LOG7[272:2156]: Service [SZX] started 2013.06.18 11:22:34 LOG5[272:2156]: Service [SZX] accepted connection from 127.0.0.1:49397 2013.06.18 11:22:34 LOG6[272:2156]: connect_blocking: connecting 10.254.0.21:443 2013.06.18 11:22:34 LOG7[272:2156]: connect_blocking: s_poll_wait 10.254.0.21:443: waiting 10 seconds 2013.06.18 11:22:34 LOG5[272:2156]: connect_blocking: connected 10.254.0.21:443 2013.06.18 11:22:34 LOG5[272:2156]: Service [SZX] connected remote server from 192.168.20.23:49398 2013.06.18 11:22:34 LOG7[272:2156]: Remote socket (FD=396) initialized 2013.06.18 11:22:34 LOG7[272:2156]: SNI: sending servername: 10.254.0.21 2013.06.18 11:22:34 LOG7[272:2156]: SSL state (connect): before/connect initialization 2013.06.18 11:22:34 LOG7[272:2156]: SSL state (connect): SSLv3 write client hello A 2013.06.18 11:22:34 LOG7[272:2156]: SSL state (connect): SSLv3 read server hello A 2013.06.18 11:22:34 LOG7[272:2156]: Starting certificate verification: depth=2, /CN=xxx RootCA 2013.06.18 11:22:34 LOG5[272:2156]: Certificate accepted: depth=2, /CN=xxx RootCA 2013.06.18 11:22:34 LOG7[272:2156]: Starting certificate verification: depth=1, /CN=xxx 2013.06.18 11:22:34 LOG5[272:2156]: Certificate accepted: depth=1, /CN=xxx SubCA1 2013.06.18 11:22:34 LOG7[272:2156]: Starting certificate verification: depth=0, /C=zzz 2013.06.18 11:22:34 LOG4[272:2156]: CERT: Certificate not found in local repository 2013.06.18 11:22:34 LOG4[272:2156]: Certificate check failed: depth=0, /C=zzz 2013.06.18 11:22:34 LOG7[272:2156]: SSL alert (write): fatal: certificate unknown 2013.06.18 11:22:34 LOG3[272:2156]: SSL_connect: 14090086: error:14090086:SSL routines:SSL3_GET_SERVER_CERTIFICATE:certificate verify failed 2013.06.18 11:22:34 LOG5[272:2156]: Connection reset: 0 byte(s) sent to SSL, 0 byte(s) sent to socket 2013.06.18 11:22:34 LOG7[272:2156]: Remote socket (FD=396) closed 2013.06.18 11:22:34 LOG7[272:2156]: Local socket (FD=376) closed 2013.06.18 11:22:34 LOG7[272:2156]: Service [SZX] finished (0 left)

3 2

stunnel RHEL 6.3 and HTTPS header fields
by xxxxxxxxxxxxxxxxx 16 Jun '13

16 Jun '13

I'm an Stunnel newbie so forgive me if this question has been asked previously. I am using stunnel to accept a connection from http://127.0.0.1:someport/url/to/wsdland connect to hostname.somewhere.abc:443 Everything is working fine with the exception of a certain endpoint that responds with an HTTP status code of 403 "forbidden". What I have determined is that the server is rejecting the request due to the HTTP "Host:" field value, it's set to 127.0.0.1. Is there anyway to pass the value of the config file "connect" property instead (in my case "hostname.somewhere")?I have tried various config settings without success. Config entry: [testnesiis]client = yesaccept = 127.0.0.1:1445connect = testnesiis:443;protocolHost = testnesiis:443protocol = proxy;sni = testnesiis;transparent = both Thanks and Kudos to the authors of stunnel !

2 1

Certificate failure to verify with verify = 4 option
by Thomas Eifert 16 Jun '13

16 Jun '13

Greetings; Stunnel 4.56 running under Win 7 SP1 x86. Recently, the owners of a server I regularly connect to updated their server certificate; the former had expired at the end of May. As soon as that event occurred, I deleted the old certificate, then used the "save peer certificate" function of Stunnel to get the updated one. However, the new certificate fails to verify, even with the verify = 4 option in Stunnel. The error message is similar to what I used to get when doing a verify = 3 with some certificates. The general error output of Stunnel is: CERT: Verification error: unable to get local issuer certificate 2013.06.09 16:37:46 LOG4[608:2336]: Certificate check failed: depth=0 When I open the new certificate with: openssl x509 -text -in certname.pem and view the certificate details, I'm not seeing anything obvious. The certificate is within a valid date range, and contains the same basic elements as other certs I've viewed. The certificate appears to have been issued by Startcom LLC. If I comment out the verify statement, I'm able to successfully negotiate an SSL connection with the server. I realize that this may be more of an openssl issue than an issue with Stunnel. Nevertheless, I thought I'd start here and throw it out to the floor for comments. Anyone have any ideas or have run into this issue? Regards, Thomas -- Attention: This message and all attachments are private and may contain information that is confidential and privileged. If you received this message in error, please notify the sender by reply email and delete the message immediately.

2 2

tuning/multiple stunnel instance
by William Kwan 13 Jun '13

13 Jun '13

Dear all, I would like to find out if there's anyway to tune stunnel or what's the best practice you would recommend. I have a bit more than 100 sessions defined in stunnel.conf. It appears that clients started to see latency increase. Would you say 1. Split the conf file to multiple conf files and start multiple stunnel with each conf file? 2. Any way to tune stunnel to run muliple process with more threads? 3. Any other options? Thanks Will

2 1

stunnel doesn't create tunnel
by Roman Tuchyna 13 Jun '13

13 Jun '13

Hi All, I'm trying to create SSL tunnel between my server and remote application server and according to log file, stunnel fails to 0.0.0.0:43 Service [SZR] (FD=716) bound to 0.0.0.0:443 (although connect and accept are configured for this service). I'm using stunnel on Windows and apparently I'm doing something wrong - any hint or advice would be appreciated. I was searching for the reason, but couldn't find any pointer... Thank you! BR, Roman 2013.06.13 16:25:19 LOG7[2884:3032]: Dispatching signals from the signal pipe 2013.06.13 16:25:19 LOG7[2884:3032]: Processing SIGNAL_RELOAD_CONFIG 2013.06.13 16:25:19 LOG5[2884:3032]: Reading configuration from file stunnel.conf 2013.06.13 16:25:19 LOG5[2884:3032]: FIPS mode is enabled 2013.06.13 16:25:19 LOG7[2884:3032]: Compression not enabled 2013.06.13 16:25:19 LOG7[2884:3032]: Snagged 64 random bytes from C:/.rnd 2013.06.13 16:25:19 LOG7[2884:3032]: Wrote 1024 new random bytes to C:/.rnd 2013.06.13 16:25:19 LOG7[2884:3032]: PRNG seeded successfully 2013.06.13 16:25:19 LOG6[2884:3032]: Initializing service [SZR] 2013.06.13 16:25:19 LOG7[2884:3032]: Loaded verify certificates from SZR.pem 2013.06.13 16:25:19 LOG7[2884:3032]: Loaded SZR.pem revocation lookup file 2013.06.13 16:25:19 LOG7[2884:3032]: SSL options set: 0x01000004 2013.06.13 16:25:19 LOG5[2884:3032]: Configuration successful 2013.06.13 16:25:19 LOG7[2884:3032]: Closing service [SZR] 2013.06.13 16:25:19 LOG7[2884:3032]: Service [SZR] closed (FD=716) 2013.06.13 16:25:19 LOG7[2884:3032]: Sessions cached before flush: 0 2013.06.13 16:25:19 LOG7[2884:3032]: Sessions cached after flush: 0 2013.06.13 16:25:19 LOG7[2884:3032]: Service [SZR] closed 2013.06.13 16:25:19 LOG7[2884:3032]: Service [SZR] (FD=716) bound to 0.0.0.0:443 2013.06.13 16:25:19 LOG7[2884:3032]: Signal pipe is empty

1 0

Re: [stunnel-users] Getting Stunnel working with Verizon.net SMTP
by Gary Kuznitz 13 Jun '13

13 Jun '13

Hi Jochen, With your help I selected "Do not use CRAM-MD5 authentication even if it is advertised" It's now woking. Thank you very much for your help. Do you know if there is any way to remove the emails with the user name and password from the archives? Thanks, Gary On 12 Jun 2013 at 23:08, Jochen (Jochen Bern <Jochen.Bern(a)LINworks.de>) commented about Re: [stunnel-users] Getting Stunnel working with : > On 12.06.2013 21:28, Gary Kuznitz wrote: > > On your first post I didn't see the difference in port numbers. I have corrected that. > > I'm getting this log from my email client: > > --- Wed, 12 Jun 2013 12:22:46 --- > > Connect to 'localhost' port 10115, timeout 60. > > 12:22:46.960 [*] Connection established to 127.0.0.1 > > 12:22:47.226 >> 0120 220 vms173007pub.verizon.net -- Server ESMTP (Sun Java(tm) > > System Messaging Server 7u2-7.02 32bit (built Apr 16 2009))\0D\0A > > First and foremost, this shows that your e-mail client can now talk to > the server, which means that stunnel's job (the SSL negotiation) gets > done successfully. > > > 12:22:47.288 >> 0042 250-AUTH DIGEST-MD5 PLAIN LOGIN CRAM-MD5\0D\0A > > 12:22:47.288 >> 0022 250-AUTH=LOGIN PLAIN\0D\0A > > This part of the server's reply to the EHLO command shows the auth > mechanisms the server supports; CRAM-MD5 is listed ... > > > 12:22:47.288 << 0015 AUTH CRAM-MD5\0D\0A > > ... and your client requests it. > > > 12:22:47.335 >> 0050 334 PDEzNTYyOTY5MjEuMTIxMTA1NTFAdm1zMTczMDA3Pg==\0D\0A > > The servers issues (a base64 encoded version of) > "<1356296921.12110551@vms173007>" as a "random" string challenge. > > > 12:22:47.335 << 0058 YXR1cHJlcyBkYTlmZTI3MWFjODNjYWUxOTVjNmZhZWQ5ZGE0NTUzYg==\0D\0A > > This is a base64 encoded version of "atupres > da9fe271ac83cae195c6faed9da4553b". "atupres" should be your username and > da9fe271ac83cae195c6faed9da4553b the HMAC-MD5 digest of the challenge > with your password as the key. > > I don't know a tool to compute HMAC-MD5 digests that is readily > available under Windows, I'm afraid. If you're desperate, try > http://www.freeformatter.com/hmac-generator.html > (note that they won't know a) on which server and b) with what username > you'll be using the password ...). > > > 12:22:47.397 >> 0066 500 5.7.0 Unknown AUTH error -1 (Internal authentication error).\0D\0A > > ... and there the server says it cannot verify that. > > > Do you have any idea why I am getting [that]? > > I can think of several *possible* reasons, but ultimately, the server > doesn't tell us what exactly is wrong. > > 1. It may be that the server is announcing CRAM-MD5 auth though it > actually does *not* support it. (The DIGEST-MD5 and CRAM-MD5 mechs > require that the server *knows* the (plaintext) password, while for > PLAIN and LOGIN, storing only a hash of the password is enough, and > foils attackers who manage to steal a copy of the password database.) > Enforcing use of a different mechanism can probably be done through > your e-mail client's settings, but I'm afraid that it's usually > rather cryptic how exactly to do that ... > If you want to have a *manual* try at another mech, here's a web > page explaining what to input for PLAIN and LOGIN: > http://www.gadgetwiz.com/protocols/smtp-auth-example.html > and here's an MS KB article with a base64 en-/decoder: > http://support.microsoft.com/kb/191239 > Problem is that the strings to be base64 encoded are supposed *not* > to have an end-of-line, and sometimes even to contain NUL bytes > ("\0") ... Verify that your method of choice properly reproduces the > examples in the howto page. :-C > 2. I'm a bit surprised that your username supposedly is "atupres", > rather than "atupres(a)your.dom.ain", "atupres%your.dom.ain" or > something to that effect ... ? > 3. The obvious one, a mistyped password ... > > Regards, > J. Bern > -- > *NEU* - NEC IT-Infrastruktur-Produkte im <http://www.linworks-shop.de/>: > Server--Storage--Virtualisierung--Management SW--Passion for Performance > Jochen Bern, Systemingenieur --- LINworks GmbH <http://www.LINworks.de/> > Postfach 100121, 64201 Darmstadt | Robert-Koch-Str. 9, 64331 Weiterstadt > PGP (1024D/4096g) FP = D18B 41B1 16C0 11BA 7F8C DCF7 E1D5 FAF4 444E 1C27 > Tel. +49 6151 9067-231, Zentr. -0, Fax -299 - Amtsg. Darmstadt HRB 85202 > Unternehmenssitz Weiterstadt, Geschäftsführer Metin Dogan, Oliver Michel

2 1

Re: [stunnel-users] Getting Stunnel working with Verizon.net SMTP
by Gary Kuznitz 12 Jun '13

12 Jun '13

Thank you very much for working with me on resolving this. On your first post I didn't see the difference in port numbers. I have corrected that. Thank you for catching it. It did get me closer to resolving the issue. I'm getting this log from my email client: --- Wed, 12 Jun 2013 12:22:46 --- Connect to 'localhost' port 10115, timeout 60. 12:22:46.960 [*] Connection established to 127.0.0.1 12:22:47.226 >> 0120 220 vms173007pub.verizon.net -- Server ESMTP (Sun Java(tm) System Messaging Server 7u2-7.02 32bit (built Apr 16 2009))\0D\0A 12:22:47.226 << 0023 EHLO [192.168.168.11]\0D\0A 12:22:47.288 >> 0030 250-vms173007pub.verizon.net\0D\0A 12:22:47.288 >> 0014 250-8BITMIME\0D\0A 12:22:47.288 >> 0016 250-PIPELINING\0D\0A 12:22:47.288 >> 0014 250-CHUNKING\0D\0A 12:22:47.288 >> 0009 250-DSN\0D\0A 12:22:47.288 >> 0025 250-ENHANCEDSTATUSCODES\0D\0A 12:22:47.288 >> 0010 250-HELP\0D\0A 12:22:47.288 >> 0044 250-XLOOP AD6DF29B04183351BAD9935B9A483ABE\0D\0A 12:22:47.288 >> 0042 250-AUTH DIGEST-MD5 PLAIN LOGIN CRAM-MD5\0D\0A 12:22:47.288 >> 0022 250-AUTH=LOGIN PLAIN\0D\0A 12:22:47.288 >> 0010 250-ETRN\0D\0A 12:22:47.288 >> 0019 250-NO-SOLICITING\0D\0A 12:22:47.288 >> 0019 250 SIZE 20971520\0D\0A 12:22:47.288 << 0015 AUTH CRAM-MD5\0D\0A 12:22:47.335 >> 0050 334 PDEzNTYyOTY5MjEuMTIxMTA1NTFAdm1zMTczMDA3Pg==\0D\0A 12:22:47.335 << 0058 YXR1cHJlcyBkYTlmZTI3MWFjODNjYWUxOTVjNmZhZWQ5ZGE0NTUzYg==\0D\0A 12:22:47.397 >> 0066 500 5.7.0 Unknown AUTH error -1 (Internal authentication error).\0D\0A 12:22:50.845 << 0006 QUIT\0D\0A 12:22:50.892 >> 0034 221 2.3.0 Bye received. Goodbye.\0D\0A 12:22:50.892 --- Connection closed normally at Wed, 12 Jun 2013 12:22:50. ---\0A\0A I'm getting this in the Stunnel.log 2013.06.12 12:22:46 LOG7[660:2460]: New thread created 2013.06.12 12:22:46 LOG7[660:896]: Service [Verizon-smtp] started 2013.06.12 12:22:46 LOG5[660:896]: Service [Verizon-smtp] accepted connection from 127.0.0.1:52721 2013.06.12 12:22:46 LOG6[660:896]: connect_blocking: connecting 206.46.232.12:465 2013.06.12 12:22:46 LOG7[660:896]: connect_blocking: s_poll_wait 206.46.232.12:465: waiting 10 seconds 2013.06.12 12:22:46 LOG5[660:896]: connect_blocking: connected 206.46.232.12:465 2013.06.12 12:22:46 LOG5[660:896]: Service [Verizon-smtp] connected remote server from 192.168.168.11:52722 2013.06.12 12:22:46 LOG7[660:896]: Remote socket (FD=384) initialized 2013.06.12 12:22:46 LOG7[660:896]: SNI: sending servername: outgoing.verizon.net 2013.06.12 12:22:46 LOG7[660:896]: SSL state (connect): before/connect initialization 2013.06.12 12:22:46 LOG7[660:896]: SSL state (connect): SSLv3 write client hello A 2013.06.12 12:22:46 LOG7[660:896]: SSL state (connect): SSLv3 read server hello A 2013.06.12 12:22:46 LOG7[660:896]: SSL state (connect): SSLv3 read server certificate A 2013.06.12 12:22:46 LOG7[660:896]: SSL state (connect): SSLv3 read server key exchange A 2013.06.12 12:22:46 LOG7[660:896]: SSL state (connect): SSLv3 read server done A 2013.06.12 12:22:46 LOG7[660:896]: SSL state (connect): SSLv3 write client key exchange A 2013.06.12 12:22:46 LOG7[660:896]: SSL state (connect): SSLv3 write change cipher spec A 2013.06.12 12:22:46 LOG7[660:896]: SSL state (connect): SSLv3 write finished A 2013.06.12 12:22:46 LOG7[660:896]: SSL state (connect): SSLv3 flush data 2013.06.12 12:22:47 LOG7[660:896]: SSL state (connect): SSLv3 read finished A 2013.06.12 12:22:47 LOG7[660:896]: 2 items in the session cache 2013.06.12 12:22:47 LOG7[660:896]: 2 client connects (SSL_connect()) 2013.06.12 12:22:47 LOG7[660:896]: 2 client connects that finished 2013.06.12 12:22:47 LOG7[660:896]: 0 client renegotiations requested 2013.06.12 12:22:47 LOG7[660:896]: 0 server connects (SSL_accept()) 2013.06.12 12:22:47 LOG7[660:896]: 0 server connects that finished 2013.06.12 12:22:47 LOG7[660:896]: 0 server renegotiations requested 2013.06.12 12:22:47 LOG7[660:896]: 0 session cache hits 2013.06.12 12:22:47 LOG7[660:896]: 0 external session cache hits 2013.06.12 12:22:47 LOG7[660:896]: 0 session cache misses 2013.06.12 12:22:47 LOG7[660:896]: 0 session cache timeouts 2013.06.12 12:22:47 LOG6[660:896]: SSL connected: new session negotiated 2013.06.12 12:22:47 LOG6[660:896]: Negotiated TLSv1/SSLv3 ciphersuite: DHE-RSA-AES256-SHA (256-bit encryption) 2013.06.12 12:22:47 LOG6[660:896]: Compression: null, expansion: null 2013.06.12 12:22:50 LOG6[660:896]: Read socket closed (readsocket) 2013.06.12 12:22:50 LOG7[660:896]: Sending close_notify alert 2013.06.12 12:22:50 LOG7[660:896]: SSL alert (write): warning: close notify 2013.06.12 12:22:50 LOG6[660:896]: SSL_shutdown successfully sent close_notify alert 2013.06.12 12:22:50 LOG7[660:896]: SSL alert (read): warning: close notify 2013.06.12 12:22:50 LOG6[660:896]: SSL closed (SSL_read) 2013.06.12 12:22:50 LOG7[660:896]: Sent socket write shutdown 2013.06.12 12:22:50 LOG5[660:896]: Connection closed: 102 byte(s) sent to SSL, 544 byte(s) sent to socket 2013.06.12 12:22:50 LOG7[660:896]: Remote socket (FD=384) closed 2013.06.12 12:22:50 LOG7[660:896]: Local socket (FD=216) closed 2013.06.12 12:22:50 LOG7[660:896]: Service [Verizon-smtp] finished (0 left) Do you have any idea why I am getting: 12:22:47.397 >> 0066 500 5.7.0 Unknown AUTH error -1 (Internal authentication error).\0D\0A Thank you, Gary On 12 Jun 2013 at 20:36, Jochen (Jochen Bern <Jochen.Bern(a)LINworks.de>) commented about Re: [stunnel-users] Getting Stunnel working with : > On 12.06.2013 19:48, Gary Kuznitz wrote: > > Thanks for showing me how to test SSL. I installed openssl and ran the test. This is > > what I received back. > > > > C:\Programs\OpenSSL-Win32\bin>openssl s_client -connect smtp.verizon.net:465 > [...] > > Verify return code: 19 (self signed certificate in certificate chain) > > --- > > At this point, the SSL layer of the connection has been set up (s_client > ignores the non-null verification result) and the actual payload > protocol can start to do its thing. The payload protocol is SMTP, so the > server throws you a hello line: > > > 220 vms173025pub.verizon.net -- Server ESMTP (Sun Java(tm) System Messaging Server 7u2-7.02 32bit (built Apr 16 2009)) > > and then waits for the client to send its requests. Since you apparently > didn't enter anything, the server obviously terminated the connection with: > > > 421 4.4.2 Timeout while waiting for command. > > An actual SMTP session with an *attempt* at transferring an e-mail would > look like, e.g.: > > > 220 vms173023pub.verizon.net -- Server ESMTP (Sun Java(tm) System Messaging Server 7u2-7.02 32bit (built Apr 16 2009)) > > HELO this.is.my.laptop > > 250 vms173023pub.verizon.net OK, [unknown] [213.157.4.156]. > > MAIL FROM:<Jochen.Bern(a)LINworks.de> > > 550 5.7.1 Authentication Required > > rSET > > 250 2.5.0 Ok. > > QUIT > > (The lines starting with a three-digit SMTP status code number are sent > by the server; the 5xx code signals a permanent error; the lines > starting with a four-letter SMTP command are sent by the client, i.e., I > typed them into the s_client; and I typed "rSET" instead of the normal > "RSET" because s_client takes every line starting with an *uppercase* > 'R' as a command to do an SSL renegotiation.) > > > It sounds like something is wrong on this end. Any ideas? > > What about the two *****DIFFERING***** port numbers I pointed out in > your posted data? > > >> On 12.06.2013 05:12, Gary Kuznitz wrote: > >>> [Verizon-smtp] > >>> client = yes > >>> accept = 11015 > >> ^##^^ > >> [...] > >>> --- Tue, 11 Jun 2013 16:38:55 --- > >>> Connect to 'localhost' port 10115, timeout 60. > >> ^##^^ > > I don't actually use stunnel (subscribed to the list when I had a need > that I later fulfilled with socat, but that's Unix/Linux only), so I > don't know whether stunnel has a problem with the self-signed cert ... > > Regards, > J. Bern > -- > *NEU* - NEC IT-Infrastruktur-Produkte im <http://www.linworks-shop.de/>: > Server--Storage--Virtualisierung--Management SW--Passion for Performance > Jochen Bern, Systemingenieur --- LINworks GmbH <http://www.LINworks.de/> > Postfach 100121, 64201 Darmstadt | Robert-Koch-Str. 9, 64331 Weiterstadt > PGP (1024D/4096g) FP = D18B 41B1 16C0 11BA 7F8C DCF7 E1D5 FAF4 444E 1C27 > Tel. +49 6151 9067-231, Zentr. -0, Fax -299 - Amtsg. Darmstadt HRB 85202 > Unternehmenssitz Weiterstadt, Geschäftsführer Metin Dogan, Oliver Michel

1 0

Getting Stunnel working with Verizon.net SMTP
by Gary Kuznitz 12 Jun '13

12 Jun '13

I can't seem to connect with email at Verizon.net SMTP. I can connect with POP3. The Stunnel.log shows: 2013.06.11 19:27:04 LOG5[3752:2524]: stunnel 4.56 on x86-pc-msvc-1500 platform 2013.06.11 19:27:04 LOG5[3752:2524]: Compiled/running with OpenSSL 1.0.1e-fips 11 Feb 2013 2013.06.11 19:27:04 LOG5[3752:2524]: Threading:WIN32 Sockets:SELECT,IPv6 SSL:ENGINE,OCSP,FIPS 2013.06.11 19:27:04 LOG5[3752:2524]: Reading configuration from file stunnel.conf 2013.06.11 19:27:04 LOG5[3752:2524]: FIPS mode is enabled 2013.06.11 19:27:04 LOG5[3752:2524]: Configuration successful I have IPv6 turned off in my network settings. The Stunnel.conf looks like this: output = stunnel.log cert = stunnel.pem options = NO_SSLv2 [Verizon-pop3] client = yes accept = 11014 connect = pop.verizon.net:995 delay = yes [Verizon-smtp] client = yes accept = 11015 connect = smtp.verizon.net:465 delay = yes I do not have SSL turned on in my email client. The log from my email client looks like this: --- Tue, 11 Jun 2013 16:38:55 --- Connect to 'localhost' port 10115, timeout 60. 16:38:56.897 15: Peer connect failure (the host has refused the connection). The Verizon account is FIOS. I am not connected directly to the Verizon ISP. I can't send email without SSL. Does anyone have any idea how I can get this working? Thanks, Gary Kuznitz

3 4

Certificate failure to verify with verify = 4 option
by Thomas Eifert 10 Jun '13

10 Jun '13

Correction: The cert issuer is Startcom Ltd, not Startcom LLC. -- Greetings; Stunnel 4.56 running under Win 7 SP1 x86. Recently, the owners of a server I regularly connect to updated their server certificate; the former had expired at the end of May. As soon as that event occurred, I deleted the old certificate, then used the "save peer certificate" function of Stunnel to get the updated one. However, the new certificate fails to verify, even with the verify = 4 option in Stunnel. The error message is similar to what I used to get when doing a verify = 3 with some certificates. The general error output of Stunnel is: CERT: Verification error: unable to get local issuer certificate 2013.06.09 16:37:46 LOG4[608:2336]: Certificate check failed: depth=0 When I open the new certificate with: openssl x509 -text -in certname.pem and view the certificate details, I'm not seeing anything obvious. The certificate is within a valid date range, and contains the same basic elements as other certs I've viewed. The certificate appears to have been issued by Startcom LLC. If I comment out the verify statement, I'm able to successfully negotiate an SSL connection with the server. I realize that this may be more of an openssl issue than an issue with Stunnel. Nevertheless, I thought I'd start here and throw it out to the floor for comments. Anyone have any ideas or have run into this issue? Regards, Thomas -- Attention: This message and all attachments are private and may contain information that is confidential and privileged. If you received this message in error, please notify the sender by reply email and delete the message immediately. _______________________________________________ stunnel-users mailing list stunnel-users(a)stunnel.org https://www.stunnel.org/cgi-bin/mailman/listinfo/stunnel-users

3 3

weird stunnel problem
by Stephen Griffin 03 Jun '13

03 Jun '13

Hello A few days ago we ran into issue where the number of stunnel threads sky rocketed to over 3000 open stunnel threads. When this happen connections to our website slowed down considerably or failed to connect. It was resolved by flipping to our other proxy which accepted any new connections. It took about 5 minutes for the threads to die off on the other proxy. I was wondering if anyone has come across this problem? Here are some details of our stunnel version and config. Stunnel 4.44 with patch for x-forwarder [root@brm-proxy01 ~]# stunnel -version stunnel 4.44 on x86_64-unknown-linux-gnu platform Compiled/running with OpenSSL 1.0.0-fips 29 Mar 2010 Threading:PTHREAD SSL:ENGINE Auth:LIBWRAP Sockets:POLL,IPv6 Global options: debug = daemon.notice pid = /var/run/stunnel.pid RNDbytes = 64 RNDfile = /dev/urandom RNDoverwrite = yes Service-level options: ciphers = ALL:!SSLv2:!aNULL:!EXP:!LOW:-MEDIUM:RC4:+HIGH curve = prime256v1 session = 300 seconds sslVersion = TLSv1 for client, all for server stack = 65536 bytes TIMEOUTbusy = 300 seconds TIMEOUTclose = 60 seconds TIMEOUTconnect = 10 seconds TIMEOUTidle = 43200 seconds verify = none appriacated Our stunnel.conf. /etc/stunnel/stunnel.conf #sslVersion = TLSv1 pid = /var/run/stunnel.pid syslog = yes output = /var/log/stunnel.log debug = 3 [https] cert = /etc/stunnel/ssl/wildcard.blah.com.pem accept = 443 connect = 80 xforwardedfor = yes TIMEOUTbusy = 300 TIMEOUTclose = 0 TIMEOUTconnect = 10 TIMEOUTidle = 60 Is there anything we could add for performance tuning in stunnel? Any suggestions on what I could look for when this happens again would be appreciated. Our platform does between 2000 to 3000 rpm (request per minute) during peak hours. We constantly see a lot of these messages every hour but I am not sure what is happening as the connections seem to be working. SSL_accept: Peer suddenly disconnected There was a higher spike of them as per the normal rate during our incident described above. Thanks Stephen Griffin Sr. System Administrator www.achievers.com<http://www.achievers.com/> Confidentiality: The information contained in this e-mail and any attachments are confidential. If you are not the intended recipient, you may not copy or distribute this information. If you have received this communication in error, please notify the sender immediately and delete it from your system.

1 0

x-forwarded-for.patch for stunnel 4.55/4.56
by Shannon Carver 17 May '13

17 May '13

Hi all, Just wondering if anyone know's a an xforwardedfor patch available for the latest versions of stunnel? Thanks Shannon Carver

2 1

Strange Stunnel crash (no errors, issues, anything)
by Alfred Kernaghan 17 May '13

17 May '13

Hi, Long time lurker, new poster though! I've got two servers running Stunnel v2.54 (yet to upgrade as I've been waiting for an x-forwardfor patch to become available). I noticed recently that one Stunnel nodes had exited, requiring a restart. I'm not sure if it's a co-incidence, but I've only just changed the cert on both installs last night. This, of course, is very concerning as it's only just become a problem, but being the core SSL endpoint, it knocks our server offline until it's restarted. Now comes the interesting bit, I've run the SSL Labs SSL Health check at https://www.ssllabs.com/ssltest/ just to see if anything comes out of it, and noticed that without fail every time it runs (and the first server is online) it'll know Stunnel offline as it goes through it's tests: *"Testing TLS v1.0...." "Testing TLS v1.2...."* *-- SERVER OFFLINE --* This was noticed by a fluke, but appears to happen every time I restart and then rerun the test. I'm not getting any segfaults, or errors from stunnel, and it only affects the one (primary) server. Can anyone shed any light as to what might be causing it, how I can get any more info out of stunnel, or better yet, fix it completely? Thanks all Alfie

2 2

Error with stunnel 4.56 on Ubuntu 12
by Laura Fried 12 May '13

12 May '13

I am getting a success with doing the configure, make and make install. However when I go to start up stunnel I get the following error message: Clients allowed=500 stunnel 4.56 on x86_64-unknown-linux-gnu platform Compiled/running with OpenSSL 1.0.1 14 Mar 2012 Threading:PTHREAD Sockets:POLL,IPv6 SSL:ENGINE,OCSP,FIPS Reading configuration from file /usr/local/etc/stunnel/stunnel.conf FIPS_mode_set: F06D065: error:0F06D065:common libcrypto routines:FIPS_mode_set:fips mode not supported Line 51: "[pop3s]": Failed to initialize SSL str_stats: 9 block(s), 163 data byte(s), 522 control byte(s) Any assistance would be greatly appreciated. -- Laura J. Fried

1 0

4.53 32-bit on Windows 2k8 R2 64bit
by Michael Curran 01 May '13

01 May '13

We are running stunnel and noticed an issue with what ended up being an issue creating a new thread due to running out of memory at 2gb - error (8) on create_client Are there any known issues with 4.53 around memory usage? We only terminate 2 ports against the installation 443 on 2 different interfaces / IP addresses and we ran into this issue with just under 5000 total connections We are not doing ECDH , but are using a 1024-bit param file

2 3

Problem with roundrobbin failover mode?
by Matt Wise 01 May '13

01 May '13

I've got dozens of clients connecting with Stunnel to a group of 5 servers. Each system has a config that looks like this: > cert = /etc/stunnel/zookeeper.pem > key = /etc/stunnel/zookeeper.key > CAfile = /etc/stunnel/zookeeper_ca.pem > verify = 2 > delay = yes > sslVersion = TLSv1 > client = yes > setuid = stunnel4 > setgid = stunnel4 > pid = /var/lib/stunnel4/zookeeper.stunnel4.pid > socket = l:TCP_NODELAY=1 > socket = r:TCP_NODELAY=1 > TIMEOUTconnect = 2 > session = 86400 > debug = 5 > [zookeeper] > accept = 127.0.0.1:2182 > failover = rr > connect = prod-zookeeper:2182 > connect = prod-zookeeper-1:2182 > connect = prod-zookeeper-2:2182 > connect = prod-zookeeper-3:2182 > connect = prod-zookeeper-4:2182 > connect = prod-zookeeper-5:2182 Essentially the first host is a load balancer, and the next 5 are the actual zookeeper hosts so that we can bypass the ELB if its giving us fits. Now what we're seeing is that almost every connection ends up on prod-zookeeper-5. Over and over and over again, our hosts pick the same system each time. We're running Stunnel 4.52: > Clients allowed=8000 > stunnel 4.52 on i486-pc-linux-gnu platform > Compiled/running with OpenSSL 0.9.8k 25 Mar 2009 > Threading:PTHREAD SSL:ENGINE Auth:LIBWRAP Sockets:POLL,IPv6 Any ideas what might be wrong here? Obviously we want the connections to be *roughly* random across the list of hosts... and if one of the hosts goes down, and the connection fails, we want the stunnel service to try again, and randomly pick a new host. It doesn't really seem to be doing that though. --Matt

3 8

help on Linux stunnel setup
by Valerio.FABRIZIO＠sungard.com 26 Apr '13

26 Apr '13

Hello all! I'm in charge of activating stunnel to connect a service to a remote service. Since I'm totally new on this product, I'd be grateful if someone could help me in configuring. This is where I stand: Stunnel version: stunnel 4.29 on x86_64-unknown-linux-gnu with OpenSSL 1.0.0-fips 29 Mar 2010 OS: Linux 2.6.32-220.23.1.el6.x86_64 #1 SMP Mon Jun 18 18:58:52 BST 2012 x86_64 x86_64 x86_64 GNU/Linux I'd need to have it started by non-root user, and I have loaded under a specific path (owned by the same user): Stunnel.conf: ; Sample stunnel configuration file ;cert = FXMS1.pem client = yes output = /export/home/bg_mtsbv/slev5fix/log pid = /export/home/bg_mtsbv/slev5fix/conf/stunnel.pid [ssl01] accept = 127.0.0.1:18889 connect = 193.203.229.143:443 Stunnel.pid (empty) xxx.pem (certificate has been provided by the owner of the target server) my first two questions: which is the correct command line to be launched? Is it correct to have all the files under the user's directory? Many thanks in advance for your help! Regards, Valerio

1 0

Inconsistent performance across stunnel and/or OpenSSL versions
by PPingPongBaker PPingPongBaker 23 Apr '13

23 Apr '13

Hi All, I am experimenting with stunnel inside a VM on Xenserver 6.02. So this may not be a "common" use case, nonetheless, I would like to point out the issue. It is a basic setup as follows with 3 VMs running "ab" for webclient, stunnel+haproxy combo as the https/http bridge and nginx as the webserver. client VM (ab) <-> stunnel + haproxy VM <-> webserver VM (nginx) Specs on the stunnel VM are 2GB RAM, single-core dedicated 2.5 GHz Xeon E5-2640 vCPU, running Debian Squeeze 2.6.32-5-amd64 (64 bit) kernel. All things unchanged such as stunnel/haproxy/nginx config and taking care of common gotchas such as file descriptor limit, TIMEOUTclose, disabling libwrap, etc. stunnel is built with pthreads. Also stunnel is configured to use a 2K RSA self-signed certificate, and the client is being forced to do TLS1. "ab" is invoked with "-c 4" so as to peg the stunnel VM CPU (any value beyond 4 doesn't seem to matter). nginx serves a tiny 32 byte static html file. With stunnel 4.29 and OpenSSL 0.9.8o, I get 300 requests per second as max throughput. With stunnel 4.56 and OpenSSL 1.0.1e, I get only 40 requests per second as max throughput. tcpdump tells me that the Server Hello sent to the client takes a longer time in the latter case. Tinkering with TCP_NODELAY doesn't change anything. Anyone else seeing this maybe even on physical hardware? Has anything changed in OpenSSL across those versions? Suggestions? Thanks.

4 10

Windows Failover Clustering Support
by Cynthia Haselton 22 Apr '13

22 Apr '13

All, A (hopefully) quick question: Is stunnel supported on Windows Failover Clusters...specifically as a clustered service or to encrypt connections to/from a clustered IP? Thanks in advance, CJH

2 4

Customizing encryption
by John 19 Apr '13

19 Apr '13

HI guys, I need to take off SSL and use another encryption, need some hints since i'm new to stunnel. Thanks in advance,John

1 0

limited number of ports
by Terren Suydam 09 Apr '13

09 Apr '13

Hi, There appears to be a limit to the number of services you can define. Services beyond the 64th service appear to get set up without any log warnings or errors, yet don't pass traffic. The code uses select() & FD_SET to accept() an incoming connection & in Windows (using Windows Server 2008) the default is 64 sockets for that so wondering if I can just recompile, setting FD_SETSIZE to something larger. I'll try it either way, just wanted to put it out there to see if anyone else has ever run into this. Thanks, Terren

4 10

Trying to Upgrade stunnel, but compile isn't working?
by Michael D. Setzer II 03 Apr '13

03 Apr '13

I have been using stunnel for a long time, but was just trying to compile the latest version from source, and it compiles, but doesn't work like the older version, so I must have some option wrong. With the current version on my Fedora 14 machine using the latest version it loads the stunnel ports and works, but the newer version does seem to load or give an error message. I've tested the stunnel from Fedora 16 and Fedora 17, and they work fine with the stunnel.conf to load the settings. Current version info from Fedora 14 system. stunnel 4.34 on x86_64-redhat-linux-gnu with OpenSSL 1.0.0e-fips 6 Sep 2011 Threading:PTHREAD SSL:ENGINE Sockets:POLL,IPv6 Auth:LIBWRAP Global options debug = daemon.notice pid = /var/run/stunnel.pid RNDbytes = 64 RNDfile = /dev/urandom RNDoverwrite = yes Service-level options cert = /etc/stunnel/stunnel.pem ciphers = ALL:!aNULL:!eNULL:!SSLv2 curve = sect163r2 session = 300 seconds stack = 65536 bytes sslVersion = SSLv3 for client, all for server TIMEOUTbusy = 300 seconds TIMEOUTclose = 60 seconds TIMEOUTconnect = 10 seconds TIMEOUTidle = 43200 seconds verify = none The new build does this. stunnel 4.56 on x86_64-unknown-linux-gnu platform Compiled/running with OpenSSL 1.0.0e-fips 6 Sep 2011 Threading:PTHREAD Sockets:POLL,IPv6 SSL:ENGINE,OCSP,FIPS Global options: debug = daemon.notice pid = /usr/local/var/run/stunnel/stunnel.pid RNDbytes = 64 RNDfile = /dev/urandom RNDoverwrite = yes Service-level options: ciphers = FIPS (with "fips = yes") ciphers = ALL:!SSLv2:!aNULL:!EXP:!LOW:-MEDIUM:RC4:+HIGH (with "fips = no") sessionCacheSize = 1000 sessionCacheTimeout = 300 seconds sslVersion = TLSv1 (with "fips = yes") sslVersion = TLSv1 for client, all for server (with "fips = no") stack = 65536 bytes TIMEOUTbusy = 300 seconds TIMEOUTclose = 60 seconds TIMEOUTconnect = 10 seconds TIMEOUTidle = 43200 seconds verify = none Have also tried it with --disable-fips With the new version I have to provide the /etc/stunnel/stunnel.conf, but it doesn't load any of the options. Sure it is just a simple configure setting I am missing. Thanks. +----------------------------------------------------------+ Michael D. Setzer II - Computer Science Instructor Guam Community College Computer Center mailto:mikes@kuentos.guam.net mailto:msetzerii@gmail.com http://www.guam.net/home/mikes Guam - Where America's Day Begins G4L Disk Imaging Project maintainer http://sourceforge.net/projects/g4l/ +----------------------------------------------------------+ http://setiathome.berkeley.edu (Original) Number of Seti Units Returned: 19,471 Processing time: 32 years, 290 days, 12 hours, 58 minutes (Total Hours: 287,489) BOINC@HOME CREDITS SETI 14305761.074364 | EINSTEIN 10610832.119852 ROSETTA 6726167.419674 | ABC 15903532.519753

2 2

Log Rotation on Windows
by Brian Wilkins 03 Apr '13

03 Apr '13

I know that log rotation on Windows is on the TO-DO list. Is there a way to rotate the log at startup using some other means or during use? I suppose I could start stunnel with a batch file and do the log rotation before starting. Is there any other way? Brian

1 0

32/64 bit interposition on Solaris
by Norm Jacobs 29 Mar '13

29 Mar '13

I was recently working with stunnel on Solaris and ran across the following code in client.c: putenv("LD_PRELOAD=" LIBDIR "/libstunnel.so"); This appears to have been put in place to interpose a stunnel version of getpeername() on the downstream application. This works great when libstunnel.so has the same bittedness as the downstream application, but Solaris allows users to install and run both 32 and 64 bit applications on the same system. If the stunnel exectuable is a 32 bit application and the downstream application is a 64 bit application, the runtime linker falls over because of the mismatch with the interposed library. To avoid this problem, stunnel should use LD_PRELOAD_32 and LD_PRELOAD_64 on Solaris. I have put together a patch to client.c that sets both LD_PRELOAD_* environment variables to something that seems to make sense on Solaris, but have used a fairly hacky way of enabling it when I build. The client.c changes that I put together are: # On Solaris, fix stunnel so that the linker know where both the 32 and 64 bit # interposer libraries are. If you use LD_PRELOAD with the wrong bittedness # of interposer, the runtime linker hits a fatal error in trying to load # mismatched ELF objects. # diff -r -u stunnel-4.55.orig/src/client.c stunnel-4.55/src/client.c --- stunnel-4.55.orig/src/client.c 2013-02-28 00:17:58.000000000 -0800 +++ stunnel-4.55/src/client.c 2013-03-21 22:55:21.098479331 -0700 @@ -1096,9 +1096,14 @@ /* just don't set these variables if getnameinfo() fails */ putenv(str_printf("REMOTE_HOST=%s", host)); if(c->opt->option.transparent_src) { - putenv("LD_PRELOAD=" LIBDIR "/libstunnel.so"); - /* for Tru64 _RLD_LIST is used instead */ +#ifdef MACH64 + putenv("LD_PRELOAD_32=" LIBDIR "/libstunnel.so"); + putenv("LD_PRELOAD_64=" LIBDIR "/" MACH64 "/libstunnel.so"); +#elif __osf /* for Tru64 _RLD_LIST is used instead */ putenv("_RLD_LIST=" LIBDIR "/libstunnel.so:DEFAULT"); +#else + putenv("LD_PRELOAD=" LIBDIR "/libstunnel.so"); +#endif } } This adds more appropriate environment variables into the calling environment on Solaris. It still needs some work to integrate better with the build. Anyway, I thought that I would raise the issue and at least offer a direction to work from. I am happy to work with someone on a better resolution to this. -Norm

1 0

use of CRYPTO_NUM_LOCKS
by Norm Jacobs 29 Mar '13

29 Mar '13

A while ago, the Solaris security group noticed that stunnel uses CRYPTO_NUM_LOCKS to size a lock table in the code at compile time. They noted that there is function CRYPTO_num_locks() that can do the same thing at runtime and have requested that the function be used so that FIPS/non-FIPS support can be switched on by users simply using interposition. As a result of this, I put together this patch that switches to code to use the function instead of macro. -Norm # stunnel should use CRYPTO_num_locks() function instead of CRYPTO_NUM_LOCKS # macro. The function interogates libcrypto at run-time for sizing and the # macro at compile time. If you interpose a a version at runtime to switch # between FIPS/non-FIPS support, the lock table may not be sized correctly. # diff -r -u stunnel-4.55.orig/src/sthreads.c stunnel-4.55/src/sthreads.c --- stunnel-4.55.orig/src/sthreads.c 2012-08-09 14:44:18.000000000 -0700 +++ stunnel-4.55/src/sthreads.c 2013-03-21 23:29:34.912001586 -0700 @@ -212,7 +212,7 @@ #ifdef USE_PTHREAD static pthread_mutex_t stunnel_cs[CRIT_SECTIONS]; -static pthread_mutex_t lock_cs[CRYPTO_NUM_LOCKS]; +static pthread_mutex_t *lock_cs; void enter_critical_section(SECTION_CODE i) { pthread_mutex_lock(stunnel_cs+i); @@ -275,13 +275,15 @@ int sthreads_init(void) { int i; + int num_locks = CRYPTO_num_locks(); /* initialize stunnel critical sections */ for(i=0; i<CRIT_SECTIONS; i++) pthread_mutex_init(stunnel_cs+i, NULL); /* initialize OpenSSL locking callback */ - for(i=0; i<CRYPTO_NUM_LOCKS; i++) + lock_cs = calloc(num_locks, sizeof (*lock_cs)); + for(i=0; i<num_locks; i++) pthread_mutex_init(lock_cs+i, NULL); CRYPTO_set_id_callback(stunnel_thread_id); CRYPTO_set_locking_callback(locking_callback);

1 0

SSL VPN configuration confusion
by TJ 28 Mar '13

28 Mar '13

I'm using stunnel v4.56 on Linux (Ubuntu) and trying to configure a routed tunnel in conjunction with pppd. I could do with some help to figure it out - my biggest problem is not knowing what a good connection configuration or log looks like. I've read lots of (old) patchy articles on how it is done but the instructions are either hopelessly out of date, or plain wrong. During extensive trial and error I found what appeared to be bugs in the Ubuntu distro-packaged v4.42 but as I don't yet know what a successful connection log looks like they may have been red herrings. The main issue I was trying to build out of was (on the server): SSL accepted: new session negotiated Negotiated ciphers: ECDHE-RSA-RC4-SHA SSLv3 Kx=ECDH Au=RSA Enc=RC4(128) Mac=SHA1 TTY=/dev/pts/4 allocated Local mode child started (PID=17247) Remote FD=1 initialized TCP_NODELAY: Socket operation on non-socket (88) Connection reset: 0 bytes sent to SSL, 0 bytes sent to socket linger (remote): Socket operation on non-socket (88) Service vpn finished (0 left) At this point there would be no pppX interfaces. I created an up-to-date Debian/Ubuntu package for v4.56 which has been more successful. Both ends of the link have the same x86 (i386) package installed. On the server again: stunnel: LOG6[23986:3073268544]: SSL accepted: new session negotiated stunnel: LOG6[23986:3073268544]: Negotiated TLSv1/SSLv3 ciphersuite: ECDHE-RSA-RC4-SHA (128-bit encryption) stunnel: LOG6[23986:3073268544]: Compression: null, expansion: null stunnel: LOG7[23986:3073268544]: TTY=/dev/pts/5 allocated stunnel: LOG6[23986:3073268544]: Local mode child started (PID=23989) stunnel: LOG7[23986:3073268544]: Remote socket (FD=14) initialized stunnel: LOG3[23986:3073268544]: TCP_NODELAY: Socket operation on non-socket (88) stunnel: LOG4[23986:3073268544]: Failed to set remote socket options pppd[23989]: pppd options in effect: pppd[23989]: debug^I^I# (from /etc/ppp/peers/pella-vpn) pppd[23989]: updetach^I^I# (from /etc/ppp/peers/pella-vpn) pppd[23989]: linkname pella^I^I# (from /etc/ppp/peers/pella-vpn) pppd[23989]: ktune^I^I# (from /etc/ppp/peers/pella-vpn) pppd[23989]: unit 3^I^I# (from /etc/ppp/peers/pella-vpn) pppd[23989]: dump^I^I# (from /etc/ppp/peers/pella-vpn) pppd[23989]: nomp^I^I# (from /etc/ppp/peers/pella-vpn) pppd[23989]: noauth^I^I# (from /etc/ppp/peers/pella-vpn) pppd[23989]: ^I^I# (from /etc/ppp/options) pppd[23989]: notty^I^I# (from /etc/ppp/peers/pella-vpn) pppd[23989]: crtscts^I^I# (from /etc/ppp/options) pppd[23989]: local^I^I# (from /etc/ppp/peers/pella-vpn) pppd[23989]: noaccomp^I^I# (from /etc/ppp/peers/pella-vpn) pppd[23989]: asyncmap 0^I^I# (from /etc/ppp/options) pppd[23989]: nopcomp^I^I# (from /etc/ppp/peers/pella-vpn) pppd[23989]: silent^I^I# (from /etc/ppp/peers/pella-vpn) pppd[23989]: lcp-echo-failure 4^I^I# (from /etc/ppp/options) pppd[23989]: lcp-echo-interval 30^I^I# (from /etc/ppp/options) pppd[23989]: hide-password^I^I# (from /etc/ppp/options) pppd[23989]: novj^I^I# (from /etc/ppp/peers/pella-vpn) pppd[23989]: noipdefault^I^I# (from /etc/ppp/peers/pella-vpn) pppd[23989]: noccp^I^I# (from /etc/ppp/peers/pella-vpn) pppd[23989]: noipx^I^I# (from /etc/ppp/options) pppd[23989]: pppd 2.4.5 started by root, uid 0 pppd[23989]: using channel 19 udevd[2122]: device 0xb7b0a6e8 has devpath '/devices/virtual/net/ppp3' udevd[2122]: created empty file '/run/udev/data/n27' for '/devices/virtual/net/ppp3' pppd[23989]: Using interface ppp3 pppd[23989]: Connect: ppp3 <--> /dev/pts/6 Both ends of the link have ppp interfaces but neither have IP addresses. The server configuration is: ----- /etc/stunnel/pella-vpn.conf ----- CAfile = /etc/stunnel/vpn.pem cert = /etc/stunnel/vpn.pem key = /etc/stunnel/vpn.pem output = /var/log/stunnel-vpn.log #verify = 2 debug = 7 client = no foreground = no [vpn] accept = 109.74.x.y:9876 exec = /usr/sbin/pppd execargs = pppd call pella-vpn 10.254.241.1:10.254.241.2 pty = yes ---------- ----- /etc/ppp/peers/pella-vpn ----- unit 3 notty ktune local noipdefault noccp noauth novj nomp nopcomp noaccomp silent updetach linkname pella debug dump ---------- # ifconfig ppp3 ppp3 Link encap:Point-to-Point Protocol POINTOPOINT NOARP MULTICAST MTU:1500 Metric:1 RX packets:0 errors:0 dropped:0 overruns:0 frame:0 TX packets:0 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:3 RX bytes:0 (0.0 B) TX bytes:0 (0.0 B) The client configuration is: ---- /etc/network/interfaces ----- # SSL VPN to Pella iface ppp3 inet ppp unit 3 provider pella-vpn pre-up /sbin/ifconfig ppp0 up ---------- ----- /etc/ppp/peers/pella-vpn ----- # ensure we use ppp3 (ppp0-2 are already in use) unit 3 ktune local noipdefault noccp noauth novj nomp nopcomp noaccomp silent updetach logfd 2 linkname pella pty "/usr/bin/stunnel4 /etc/stunnel/pella.conf.vpn" user "tj" # debugging debug dump ---------- ----- /etc/stunnel/pella.conf.vpn ----- pid = /var/run/stunnel4/pella.pid debug = debug output = /var/log/stunnel-pella.log foreground = no client=yes connect = 109.74.x.y:9876 CAfile = /etc/stunnel/vpn.pem # verify the peer's certificate verify = 2 ---------- # ifup ppp3 pppd options in effect: debug # (from /etc/ppp/peers/pella-vpn) updetach # (from command line) logfd 2 # (from /etc/ppp/peers/pella-vpn) linkname pella # (from /etc/ppp/peers/pella-vpn) ktune # (from /etc/ppp/peers/pella-vpn) unit 3 # (from command line) dump # (from /etc/ppp/peers/pella-vpn) nomp # (from /etc/ppp/peers/pella-vpn) noauth # (from /etc/ppp/peers/pella-vpn) user tj # (from /etc/ppp/peers/pella-vpn) # (from /etc/ppp/options) pty /usr/bin/stunnel4 /etc/stunnel/pella.conf.vpn # (from /etc/ppp/peers/pella-vpn) crtscts # (from /etc/ppp/options) local # (from /etc/ppp/peers/pella-vpn) noaccomp # (from /etc/ppp/peers/pella-vpn) asyncmap 0 # (from /etc/ppp/options) nopcomp # (from /etc/ppp/peers/pella-vpn) silent # (from /etc/ppp/peers/pella-vpn) lcp-echo-failure 4 # (from /etc/ppp/options) lcp-echo-interval 30 # (from /etc/ppp/options) hide-password # (from /etc/ppp/options) novj # (from /etc/ppp/peers/pella-vpn) noipdefault # (from /etc/ppp/peers/pella-vpn) noccp # (from /etc/ppp/peers/pella-vpn) noipx # (from /etc/ppp/options) using channel 43 Using interface ppp3 Connect: ppp3 <--> /dev/pts/5 # ifconfig ppp3 ppp3 Link encap:Point-to-Point Protocol POINTOPOINT NOARP MULTICAST MTU:1500 Metric:1 RX packets:0 errors:0 dropped:0 overruns:0 frame:0 TX packets:0 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:3 RX bytes:0 (0.0 B) TX bytes:0 (0.0 B) # netstat -natp | grep stun tcp 0 0 82.71.a.b:34437 109.74.x.y:9876 ESTABLISHED 24105/stunnel4

1 2

Fw: High memory usage problem.
by mkanet＠yahoo.com 27 Mar '13

27 Mar '13

Jeremy, I know there's an android build of stunnel. Im not trying to be funny, but are you running stunnel on your mobile phone? :) The latest android mobile phones include quadcore CPU's with 2GB's of RAM It would be interesting to see how much of a load a mobile phone can handle with a USB to RJ45 Ethernet interface. Edit: I tried sending this earlier, but it doesn't look like it went through. My apologies in case this is a duplicate. ------------------------ Thanks for taking the time to read this. We're operating on a low spec system that can not be modified at this point. stunnel was introduced at the last minute, without consideration to resource requirements and now consumes enough ram to cause the kernel to issue OOM exceptions. So in short, we are trying to trade increased CPU usage for less memory usage and have tried setting “sessions” to 3600 to reduce memory pressure, but unfortunately it doesn't last. Our current solution is to cron a restart of stunnel on a regular basis, but would prefer to limit number of threads or number of cache entries or something else altogether similarly gentler. Thanks again for your consideration and assistance in this! If there's any specific information I can give, please let me know. Regards, Jeremy

3 7

environment/user variable
by Sebastian Rose-Indorf 26 Mar '13

26 Mar '13

Hello, Stunnel is a very helpful tool. But I miss the support of a environment/user variable to reference the configuration file or the folder of the configuration file: such as %GNUPGHOME% in GnuPG or %OPENSSL_CONF% in OpenSSL. Sebastian

1 0

the range of stunnel functionality
by John A. Wallace 26 Mar '13

26 Mar '13

Where can I find more information about the use and functionality of "tstunnel.exe"? Maybe I am going quite blind, but I looked around unsuccessfully. Thanks. John A. Wallace The pen is mightier than the sword, but only if you get in the first stroke.

3 3

stunnel 4.56 released
by Michal Trojnara 23 Mar '13

23 Mar '13

Dear Users, I have released version 4.56 of stunnel. The ChangeLog entry: Version 4.56, 2013.03.22, urgency: HIGH: * New features - Win32 installer automatically configures firewall exceptions. - Win32 installer configures administrative shortcuts to invoke UAC. - Improved Win32 GUI shutdown time. * Bugfixes - Fixed a regression bug introduced in version 4.55 causing random crashes on several platforms, including Windows 7. - Fixed startup crashes on some Win32 systems. - Fixed incorrect "stunnel -exit" process synchronisation. - Fixed FIPS detection with new versions of the OpenSSL library. - Failure to open the log file at startup is no longer ignored. Home page: https://www.stunnel.org/ Download: https://www.stunnel.org/downloads.html SHA-256 hash for stunnel-4.56.tar.gz: 9cae2cfbe26d87443398ce50d7d5db54e5ea363889d5d2ec8d2778a01c871293 Best regards, Mike

2 2

4.56 FIPS startup issue
by Ian Donaldson 23 Mar '13

23 Mar '13

Hi, I've been using stunnel for years and tried to upgrade to 4.56 today and it fails to start with this error: Clients allowed=125 stunnel 4.56 on i386-pc-solaris2.9 platform Compiled/running with OpenSSL 1.0.1e 11 Feb 2013 Threading:PTHREAD Sockets:POLL,IPv6 SSL:ENGINE,OCSP,FIPS Reading configuration from file /opt/local/etc/stunnel.conf FIPS_mode_set: F06D065: error:0F06D065:common libcrypto routines:FIPS_mode_set:fips mode not supported Line 36: "[pop3s]": Failed to initialize SSL str_stats: 5 block(s), 118 data byte(s), 210 control byte(s) I note some mention of FIPS in today's release. 4.55 started ok though with the same version of openssl (and crashed a few hours later), so we're back to 4.54 again. Ian D

1 1

stunnel craches in windows 7 x64
by Mosy Mosy 15 Mar '13

15 Mar '13

I have been facing with a strange bug in stunnel 4.55 (and also in tstunnel) in Windows 7 x64 and also in Windows Server 2003 R2 x86. I redirect TCP connections from a win7 client to a win2k3 server. Stunnel works fine when accepting connections and transferring data. But suddenly crashes when the client program (in the client side) closes the connection (maybe the several connections simultaneously). It happens on the server side too. Because of this problem I have to load a little program to relaunch stunnel whenever it is crashed. What I mean by 'crash' is that the windows shows the "stunnel stops working" and giving the choices to restart,stop, or debug the program. If you need more details I will be pleased to help you in this case. Thank you :) PS: I just have downloaded "stunnel-4.56b1" and I'm using it right now. I see no sign of crashing and instability until this moment :) it seems the bug is eliminated :)

1 0

4.55 is unstable
by Death Master 14 Mar '13

14 Mar '13

Windows build of 4.55, 2013.03.03 crashes every 20-60sec under load. OS:Win7 x64 (with all updates) This bug affects both stunnel and tstunnel. Please fix it soon ;)

5 6

stunnel: SSL routinesdecryption failed or bad record mac
by Kishore Paul 13 Mar '13

13 Mar '13

Hello Everyone, I updated to the latest version of stunnel and openssl and am still getting a lot of decryption fails. stunnel: SSL routines:SSL3_GET_RECORD:decryption failed or bad record mac and a few times it just segfaults: [937987.314573] stunnel: segfault at 7f6164025000 ip 00007f616d8b5adc sp 00007f616e6a9af0 error 4 in libcrypto.so.1.0.0[7f616d84a000+19f000] stunnel 4.54 on x86_64-unknown-linux-gnu platform Compiled with OpenSSL 1.0.1e 11 Feb 2013 Running with OpenSSL 1.0.1 14 Mar 2012 Is there any way to avoid these errors? I limited my cipher set to just RC4-SHA after seeing that there is an issue even in openssl 1.01e-1 for e_aes_cbc_hmac_sha1.c http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=678353 Appreciate your help. Thanks, Kishore

1 0

Need help to configure STUNNEL using proxy socks v5 to send file to a server
by laurent.uk＠bnpparibas.com 11 Mar '13

11 Mar '13

Hi everyone, I need to connect to proxy socks V5 in order to send file in my server. I configure my stunnel like this : sslVersion = SSLv3 client=yes cert = /opt/freeware/etc/stunnel/ca_nopass.pem pid = /var/adm/stunnel_test.pid socket = l:TCP_NODELAY=1 socket = r:TCP_NODELAY=1 debug = 7 output = /logs/stunnel/stunnel.log ; Don't forget to c_rehash CApath ; CApath is located inside chroot jail CApath = /opt/freeware/etc/stunnel/CA_files/ protocol = connect protocolAuthentication = basic protocolHost = ***:8080 [pesit] accept = 12099 connect = ***:433 But it doesn't works! The log from my stunnel client : 2013.03.11 18:57:30 LOG5[26673178:260]: Service pesit accepted connection from ***:48549 2013.03.11 18:57:30 LOG7[26673178:260]: remote socket: FD=1 allocated (non-blocking mode) 2013.03.11 18:57:30 LOG6[26673178:260]: connect_blocking: connecting ::1:10443 2013.03.11 18:57:30 LOG3[26673178:260]: connect_blocking: connect ::1:10443: Connection refused (79) 2013.03.11 18:57:30 LOG7[26673178:260]: remote socket: FD=1 allocated (non-blocking mode) 2013.03.11 18:57:30 LOG6[26673178:260]: connect_blocking: connecting ****:10443 2013.03.11 18:57:30 LOG5[26673178:260]: connect_blocking: connected ****:10443 2013.03.11 18:57:30 LOG5[26673178:260]: Service pesit connected remote server from ****:48551 2013.03.11 18:57:30 LOG7[26673178:260]: Remote FD=1 initialized 2013.03.11 18:57:30 LOG7[26673178:260]: Option TCP_NODELAY set on remote socket 2013.03.11 18:57:30 LOG6[26673178:260]: Client-mode connect protocol negotiations started 2013.03.11 18:57:30 LOG7[26673178:260]: -> CONNECT ****:1080 HTTP/1.1 2013.03.11 18:57:30 LOG7[26673178:260]: -> Host: ****:1080 2013.03.11 18:57:30 LOG7[26673178:260]: -> 2013.03.11 18:57:30 LOG3[26673178:260]: fdgetline: readsocket: Connection reset by peer (73) 2013.03.11 18:57:30 LOG5[26673178:260]: Connection reset: 0 bytes sent to SSL, 0 bytes sent to socket 2013.03.11 18:57:30 LOG7[26673178:260]: Service pesit finished (0 left) 2013.03.11 18:57:30 LOG7[26673178:260]: str_stats: 0 block(s), 0 data byte(s), 0 control byte(s) 2013.03.11 18:57:32 LOG7[26673178:1]: local socket: FD=0 allocated (non-blocking mode) In my stunnel server, i have the following message : "SSL_accept: 1407609B: error:1407609B:SSL routines:SSL23_GET_CLIENT_HELLO:https proxy request" 2013.03.11 18:57:30 LOG7[27525210:1]: Service pesitip accepted FD=0 from ****:48551 2013.03.11 18:57:30 LOG7[27525210:265]: Service pesitip started 2013.03.11 18:57:30 LOG7[27525210:265]: Option TCP_NODELAY set on local socket 2013.03.11 18:57:30 LOG5[27525210:265]: Service pesitip accepted connection from 159.50.49.69:48551 2013.03.11 18:57:30 LOG3[27525210:265]: SSL_accept: 1407609B: error:1407609B:SSL routines:SSL23_GET_CLIENT_HELLO:https proxy request 2013.03.11 18:57:30 LOG5[27525210:265]: Connection reset: 0 bytes sent to SSL, 0 bytes sent to socket 2013.03.11 18:57:30 LOG7[27525210:265]: Service pesitip finished (0 left) 2013.03.11 18:57:30 LOG7[27525210:265]: str_stats: 0 block(s), 0 data byte(s), 0 control byte(s) 2013.03.11 18:57:32 LOG7[27525210:1]: local socket: FD=0 allocated (non-blocking mode) Can you help me to configure my stunnel please? Thanks. Regards, Laurent UK This message and any attachments (the "message") is intended solely for the intended addressees and is confidential. If you receive this message in error,or are not the intended recipient(s), please delete it and any copies from your systems and immediately notify the sender. Any unauthorized view, use that does not comply with its purpose, dissemination or disclosure, either whole or partial, is prohibited. Since the internet cannot guarantee the integrity of this message which may not be reliable, BNP PARIBAS (and its subsidiaries) shall not be liable for the message if modified, changed or falsified. Do not print this message unless it is necessary,consider the environment. ---------------------------------------------------------------------------------------------------------------------------------- Ce message et toutes les pieces jointes (ci-apres le "message") sont etablis a l'intention exclusive de ses destinataires et sont confidentiels. Si vous recevez ce message par erreur ou s'il ne vous est pas destine, merci de le detruire ainsi que toute copie de votre systeme et d'en avertir immediatement l'expediteur. Toute lecture non autorisee, toute utilisation de ce message qui n'est pas conforme a sa destination, toute diffusion ou toute publication, totale ou partielle, est interdite. L'Internet ne permettant pas d'assurer l'integrite de ce message electronique susceptible d'alteration, BNP Paribas (et ses filiales) decline(nt) toute responsabilite au titre de ce message dans l'hypothese ou il aurait ete modifie, deforme ou falsifie. N'imprimez ce message que si necessaire, pensez a l'environnement.

1 0

Mutual Authentication
by Sameer Rahmani 11 Mar '13

11 Mar '13

Hi guys, I want to have secure tunnel to my server and also i want only specified clients can connect via the tunnel to the server. I was reading about mutual authentication but i can't run stunnel using verify=2 or 3 or 4. I confused. Can you please explain for me what should i do to use 2way ssl connection? how does stunnel use this?

2 1

It doesn't work.
by Raemsh Pungavanam 11 Mar '13

11 Mar '13

Hi , i have following issue with latest version of stunnel and openssl. version ====== stunnel - 4.55 openssl - 1.0.1e stunnel.conf ========== # Sample stunnel configuration file # Copyright by Michal Trojnara 2002 # Comment it out on Win32 #cert = /etc/tr69/stunnel.pem key = /etc/tr69/stunnel.pem # chroot = /usr/local/var/run/stunnel/ # PID is created inside chroot jail pid = /var/run/ssl.pid setuid = root setgid = root # Protocol version (all, SSLv2, SSLv3, TLSv1) sslVersion = TLSv1.2 # Workaround for Eudora bug #options = DONT_INSERT_EMPTY_FRAGMENTS # Authentication stuff verify = 1 # don't forget about c_rehash CApath # it is located inside chroot jail: #CApath = /certs # or simply use CAfile instead: #CAfile = /usr/local/etc/stunnel/certs.pem #CAfile = /etc/tr69/ca.crt # CRL path or file (inside chroot jail): #CRLpath = /crls # or simply use CAfile instead: #CRLfile = /usr/local/etc/stunnel/crls.pem # Some debugging stuff debug = 7 output = /var/log/ssl.log foreground = yes # Use it for client mode client = yes # Service-level configuration [https] CAfile = /flash/Cert.pem accept = 127.0.0.1:8001 connect = acs.qacafe.com:80 #accept = 8080 cat /var/log/ssl.log ============== 2013.03.11 18:29:04 LOG5[5849:0]: stunnel 4.55 on mips-openwrt-linux-uclibc platform 2013.03.11 18:29:04 LOG5[5849:0]: Compiled/running with OpenSSL 1.0.1e 11 Feb 2013 2013.03.11 18:29:04 LOG5[5849:0]: Threading:FORK SSL:+ENGINE+OCSP Auth:none Sockets:POLL+IPv6 2013.03.11 18:29:04 LOG5[5849:0]: Reading configuration from file /etc/tr69/stunnel.conf 2013.03.11 18:29:04 LOG7[5849:0]: Compression not enabled 2013.03.11 18:29:04 LOG7[5849:0]: PRNG seeded successfully 2013.03.11 18:29:04 LOG6[5849:0]: Initializing service [https] 2013.03.11 18:29:04 LOG4[5849:0]: Insecure file permissions on /etc/tr69/stunnel.pem 2013.03.11 18:29:04 LOG7[5849:0]: Loaded verify certificates from /flash/Cert.pem 2013.03.11 18:29:04 LOG7[5849:0]: Loaded /flash/Cert.pem revocation lookup file 2013.03.11 18:29:04 LOG7[5849:0]: SSL options set: 0x00000004 2013.03.11 18:29:04 LOG5[5849:0]: Configuration successful 2013.03.11 18:29:04 LOG7[5849:0]: Service [https] (FD=17) bound to 127.0.0.1:8001 2013.03.11 18:29:04 LOG7[5849:0]: Created pid file /var/run/ssl.pid 2013.03.11 18:29:21 LOG7[5849:0]: Service [https] accepted (FD=4) from 127.0.0.1:36039 2013.03.11 18:29:21 LOG7[5920:0]: Service [https] started 2013.03.11 18:29:21 LOG5[5920:0]: Service [https] accepted connection from 127.0.0.1:36039 2013.03.11 18:29:22 LOG6[5920:0]: connect_blocking: connecting 6.0.0.1:80 2013.03.11 18:29:22 LOG7[5920:0]: connect_blocking: s_poll_wait 6.0.0.1:80: waiting 10 seconds 2013.03.11 18:29:22 LOG5[5920:0]: connect_blocking: connected 6.0.0.1:80 2013.03.11 18:29:22 LOG5[5920:0]: Service [https] connected remote server from 61.200.100.100:35694 2013.03.11 18:29:22 LOG7[5920:0]: Remote socket (FD=17) initialized 2013.03.11 18:29:22 LOG7[5920:0]: SNI: sending servername: acs.qacafe.com 2013.03.11 18:29:22 LOG7[5920:0]: SSL state (connect): before/connect initialization 2013.03.11 18:29:22 LOG7[5920:0]: SSL state (connect): SSLv3 write client hello A 2013.03.11 18:30:15 LOG7[5849:0]: Service [https] accepted (FD=4) from 127.0.0.1:36042 2013.03.11 18:30:15 LOG7[5973:0]: Service [https] started 2013.03.11 18:30:15 LOG5[5973:0]: Service [https] accepted connection from 127.0.0.1:36042 2013.03.11 18:30:15 LOG6[5973:0]: connect_blocking: connecting 6.0.0.1:80 2013.03.11 18:30:15 LOG7[5973:0]: connect_blocking: s_poll_wait 6.0.0.1:80: waiting 10 seconds 2013.03.11 18:30:15 LOG5[5973:0]: connect_blocking: connected 6.0.0.1:80 2013.03.11 18:30:15 LOG5[5973:0]: Service [https] connected remote server from 61.200.100.100:35697 2013.03.11 18:30:15 LOG7[5973:0]: Remote socket (FD=17) initialized 2013.03.11 18:30:15 LOG7[5973:0]: SNI: sending servername: acs.qacafe.com 2013.03.11 18:30:15 LOG7[5973:0]: SSL state (connect): before/connect initialization 2013.03.11 18:30:15 LOG7[5973:0]: SSL state (connect): SSLv3 write client hello A 2013.03.11 18:31:40 LOG7[5849:0]: Service [https] accepted (FD=4) from 127.0.0.1:49029 2013.03.11 18:31:40 LOG7[6023:0]: Service [https] started 2013.03.11 18:31:40 LOG5[6023:0]: Service [https] accepted connection from 127.0.0.1:49029 2013.03.11 18:31:40 LOG6[6023:0]: connect_blocking: connecting 6.0.0.1:80 2013.03.11 18:31:40 LOG7[6023:0]: connect_blocking: s_poll_wait 6.0.0.1:80: waiting 10 seconds 2013.03.11 18:31:40 LOG5[6023:0]: connect_blocking: connected 6.0.0.1:80 2013.03.11 18:31:40 LOG5[6023:0]: Service [https] connected remote server from 61.200.100.100:40051 2013.03.11 18:31:40 LOG7[6023:0]: Remote socket (FD=17) initialized 2013.03.11 18:31:40 LOG7[6023:0]: SNI: sending servername: acs.qacafe.com 2013.03.11 18:31:40 LOG7[6023:0]: SSL state (connect): before/connect initialization 2013.03.11 18:31:40 LOG7[6023:0]: SSL state (connect): SSLv3 write client hello A 2013.03.11 18:33:45 LOG7[5849:0]: Service [https] accepted (FD=4) from 127.0.0.1:49032 2013.03.11 18:33:45 LOG7[6074:0]: Service [https] started 2013.03.11 18:33:45 LOG5[6074:0]: Service [https] accepted connection from 127.0.0.1:49032 2013.03.11 18:33:45 LOG6[6074:0]: connect_blocking: connecting 6.0.0.1:80 2013.03.11 18:33:45 LOG7[6074:0]: connect_blocking: s_poll_wait 6.0.0.1:80: waiting 10 seconds 2013.03.11 18:33:45 LOG5[6074:0]: connect_blocking: connected 6.0.0.1:80 2013.03.11 18:33:45 LOG5[6074:0]: Service [https] connected remote server from 61.200.100.100:40054 2013.03.11 18:33:45 LOG7[6074:0]: Remote socket (FD=17) initialized 2013.03.11 18:33:45 LOG7[6074:0]: SNI: sending servername: acs.qacafe.com 2013.03.11 18:33:45 LOG7[6074:0]: SSL state (connect): before/connect initialization 2013.03.11 18:33:45 LOG7[6074:0]: SSL state (connect): SSLv3 write client hello A 2013.03.11 18:34:22 LOG6[5920:0]: init_ssl: s_poll_wait: TIMEOUTbusy exceeded: sending reset 2013.03.11 18:34:22 LOG5[5920:0]: Connection reset: 0 byte(s) sent to SSL, 0 byte(s) sent to socket 2013.03.11 18:34:22 LOG7[5920:0]: Remote socket (FD=17) closed 2013.03.11 18:34:22 LOG7[5920:0]: Local socket (FD=4) closed 2013.03.11 18:34:22 LOG7[5920:0]: Service [https] finished 2013.03.11 18:34:22 LOG7[5920:0]: str_stats: 19 block(s), 877 data byte(s), 798 control byte(s) 2013.03.11 18:34:22 LOG7[5849:0]: Dispatching signals from the signal pipe 2013.03.11 18:34:22 LOG7[5849:0]: Processing SIGCHLD 2013.03.11 18:34:22 LOG7[5849:0]: Process 5920 finished with code 0 2013.03.11 18:34:22 LOG7[5849:0]: Signal pipe is empty 2013.03.11 18:35:15 LOG6[5973:0]: init_ssl: s_poll_wait: TIMEOUTbusy exceeded: sending reset 2013.03.11 18:35:15 LOG5[5973:0]: Connection reset: 0 byte(s) sent to SSL, 0 byte(s) sent to socket 2013.03.11 18:35:15 LOG7[5973:0]: Remote socket (FD=17) closed 2013.03.11 18:35:15 LOG7[5973:0]: Local socket (FD=4) closed 2013.03.11 18:35:15 LOG7[5973:0]: Service [https] finished 2013.03.11 18:35:15 LOG7[5973:0]: str_stats: 19 block(s), 877 data byte(s), 798 control byte(s) 2013.03.11 18:35:15 LOG7[5849:0]: Dispatching signals from the signal pipe 2013.03.11 18:35:15 LOG7[5849:0]: Processing SIGCHLD 2013.03.11 18:35:15 LOG7[5849:0]: Process 5973 finished with code 0 2013.03.11 18:35:15 LOG7[5849:0]: Signal pipe is empty 2013.03.11 18:36:40 LOG6[6023:0]: init_ssl: s_poll_wait: TIMEOUTbusy exceeded: sending reset 2013.03.11 18:36:40 LOG5[6023:0]: Connection reset: 0 byte(s) sent to SSL, 0 byte(s) sent to socket 2013.03.11 18:36:40 LOG7[6023:0]: Remote socket (FD=17) closed 2013.03.11 18:36:40 LOG7[6023:0]: Local socket (FD=4) closed 2013.03.11 18:36:40 LOG7[6023:0]: Service [https] finished 2013.03.11 18:36:40 LOG7[6023:0]: str_stats: 19 block(s), 877 data byte(s), 798 control byte(s) 2013.03.11 18:36:40 LOG7[5849:0]: Dispatching signals from the signal pipe 2013.03.11 18:36:40 LOG7[5849:0]: Processing SIGCHLD 2013.03.11 18:36:40 LOG7[5849:0]: Process 6023 finished with code 0 2013.03.11 18:36:40 LOG7[5849:0]: Signal pipe is empty 2013.03.11 18:38:45 LOG6[6074:0]: init_ssl: s_poll_wait: TIMEOUTbusy exceeded: sending reset 2013.03.11 18:38:45 LOG5[6074:0]: Connection reset: 0 byte(s) sent to SSL, 0 byte(s) sent to socket 2013.03.11 18:38:45 LOG7[6074:0]: Remote socket (FD=17) closed 2013.03.11 18:38:45 LOG7[6074:0]: Local socket (FD=4) closed 2013.03.11 18:38:45 LOG7[6074:0]: Service [https] finished 2013.03.11 18:38:45 LOG7[6074:0]: str_stats: 19 block(s), 877 data byte(s), 798 control byte(s) 2013.03.11 18:38:45 LOG7[5849:0]: Dispatching signals from the signal pipe 2013.03.11 18:38:45 LOG7[5849:0]: Processing SIGCHLD 2013.03.11 18:38:45 LOG7[5849:0]: Process 6074 finished with code 0 2013.03.11 18:38:45 LOG7[5849:0]: Signal pipe is empty Normally under which circumstances this can happen. please help me totally clue less ... Rgds, Ramesh P

1 0

Stunnel SMP enabled?
by Michael Curran 06 Mar '13

06 Mar '13

I am running an Ubuntu system with Stunnel for 443 connections to an application on the back end. Essentially acting as a load balancer. When I look at the processor stats per processor (this is a 6-cpu system) I see cpu0 with almost 4% usage , compared to the other 5 processors hiting maybe .5% usage across the board. Is stunnel SMP enabled and passes processing amongst all 6 Procs? Or does it bind to one Proc and as long as its active it does all its work on just one PROC. We are having a lot of dropped connections when the overall system CPU hits about 23-25% .. which seems to me that it could be pushing just one CPU hard and the other 5 become basically idle. I am setting up to capture some SAR data to help confirm this effort, but it would if I knew that stunnel was setup for SMP processing.

1 0

Re: [stunnel-users] Stunnel as an "HTTPS to HTTPS" proxy
by Javier 05 Mar '13

05 Mar '13

On Tue, 05 Mar 2013 09:04:41 +0200 "jmwb(a)webmail.co.za" <jmwb(a)webmail.co.za> wrote: > Thank you for your response Javier. > > I now understand how to phrase what I am looking for. What I am looking for is > effectively an SSL Man-in-The-Middle (but please be assured that I am not > looking to build malware). However, I am still not certain from your response > that Stunnel can do this. Can the client-side handle SSL or does it only > support clear-text on the client side? > > jmwb Hi, in the example I gave to you is like this. Hope this can help you to understand how stunnel works in such scenario. 1. Web browser without SSL support. 2. It sends clear text to the IP:port where stunnel client is listening. 3. Stunnel in the client machine send ciphered text to the machine with Stunnel acting as server. 4. Stunnel in the server machine sends clear text to the web server. 5. The web server hasn't SSL support. 6. The communication is reversed to reply to the client side. With a diagram. Browser <> clear text <> stunnel<> ciphered <> stunnel <> clear text <> web server Of course, it is possible to make a MiTM attack between browser and stunnel and stunnel and web server at both sides, but not in between. To accomplish such attack you'll first need to access one of the machines and find such scenario. If both sides support SSL you don't need stunnel (unless one of the sides doesn't support SSL) and, therefore, all communications are ciphered P2P. No clear text. Except keyboard/mouse loggers in the client side. As said, is a secure tunnel, an SSL proxy. As you wish. Regards.

1 0

Re: [stunnel-users] Disable SNI in stunnel win32 version
by Lilienberg, Daniel () 05 Mar '13

05 Mar '13

I want to use my Apache as a secure proxy (where Stunnel adds the SSL layer). With SNI enabled, I must send all hosts I want to connect to which is impossible ? This is for internet proxy usage, so all sites on Internet must be available through the proxy. It worked fine before SNI. From: Brian Wilkins [mailto:bwilkins@gmail.com] Sent: den 5 mars 2013 14:14 To: Lilienberg, Daniel () Subject: Re: [stunnel-users] Disable SNI in stunnel win32 version Does this help? http://langui.sh/2009/11/03/ssl-vhosting-on-the-same-ip-aka-sni/ On Tue, Mar 5, 2013 at 8:10 AM, Lilienberg, Daniel () <daniel.lilienberg(a)volvocars.com<mailto:daniel.lilienberg@volvocars.com>> wrote: Hi, In my local vmware setup im using Apache with mod_ssl on the server side and Stunnel on client side to make a secure proxy. Im using Chrome as webbrowser to connect locally to the apache which bounces me to internet. In my setup everything worked with the older Stunnel 4.3x, but when you upgraded to a newer Openssl it enabled SNI and now its broken. Can I disable SNI in any way or so I need to recompile stunnel with an older OpenSSL package ? Im running on Win32. _______________________________________________ stunnel-users mailing list stunnel-users(a)stunnel.org<mailto:stunnel-users@stunnel.org> https://www.stunnel.org/cgi-bin/mailman/listinfo/stunnel-users

1 0

Disable SNI in stunnel win32 version
by Lilienberg, Daniel () 05 Mar '13

05 Mar '13

Hi, In my local vmware setup im using Apache with mod_ssl on the server side and Stunnel on client side to make a secure proxy. Im using Chrome as webbrowser to connect locally to the apache which bounces me to internet. In my setup everything worked with the older Stunnel 4.3x, but when you upgraded to a newer Openssl it enabled SNI and now its broken. Can I disable SNI in any way or so I need to recompile stunnel with an older OpenSSL package ? Im running on Win32.

1 0

Stunnel as an "HTTPS to HTTPS" proxy
by jmwb＠webmail.co.za 04 Mar '13

04 Mar '13

Hi, Please could you tell me if Stunnel supports HTTPS on the client-side i.e. a true SSL proxy with client-side SSL and server-side SSL (or if anyone has developed a version that does)? I have tried searching for this without luck because it is difficult to narrow down the search criteria e.g. Stunnel is already cited as an SSL proxy. jmwb ____________________________________________________________ South Africas premier free email service - www.webmail.co.za For super low premiums, click here. http://www.dialdirect.co.za/landing/oct/1/?vdn=15752

2 1

stunnel 4.55 released (security update)
by Michal Trojnara 03 Mar '13

03 Mar '13

Dear Users, I have released version 4.55 of stunnel. This is a massive bugfix release, including a security bugfix. Update is highly recommended. The ChangeLog entry: Version 4.55, 2013.03.03, urgency: HIGH: * Security bugfix - OpenSSL updated to version 1.0.1e in Win32/Android builds. - Buffer overflow vulnerability fixed in the NTLM authentication of the CONNECT protocol negotiation. See https://www.stunnel.org/CVE-2013-1762.html for details. * New features - SNI wildcard matching in server mode. - Terminal version of stunnel (tstunnel.exe) build for Win32. * Bugfixes - Fixed write half-close handling in the transfer() function (thx to Dustin Lundquist). - Fixed EAGAIN error handling in the transfer() function (thx to Jan Bee). - Restored default signal handlers before execvp() (thx to Michael Weiser). - Fixed memory leaks in protocol negotiation (thx to Arthur Mesh). - Fixed a file descriptor leak during configuration file reload (thx to Arthur Mesh). - Closed SSL sockets were removed from the the transfer() c->fds poll. - Minor fix in handling exotic inetd-mode configurations. - WCE compilation fixes. - IPv6 compilation fix in protocol.c. - Windows installer fixes. Home page: https://www.stunnel.org/ Download: https://www.stunnel.org/downloads.html SHA-256 hash for stunnel-4.55.tar.gz: 5a4acecfabd454415c727435acdfca7dc46aa542998fb278293f494a6d36d37a Best regards, Mike

1 0

Broken pipes and TCP resets on parallel requests over stunnel
by Jan Bee 22 Feb '13

22 Feb '13

Hi, I'm running stunnel (ubuntu 4.42-1, confirmed with 4.54 that has been built from source) against a backend I've only limited control over which was running fine for a long time. At some point in the last few days, the clients stopped being able to make *concurrent* HTTP requests (by different threads) over the stunnel. The client applications using the tunnel enounter a 'Connection refused' error. The issue has been isolated to curl requests (instead of the original client application). Running a tcpdump on both, loopback and uplink, showed that every additional request results in an ACK from the stunnel to both the client and the remote side and a few ms later a RST, ACK is sent in the *same* direction (again from the stunnel to both client and remote end). The stunnel log shows an error about a broken pipe whenever these failures occur: Feb 18 11:09:24 x2 stunnel: LOG7[555:139702117717760]: Socket closed on read Feb 18 11:09:24 x2 stunnel: LOG7[555:139702117717760]: Sending SSL write shutdown Feb 18 11:09:24 x2 stunnel: LOG7[555:139702117717760]: SSL alert (write): warning: close notify Feb 18 11:09:24 x2 stunnel: LOG6[555:139702117717760]: SSL_shutdown successfully sent close_notify Feb 18 11:09:24 x2 stunnel: LOG5[555:139702117717760]: Error detected on socket (read) file descriptor: Broken pipe (32) Feb 18 11:09:24 x2 stunnel: LOG5[555:139702117717760]: Connection reset: 1320 bytes sent to SSL, 48625 bytes sent to socket Feb 18 11:09:24 x2 stunnel: LOG7[555:139702117717760]: Service xtunnel finished (4 left) An strace on the stunnel shows: 6425 <... setsockopt resumed> ) = 0 6425 close(18 <unfinished ...> 6465 poll([{fd=15, events=POLLOUT}, {fd=22, events=POLLIN}], 2, 43200000 <unfinished ...> 6425 <... close resumed> ) = 0 6465 <... poll resumed> ) = 2 ([{fd=15, revents=POLLOUT|POLLERR|POLLHUP}, {fd=22, revents=POLLIN}]) 6425 sendto(13, "<31>Feb 18 11:34:35 stunnel: LOG7[6395:140601236756224]: Service xtunnel finished (4 left)", 99, MSG_NOSIGNAL, NULL, 0 <unf inished ...> 6465 getsockopt(15, SOL_SOCKET, SO_ERROR, [32], [4]) = 0 6425 <... sendto resumed> ) = 99 6465 futex(0x7fe045ec3754, FUTEX_WAIT_PRIVATE, 2, NULL <unfinished ...> 6425 futex(0x7fe045ec3754, FUTEX_WAKE_PRIVATE, 1 <unfinished ...> 6465 <... futex resumed> ) = -1 EAGAIN (Resource temporarily unavailable) 6425 <... futex resumed> ) = 0 6465 sendto(13, "<29>Feb 18 11:34:35 stunnel: LOG5[6395:140601236686592]: Error detected on socket (read) file descriptor: Broken pipe (32)", 122, MSG_NOSIGNAL, NULL, 0 <unfinished ...> 6425 write(2, "2013.02.15 11:34:35 LOG7[6395:140601236756224]: Service xtunnel finished (4 left)\n", 91 <unfinished ...> 6465 <... sendto resumed> ) = 122 6425 <... write resumed> ) = 91 6465 futex(0x7fe045ec3754, FUTEX_WAKE_PRIVATE, 1 <unfinished ...> 6425 sendto(13, "<31>Feb 18 11:34:35 stunnel: LOG7[6395:140601236756224]: str_stats: 0 block(s), 0 byte(s)", 89, MSG_NOSIGNAL, NULL, 0 <unfinished ...> 6465 <... futex resumed> ) = 0 6465 write(2, "2013.02.15 11:34:35 LOG5[6395:140601236686592]: Error detected on socket (read) file descriptor: Broken pipe (32)\n", 114 <unfinished ...> $ ps auxww|grep stunnel4 shows: root 28587 0.1 0.0 437844 7780 ? Ss 09:37 0:11 /usr/bin/stunnel4 /etc/xtunnel/stunnel.conf root 29170 0.0 0.0 43876 1180 ? S 09:37 0:00 /usr/bin/stunnel4 /etc/xtunnel/stunnel.conf root 29171 0.0 0.0 43876 1180 ? S 09:37 0:00 /usr/bin/stunnel4 /etc/xtunnel/stunnel.conf root 29172 0.0 0.0 43876 1180 ? S 09:37 0:00 /usr/bin/stunnel4 /etc/xtunnel/stunnel.conf root 29173 0.0 0.0 43876 1180 ? S 09:37 0:00 /usr/bin/stunnel4 /etc/xtunnel/stunnel.conf root 29174 0.0 0.0 43876 1180 ? S 09:37 0:00 /usr/bin/stunnel4 /etc/xtunnel/stunnel.conf The stunnel config looks like this: foreground=yes debug=7 pid=/var/run/xtunnel.pid client=yes CAfile=/etc/ssl/certs/xtunnel-chains.pem verify=3 engine=dynamic engineCtrl=SO_PATH:/usr/lib/engines/engine_pkcs11.so engineCtrl=ID:pkcs11 engineCtrl=LIST_ADD:1 engineCtrl=LOAD engineCtrl=MODULE_PATH:libopencryptoki.so.0 engineCtrl=INIT engineCtrl=PIN:XXXXXX [xtunnel] engineNum=1 key=id_4 cert=/etc/xtunnel/client-cert.pem accept=127.0.0.1:9999 connect=192.168.200.1:8443 Does anyone have an idea what could be going wrong here or how to troubleshoot this any further? Thanks! Jan

1 0

Stunnel in pgsql mode, libpq, and SSL session caching..
by Matt Wise 17 Feb '13

17 Feb '13

Is there any level of SSL Session Caching when using Stunnel in pgsql mode, and using libpq-based Postgres clients? If not, I'm wondering what tuning we can do on the Stunnel side to get the best performance if we have alot of clients that connect very fequently to the servers.. --matt

1 0

STUNNEL --- How to chose the AES cipher with TLS v1.2
by Editor 14 Feb '13

14 Feb '13

Hi to all: In reading the FAQ and looking at the sample configuration file, I do not see an example of how to correctly configure the application to use the more current AES-256 or the AES-128 cipher configurations. I do have the current OpenSSL on the host (a Sun SPARC box). The idea is to use this host as a SSL proxy for a number of services. I did see this reference: options = CIPHER_SERVER_PREFERENCE But not how to then set the SSL cipher except as I found on Google. There was this on the MAN page but it seems to fail in my configuration: ciphers = cipherlist Select permitted SSL ciphers. A colon delimited list of the ciphers to allow in the SSL connection. For example DES-CBC3-SHA:IDEA-CBC-MD5 Thanks. Kevin Reference Ciphers supported by OpenSSL: http://www.openssl.org/docs/apps/ciphers.html

2 1

stunnel port question
by Stewart Anderson 13 Feb '13

13 Feb '13

Hi all, ty in advance for any help. I have a service that I can connect to a destination over stunnel, but I am not able to get the ack I expect. Internal sending service => stunnel => external listening service I think the problem may be that the firewall is blocking inbound traffic. I need to specify a specific port for the firewall team to open so that traffic can get back to my stunnel service, since every time stunnel starts it will be making a connection from a different port on the external facing side of the SSL encapsulation service/pipe/whatever you want to call it!! What would be the best way to configure stunnel for that scenario. I can see the INETD mode but that does not seem to be what I am looking for, I can also see the transparent option but not sure what that really does. Any advice appreciated. Regards Stewart Your Hospital needs YOU! We need you to register as a Public, Patient or Staff member and help shape the future of your healthcare. Call 0800 280 2581 to register by phone or you can email bradfordhospitals(a)capitaregistrars.com<mailto:bradfordhospitals@capitaregistrars.com> and ask to be registered as a new member. For more information about our hospitals and Foundation Trust Membership please visit www.bradfordhospitals.nhs.uk<http://www.bradfordhospitals.nhs.uk> This message is confidential. It may also contain privileged information. The contents of this e-mail and any attachments are intended for the named addressee only. Unless you are the named addressee or authorised to receive the e-mail of the named addressee you may not disclose, use or copy the contents of the e-mail. If you are not the person for whom the message was intended, please notify the sender immediately at Bradford Teaching Hospitals NHS Foundation Trust and delete the material from your computer. You must not use the message for any other purpose, nor disclose its contents to any person other than the intended recipient. Bradford Teaching Hospitals NHS Foundation Trust does not accept responsibility for this message and any views or opinions contained in this e-mail are solely those of the author unless expressly stated otherwise.

1 0

Stunnel over a separate proxy?
by Alex Gottschalk 12 Feb '13

12 Feb '13

I've successfully deployed stunnel4 to wrap rsync for transferring data between remote sites and a central repository. The issue I'm running into, is that some of these sites mandate use of a proxy (HTTP or SOCKS5 usually) for outbound network connections. It seems like there is some proxy support in stunnel with the protocol{Host,Authentication,etc} configuration options, but I have had zero luck getting them to work. For example, I've tried making a simple SOCKS5 proxy using ssh, that I'm successfully able to send HTTP traffic over: ssh -g -D1080 proxy-host # create the proxy, open port 1080 on a public interface then in the client stunnel.conf: [rsync] protocol = connect protocolHost = proxy-host:1080 accept = 127.0.0.1:873 connect = rsync-destination:443 Keep in mind this is an already-working stunnel - the only difference is the addition of the protocol and protocolHost lines above. When I run stunnel in the foreground with that configuration change, I get the following error trying to run rsync: $ rsync -v dev.inst.kvpdata rsync://localhost/putdata/ rsync: read error: Connection reset by peer (104) rsync error: error in rsync protocol data stream (code 12) at io.c(605) [sender=2.6.9] And no log messages appear in stunnel's stderr whatsoever. What am I doing wrong? I get identical results using an HTTP proxy with squid, instead of the socks5 proxy. Thanks, please let me know if there's any more information I should include to help with figuring this out. Alex Gottschalk

3 4

transfer() loop executes not transferring any data and truncated data when using unix sockets
by Stephen Balukoff 08 Feb '13

08 Feb '13

Hello! Recently we started seeing some erroneous behavior in one of our load balancer configurations in which we're using stunnel for SSL tunnel termination with web clients. Specifically, the setup looks like the following: Web client ---(SSL)---> stunnel ---(unix socket)--> haproxy ---(tcp/http)---> web server After extensive troubleshooting we were able to determine that when the following parameters are present: * Client forces non-keepalive connection * Client generates a POST request, the response to which (generated by the back-end web server) is greater than about 8k * stunnel and haproxy communicate via unix socket ...then most responses end up being truncated by an extraneous TCP RST packet from stunnel, and the following log lines are generated: Jan 23 15:24:17 ds420a stunnel: LOG3[22586:139835614443264]: transfer() loop executes not transferring any data Jan 23 15:24:17 ds420a stunnel: LOG3[22586:139835614443264]: please report the problem to Michal.Trojnara(a)mirt.net Jan 23 15:24:17 ds420a stunnel: LOG3[22586:139835614443264]: stunnel 4.54 on x86_64-unknown-linux-gnu platform Jan 23 15:24:17 ds420a stunnel: LOG3[22586:139835614443264]: Compiled/running with OpenSSL 1.0.0-fips 29 Mar 2010 Jan 23 15:24:17 ds420a stunnel: LOG3[22586:139835614443264]: Threading:PTHREAD SSL:+ENGINE+OCSP+FIPS Auth:none Sockets:POLL+IPv6 Jan 23 15:24:17 ds420a stunnel: LOG3[22586:139835614443264]: protocol=TLSv1, SSL_pending=0 Jan 23 15:24:17 ds420a stunnel: LOG3[22586:139835614443264]: sock_open_rd=n, sock_open_wr=Y Jan 23 15:24:17 ds420a stunnel: LOG3[22586:139835614443264]: SSL_RECEIVED_SHUTDOWN=n, SSL_SENT_SHUTDOWN=Y Jan 23 15:24:17 ds420a stunnel: LOG3[22586:139835614443264]: sock_can_rd=Y, sock_can_wr=n Jan 23 15:24:17 ds420a stunnel: LOG3[22586:139835614443264]: ssl_can_rd=n, ssl_can_wr=n Jan 23 15:24:17 ds420a stunnel: LOG3[22586:139835614443264]: read_wants_read=Y, read_wants_write=n Jan 23 15:24:17 ds420a stunnel: LOG3[22586:139835614443264]: write_wants_read=n, write_wants_write=n Jan 23 15:24:17 ds420a stunnel: LOG3[22586:139835614443264]: shutdown_wants_read=n, shutdown_wants_write=n Jan 23 15:24:17 ds420a stunnel: LOG3[22586:139835614443264]: socket input buffer: 0 byte(s), ssl input buffer: 0 byte(s) The work arounds we have found are either: 1. Make stunnel and haproxy communicate over a TCP socket bound to the loopback interface (less ideal, as then we're limited to 65k connections) 2. Add the "reset=no" parameter to our stunnel.conf (which seems to fix the problem, but makes me wonder if we're not opening ourselves up to other problems-- like really getting stuck in an infinite loop that that watchdog is intended to avoid.) In any case based on what "reset=no" is supposed to do as well as where that first line of the error output above is being generated in the code, it's clear that the main client data transfer loop in client.c (starting line 519) is being called too often with no data to transfer, which triggers the infinite loop detection in the transfer() function (client.c, starting line 832). My best hypothesis at this point is that the transfer() code was written only with TCP sockets in mind, and that something about the unix socket in use here is triggering that loop too often. Maybe s_poll_wait on line 541 is being called with parameters which are right for a TCP socket but inappropriate for a unix socket? At this point though, we're at the limit of my socket programming ability, so I'm a little stuck. (Would like to have simply fixed this and submitted a patch... but cest la vie, eh.) We'd like to avoid using a TCP socket to communicate between stunnel and haproxy simply because it's a little less efficient, and because there's an artificial 65k limit on the number of back-end connections we can support per loopback IP if we do that. Alternatively, if someone could verify that "reset=no" is an acceptable / safe work around in this case, I'd appreciate that (though, of course, I'd prefer my logs not to get spammed on every connection. :P ) Is there any other data I can provide to help troubleshoot and fix this? Thanks, Stephen -- Stephen Balukoff Blue Box Group, LLC (800)613-4305 x807

3 3

LZ4
by Death Master 06 Feb '13

06 Feb '13

Do you plan adding LZ4(much faster than gzip) support to stunnel?

2 1

Re: [stunnel-users] fix resource leaks and potential null
by Arthur Mesh 05 Feb '13

05 Feb '13

dereferences in 4.54 Reply-To: In-Reply-To: <mailman.1.1359889202.25775.stunnel-users(a)stunnel.org> On Sun, Feb 03, 2013 at 12:00:02PM +0100, stunnel-users-request(a)stunnel.org wrote: > > - char line_text[CONFLINELEN], *errstr; > > + char line_text[CONFLINELEN], *errstr = NULL; > Were you able to identify a case where it's used without > initialization? This is interesting. > It would be a good idea to fix it there instead of implementing a > workaround here. Hi, I will provide the output of coverity run for these defect: int parse_conf(char *name, CONF_TYPE type) { 1997 DISK_FILE *df; At (1): Declaring variable "errstr" without initializer. 1998 char line_text[CONFLINELEN], *errstr; 1999 char config_line[CONFLINELEN], *config_opt, *config_arg; 2000 int line_number, i; 2001 SERVICE_OPTIONS *section, *new_section; 2002 static char *filename=NULL; /* a copy of config file name for reloading */ 2003#ifndef USE_WIN32 2004 int fd; 2005 char *tmpstr; 2006#endif 2007 At (2): Condition "name", taking true branch 2008 if(name) /* not reload */ 2009 filename=str_dup(name); 2010 At (3): Condition "type == 2U", taking true branch 2011 s_log(LOG_NOTICE, "Reading configuration from %s %s", 2012 type==CONF_FD ? "descriptor" : "file", filename); 2013#ifndef USE_WIN32 At (4): Condition "type == 2U", taking true branch 2014 if(type==CONF_FD) { /* file descriptor */ 2015 fd=strtol(filename, &tmpstr, 10); At (5): Condition "tmpstr == filename", taking false branch At (6): Condition "*tmpstr", taking false branch 2016 if(tmpstr==filename || *tmpstr) { /* not a number */ 2017 s_log(LOG_ERR, "Invalid file descriptor number"); 2018 print_syntax(); 2019 return 1; 2020 } 2021 df=file_fdopen(fd); At (7): Falling through to end of if statement 2022 } else 2023#endif 2024 df=file_open(filename, 0); At (8): Condition "!df", taking false branch 2025 if(!df) { 2026 s_log(LOG_ERR, "Cannot read configuration"); 2027 if(type!=CONF_RELOAD) 2028 print_syntax(); 2029 return 1; 2030 } 2031 2032 memset(&new_global_options, 0, sizeof(GLOBAL_OPTIONS)); /* reset global options */ 2033 memset(&new_service_options, 0, sizeof(SERVICE_OPTIONS)); /* reset local options */ 2034 new_service_options.next=NULL; 2035 section=&new_service_options; 2036 parse_global_option(CMD_BEGIN, NULL, NULL); 2037 parse_service_option(CMD_BEGIN, section, NULL, NULL); At (9): Condition "type != 0U", taking true branch 2038 if(type!=CONF_RELOAD) { /* provide defaults for gui.c */ 2039 memcpy(&global_options, &new_global_options, sizeof(GLOBAL_OPTIONS)); 2040 memcpy(&service_options, &new_service_options, sizeof(SERVICE_OPTIONS)); 2041 } 2042 2043 line_number=0; At (10): Condition "file_getline(df, line_text, 16384) >= 0", taking true branch At (19): Condition "file_getline(df, line_text, 16384) >= 0", taking false branch 2044 while(file_getline(df, line_text, CONFLINELEN)>=0) { 2045 memcpy(config_line, line_text, CONFLINELEN); 2046 ++line_number; 2047 config_opt=config_line; At (11): Condition "__istype((unsigned char)*config_opt, 16384UL)", taking true branch At (12): Condition "__istype((unsigned char)*config_opt, 16384UL)", taking false branch 2048 while(isspace((unsigned char)*config_opt)) 2049 ++config_opt; /* remove initial whitespaces */ At (13): Condition "i >= 0", taking true branch At (14): Condition "__istype((unsigned char)config_opt[i], 16384UL)", taking true branch At (15): Condition "i >= 0", taking true branch At (16): Condition "__istype((unsigned char)config_opt[i], 16384UL)", taking false branch 2050 for(i=strlen(config_opt)-1; i>=0 && isspace((unsigned char)config_opt[i]); --i) 2051 config_opt[i]='\0'; /* remove trailing whitespaces */ At (17): Condition "config_opt[0] == 0", taking true branch 2052 if(config_opt[0]=='\0' || config_opt[0]=='#' || config_opt[0]==';') /* empty or comment */ At (18): Continuing loop 2053 continue; 2054 if(config_opt[0]=='[' && config_opt[strlen(config_opt)-1]==']') { /* new section */ 2055 if(!new_service_options.next) { 2056 errstr=parse_global_option(CMD_END, NULL, NULL); 2057 if(errstr) { 2058 s_log(LOG_ERR, "Line %d: \"%s\": %s", line_number, line_text, errstr); 2059 file_close(df); 2060 return 1; 2061 } 2062 } 2063 ++config_opt; 2064 config_opt[strlen(config_opt)-1]='\0'; 2065 new_section=str_alloc(sizeof(SERVICE_OPTIONS)); 2066 memcpy(new_section, &new_service_options, sizeof(SERVICE_OPTIONS)); 2067 new_section->servname=str_dup(config_opt); 2068 new_section->session=NULL; 2069 new_section->next=NULL; 2070 section->next=new_section; 2071 section=new_section; 2072 continue; 2073 } 2074 config_arg=strchr(config_line, '='); 2075 if(!config_arg) { 2076 s_log(LOG_ERR, "Line %d: \"%s\": No '=' found", line_number, line_text); 2077 file_close(df); 2078 return 1; 2079 } 2080 *config_arg++='\0'; /* split into option name and argument value */ 2081 for(i=strlen(config_opt)-1; i>=0 && isspace((unsigned char)config_opt[i]); --i) 2082 config_opt[i]='\0'; /* remove trailing whitespaces */ 2083 while(isspace((unsigned char)*config_arg)) 2084 ++config_arg; /* remove initial whitespaces */ 2085 errstr=parse_service_option(CMD_EXEC, section, config_opt, config_arg); 2086 if(!new_service_options.next && errstr==option_not_found) 2087 errstr=parse_global_option(CMD_EXEC, config_opt, config_arg); 2088 if(errstr) { 2089 s_log(LOG_ERR, "Line %d: \"%s\": %s", line_number, line_text, errstr); 2090 file_close(df); 2091 return 1; 2092 } 2093 } 2094 file_close(df); 2095 At (20): Condition "new_service_options.next", taking true branch 2096 if(new_service_options.next) { /* daemon mode: initialize sections */ At (21): Condition "section", taking false branch 2097 for(section=new_service_options.next; section; section=section->next) { 2098 s_log(LOG_INFO, "Initializing service [%s]", section->servname); 2099 errstr=parse_service_option(CMD_END, section, NULL, NULL); 2100 if(errstr) 2101 break; 2102 } At (22): Falling through to end of if statement 2103 } else { /* inetd mode: need to initialize global options */ 2104 errstr=parse_global_option(CMD_END, NULL, NULL); 2105 if(errstr) { 2106 s_log(LOG_ERR, "Global options: %s", errstr); 2107 return 1; 2108 } 2109 s_log(LOG_INFO, "Initializing inetd mode configuration"); 2110 section=&new_service_options; 2111 errstr=parse_service_option(CMD_END, section, NULL, NULL); 2112 } CID 32706: Uninitialized pointer read (UNINIT)At (23): Using uninitialized value "errstr". 2113 if(errstr) { CID 32693: Dereference after null check (FORWARD_NULL) [select defect] 2114 s_log(LOG_ERR, "Service [%s]: %s", section->servname, errstr); 2115 return 1; 2116 } > > - s_log(LOG_ERR, "Service [%s]: %s", section->servname, errstr); > > + s_log(LOG_ERR, "Service [%s]: %s", section ? section->servname : "", > > + errstr); > Again it would be useful to fix the root cause instead of implementing a > workaround. Coverity output: At (1): Condition "name", taking true branch 2008 if(name) /* not reload */ 2009 filename=str_dup(name); 2010 At (2): Condition "type == 2U", taking true branch 2011 s_log(LOG_NOTICE, "Reading configuration from %s %s", 2012 type==CONF_FD ? "descriptor" : "file", filename); 2013#ifndef USE_WIN32 At (3): Condition "type == 2U", taking true branch 2014 if(type==CONF_FD) { /* file descriptor */ 2015 fd=strtol(filename, &tmpstr, 10); At (4): Condition "tmpstr == filename", taking false branch At (5): Condition "*tmpstr", taking false branch 2016 if(tmpstr==filename || *tmpstr) { /* not a number */ 2017 s_log(LOG_ERR, "Invalid file descriptor number"); 2018 print_syntax(); 2019 return 1; 2020 } 2021 df=file_fdopen(fd); At (6): Falling through to end of if statement 2022 } else 2023#endif 2024 df=file_open(filename, 0); At (7): Condition "!df", taking false branch 2025 if(!df) { 2026 s_log(LOG_ERR, "Cannot read configuration"); 2027 if(type!=CONF_RELOAD) 2028 print_syntax(); 2029 return 1; 2030 } 2031 2032 memset(&new_global_options, 0, sizeof(GLOBAL_OPTIONS)); /* reset global options */ 2033 memset(&new_service_options, 0, sizeof(SERVICE_OPTIONS)); /* reset local options */ 2034 new_service_options.next=NULL; 2035 section=&new_service_options; 2036 parse_global_option(CMD_BEGIN, NULL, NULL); 2037 parse_service_option(CMD_BEGIN, section, NULL, NULL); At (8): Condition "type != 0U", taking true branch 2038 if(type!=CONF_RELOAD) { /* provide defaults for gui.c */ 2039 memcpy(&global_options, &new_global_options, sizeof(GLOBAL_OPTIONS)); 2040 memcpy(&service_options, &new_service_options, sizeof(SERVICE_OPTIONS)); 2041 } 2042 2043 line_number=0; At (9): Condition "file_getline(df, line_text, 16384) >= 0", taking true branch At (18): Condition "file_getline(df, line_text, 16384) >= 0", taking false branch 2044 while(file_getline(df, line_text, CONFLINELEN)>=0) { 2045 memcpy(config_line, line_text, CONFLINELEN); 2046 ++line_number; 2047 config_opt=config_line; At (10): Condition "__istype((unsigned char)*config_opt, 16384UL)", taking true branch At (11): Condition "__istype((unsigned char)*config_opt, 16384UL)", taking false branch 2048 while(isspace((unsigned char)*config_opt)) 2049 ++config_opt; /* remove initial whitespaces */ At (12): Condition "i >= 0", taking true branch At (13): Condition "__istype((unsigned char)config_opt[i], 16384UL)", taking true branch At (14): Condition "i >= 0", taking true branch At (15): Condition "__istype((unsigned char)config_opt[i], 16384UL)", taking false branch 2050 for(i=strlen(config_opt)-1; i>=0 && isspace((unsigned char)config_opt[i]); --i) 2051 config_opt[i]='\0'; /* remove trailing whitespaces */ At (16): Condition "config_opt[0] == 0", taking true branch 2052 if(config_opt[0]=='\0' || config_opt[0]=='#' || config_opt[0]==';') /* empty or comment */ At (17): Continuing loop 2053 continue; 2054 if(config_opt[0]=='[' && config_opt[strlen(config_opt)-1]==']') { /* new section */ 2055 if(!new_service_options.next) { 2056 errstr=parse_global_option(CMD_END, NULL, NULL); 2057 if(errstr) { 2058 s_log(LOG_ERR, "Line %d: \"%s\": %s", line_number, line_text, errstr); 2059 file_close(df); 2060 return 1; 2061 } 2062 } 2063 ++config_opt; 2064 config_opt[strlen(config_opt)-1]='\0'; 2065 new_section=str_alloc(sizeof(SERVICE_OPTIONS)); 2066 memcpy(new_section, &new_service_options, sizeof(SERVICE_OPTIONS)); 2067 new_section->servname=str_dup(config_opt); 2068 new_section->session=NULL; 2069 new_section->next=NULL; 2070 section->next=new_section; 2071 section=new_section; 2072 continue; 2073 } 2074 config_arg=strchr(config_line, '='); 2075 if(!config_arg) { 2076 s_log(LOG_ERR, "Line %d: \"%s\": No '=' found", line_number, line_text); 2077 file_close(df); 2078 return 1; 2079 } 2080 *config_arg++='\0'; /* split into option name and argument value */ 2081 for(i=strlen(config_opt)-1; i>=0 && isspace((unsigned char)config_opt[i]); --i) 2082 config_opt[i]='\0'; /* remove trailing whitespaces */ 2083 while(isspace((unsigned char)*config_arg)) 2084 ++config_arg; /* remove initial whitespaces */ 2085 errstr=parse_service_option(CMD_EXEC, section, config_opt, config_arg); 2086 if(!new_service_options.next && errstr==option_not_found) 2087 errstr=parse_global_option(CMD_EXEC, config_opt, config_arg); 2088 if(errstr) { 2089 s_log(LOG_ERR, "Line %d: \"%s\": %s", line_number, line_text, errstr); 2090 file_close(df); 2091 return 1; 2092 } 2093 } 2094 file_close(df); 2095 At (19): Condition "new_service_options.next", taking true branch 2096 if(new_service_options.next) { /* daemon mode: initialize sections */ At (20): Comparing "section" to null implies that "section" might be null. At (21): Condition "section", taking false branch 2097 for(section=new_service_options.next; section; section=section->next) { 2098 s_log(LOG_INFO, "Initializing service [%s]", section->servname); 2099 errstr=parse_service_option(CMD_END, section, NULL, NULL); 2100 if(errstr) 2101 break; 2102 } At (22): Falling through to end of if statement 2103 } else { /* inetd mode: need to initialize global options */ 2104 errstr=parse_global_option(CMD_END, NULL, NULL); 2105 if(errstr) { 2106 s_log(LOG_ERR, "Global options: %s", errstr); 2107 return 1; 2108 } 2109 s_log(LOG_INFO, "Initializing inetd mode configuration"); 2110 section=&new_service_options; 2111 errstr=parse_service_option(CMD_END, section, NULL, NULL); 2112 } CID 32706: Uninitialized pointer read (UNINIT) [select defect] At (23): Condition "errstr", taking true branch 2113 if(errstr) { CID 32693: Dereference after null check (FORWARD_NULL)At (24): Dereferencing null pointer "section". 2114 s_log(LOG_ERR, "Service [%s]: %s", section->servname, errstr); 2115 return 1; 2116 } > > - if(!strcasecmp(fl->name, string)) { > > + if(string && !strcasecmp(fl->name, string)) { > Could you give an example parameter where "string" may be NULL here? 2238/* facilities only make sense on Unix */ 2239#if !defined (USE_WIN32) && !defined (__vms) At (1): Condition "strchr(string, 46)", taking true branch 2240 if(strchr(string, '.')) { /* we have a facility specified */ 2241 new_global_options.facility=-1; 2242 string=strtok(arg_copy, "."); /* break it up */ 2243 At (2): Condition "fl->name", taking true branch 2244 for(fl=facilities; fl->name; ++fl) { At (3): Condition "!strcasecmp(fl->name, string)", taking true branch 2245 if(!strcasecmp(fl->name, string)) { 2246 new_global_options.facility=fl->value; At (4): Breaking from loop 2247 break; 2248 } 2249 } At (5): Condition "new_global_options.facility == -1", taking false branch 2250 if(new_global_options.facility==-1) 2251 return 1; /* FAILED */ 2252 string=strtok(NULL, "."); /* set to the remainder */ 2253 } 2254#endif /* USE_WIN32, __vms */ 2255 2256 /* time to check the syslog level */ At (6): Comparing "string" to null implies that "string" might be null. At (7): Condition "string", taking false branch 2257 if(string && strlen(string)==1 && *string>='0' && *string<='7') { 2258 new_global_options.debug_level=*string-'0'; 2259 return 0; /* OK */ 2260 } 2261 new_global_options.debug_level=8; /* illegal level */ At (8): Condition "fl->name", taking true branch 2262 for(fl=levels; fl->name; ++fl) { CID 11183: Dereference after null check (FORWARD_NULL)At (9): Passing null pointer "string" to function "strcasecmp(char const *, char const *)", which dereferences it. 2263 if(!strcasecmp(fl->name, string)) { 2264 new_global_options.debug_level=fl->value; 2265 break; 2266 } 2267 } 2268 if(new_global_options.debug_level==8) 2269 return 1; /* FAILED */ 2270 return 0; /* OK */ 2271} Let me know if more info is required. Thanks

5 16

fix resource leaks and potential null dereferences in 4.54
by Arthur Mesh 03 Feb '13

03 Feb '13

Hi, I am trying to figure out where bug reports should be submitted. https://www.stunnel.org/lists.html references this mailing list, so here is my attempt at a bug report with a potential fix. If this is not an appropriate list, please redirect me. A coverity run has uncovered quite a few memory and other resource leaks, plus some potential NULL dereferences. Inline is an attempt to fix them. Imho, these are mostly self-explanatory, but if someone needs more details, I would be happy to provide those as well. Thanks diff -ru stunnel-4.54/src/options.c stunnel-4.54.p/src/options.c --- stunnel-4.54/src/options.c 2012-10-09 01:50:54.000000000 -0700 +++ stunnel-4.54.p/src/options.c 2013-01-29 16:26:00.000000000 -0800 @@ -1988,7 +1988,7 @@ int parse_conf(char *name, CONF_TYPE type) { DISK_FILE *df; - char line_text[CONFLINELEN], *errstr; + char line_text[CONFLINELEN], *errstr = NULL; char config_line[CONFLINELEN], *config_opt, *config_arg; int line_number, i; SERVICE_OPTIONS *section, *new_section; @@ -2104,7 +2104,8 @@ errstr=parse_service_option(CMD_END, section, NULL, NULL); } if(errstr) { - s_log(LOG_ERR, "Service [%s]: %s", section->servname, errstr); + s_log(LOG_ERR, "Service [%s]: %s", section ? section->servname : "", + errstr); return 1; } @@ -2253,7 +2254,7 @@ } new_global_options.debug_level=8; /* illegal level */ for(fl=levels; fl->name; ++fl) { - if(!strcasecmp(fl->name, string)) { + if(string && !strcasecmp(fl->name, string)) { new_global_options.debug_level=fl->value; break; } @@ -2428,6 +2429,7 @@ if(get_last_socket_error()!=S_ENOPROTOOPT) { s_log(LOG_ERR, "Failed to get %s OS default", ptr->opt_str); sockerror("getsockopt"); + close(fd); return 1; /* FAILED */ } td=str_dup("write-only"); @@ -2442,6 +2444,7 @@ ptr->opt_str, ta, tl, tr, td); str_free(ta); str_free(tl); str_free(tr); str_free(td); } + close(fd); return 0; /* OK */ } Only in stunnel-4.54.p/src: options.c.orig diff -ru stunnel-4.54/src/protocol.c stunnel-4.54.p/src/protocol.c --- stunnel-4.54/src/protocol.c 2012-10-09 01:46:47.000000000 -0700 +++ stunnel-4.54.p/src/protocol.c 2013-01-29 16:26:00.000000000 -0800 @@ -244,30 +244,36 @@ /**************************************** smtp */ static void smtp_client(CLI *c) { - char *line; + char *line = NULL; do { /* copy multiline greeting */ + str_free(line); /* okay to str_free(NULL) */ line=fd_getline(c, c->remote_fd.fd); fd_putline(c, c->local_wfd.fd, line); } while(isprefix(line, "220-")); fd_putline(c, c->remote_fd.fd, "EHLO localhost"); do { /* skip multiline reply */ + str_free(line); line=fd_getline(c, c->remote_fd.fd); } while(isprefix(line, "250-")); if(!isprefix(line, "250 ")) { /* error */ + str_free(line); s_log(LOG_ERR, "Remote server is not RFC 1425 compliant"); longjmp(c->err, 1); } fd_putline(c, c->remote_fd.fd, "STARTTLS"); do { /* skip multiline reply */ + str_free(line); line=fd_getline(c, c->remote_fd.fd); } while(isprefix(line, "220-")); if(!isprefix(line, "220 ")) { /* error */ + str_free(line); s_log(LOG_ERR, "Remote server is not RFC 2487 compliant"); longjmp(c->err, 1); } + str_free(line); } static void smtp_server(CLI *c) { @@ -290,21 +296,27 @@ line=fd_getline(c, c->remote_fd.fd); if(!isprefix(line, "220")) { s_log(LOG_ERR, "Unknown server welcome"); + str_free(line); longjmp(c->err, 1); } fd_printf(c, c->local_wfd.fd, "%s + stunnel", line); + str_free(line); line=fd_getline(c, c->local_rfd.fd); if(!isprefix(line, "EHLO ")) { s_log(LOG_ERR, "Unknown client EHLO"); + str_free(line); longjmp(c->err, 1); } fd_printf(c, c->local_wfd.fd, "250-%s Welcome", line); + str_free(line); fd_putline(c, c->local_wfd.fd, "250 STARTTLS"); line=fd_getline(c, c->local_rfd.fd); if(!isprefix(line, "STARTTLS")) { s_log(LOG_ERR, "STARTTLS expected"); + str_free(line); longjmp(c->err, 1); } + str_free(line); fd_putline(c, c->local_wfd.fd, "220 Go ahead"); } @@ -316,15 +328,19 @@ line=fd_getline(c, c->remote_fd.fd); if(!isprefix(line, "+OK ")) { s_log(LOG_ERR, "Unknown server welcome"); + str_free(line); longjmp(c->err, 1); } fd_putline(c, c->local_wfd.fd, line); + str_free(line); fd_putline(c, c->remote_fd.fd, "STLS"); line=fd_getline(c, c->remote_fd.fd); if(!isprefix(line, "+OK ")) { s_log(LOG_ERR, "Server does not support TLS"); + str_free(line); longjmp(c->err, 1); } + str_free(line); } static void pop3_server(CLI *c) { @@ -332,17 +348,21 @@ line=fd_getline(c, c->remote_fd.fd); fd_printf(c, c->local_wfd.fd, "%s + stunnel", line); + str_free(line); line=fd_getline(c, c->local_rfd.fd); if(isprefix(line, "CAPA")) { /* client wants RFC 2449 extensions */ fd_putline(c, c->local_wfd.fd, "+OK Stunnel capability list follows"); fd_putline(c, c->local_wfd.fd, "STLS"); fd_putline(c, c->local_wfd.fd, "."); + str_free(line); line=fd_getline(c, c->local_rfd.fd); } if(!isprefix(line, "STLS")) { + str_free(line); s_log(LOG_ERR, "Client does not want TLS"); longjmp(c->err, 1); } + str_free(line); fd_putline(c, c->local_wfd.fd, "+OK Stunnel starts TLS negotiation"); } @@ -353,18 +373,22 @@ line=fd_getline(c, c->remote_fd.fd); if(!isprefix(line, "* OK")) { + str_free(line); s_log(LOG_ERR, "Unknown server welcome"); longjmp(c->err, 1); } fd_putline(c, c->local_wfd.fd, line); + str_free(line); fd_putline(c, c->remote_fd.fd, "stunnel STARTTLS"); line=fd_getline(c, c->remote_fd.fd); if(!isprefix(line, "stunnel OK")) { + str_free(line); fd_putline(c, c->local_wfd.fd, "* BYE stunnel: Server does not support TLS"); s_log(LOG_ERR, "Server does not support TLS"); longjmp(c->err, 2); /* don't reset */ } + str_free(line); } static void imap_server(CLI *c) { @@ -387,6 +411,7 @@ /* process server welcome and send it to client */ line=fd_getline(c, c->remote_fd.fd); if(!isprefix(line, "* OK")) { + str_free(line); s_log(LOG_ERR, "Unknown server welcome"); longjmp(c->err, 1); } @@ -396,22 +421,29 @@ if(capa) *capa='K'; /* disable CAPABILITY within greeting */ fd_printf(c, c->local_wfd.fd, "%s (stunnel)", line); + str_free(line); while(1) { /* process client commands */ line=fd_getline(c, c->local_rfd.fd); /* split line into id and tail */ id=str_dup(line); tail=strchr(id, ' '); - if(!tail) + if(!tail) { + str_free(line); + str_free(id); break; + } *tail++='\0'; if(isprefix(tail, "STARTTLS")) { fd_printf(c, c->local_wfd.fd, "%s OK Begin TLS negotiation now", id); + str_free(line); + str_free(id); return; /* success */ } else if(isprefix(tail, "CAPABILITY")) { fd_putline(c, c->remote_fd.fd, line); /* send it to server */ + str_free(line); line=fd_getline(c, c->remote_fd.fd); /* get the capabilites */ if(*line=='*') { /* @@ -421,6 +453,7 @@ * LOGIN would fail as "unexpected command", anyway */ fd_printf(c, c->local_wfd.fd, "%s STARTTLS", line); + str_free(line); line=fd_getline(c, c->remote_fd.fd); /* next line */ } fd_putline(c, c->local_wfd.fd, line); /* forward to the client */ @@ -429,24 +462,35 @@ fd_putline(c, c->local_wfd.fd, "* BYE unexpected server response"); s_log(LOG_ERR, "Unexpected server response: %s", line); + str_free(line); + str_free(id); break; } + str_free(line); + str_free(id); } else if(isprefix(tail, "LOGOUT")) { fd_putline(c, c->local_wfd.fd, "* BYE server terminating"); fd_printf(c, c->local_wfd.fd, "%s OK LOGOUT completed", id); + str_free(id); + str_free(line); break; } else { fd_putline(c, c->local_wfd.fd, "* BYE stunnel: unexpected command"); fd_printf(c, c->local_wfd.fd, "%s BAD %s unexpected", id, tail); s_log(LOG_ERR, "Unexpected client command %s", tail); + str_free(line); + str_free(id); break; } } /* clean server shutdown */ fd_putline(c, c->remote_fd.fd, "stunnel LOGOUT"); line=fd_getline(c, c->remote_fd.fd); - if(*line=='*') + if(*line=='*') { + str_free(line); line=fd_getline(c, c->remote_fd.fd); + } + str_free(line); longjmp(c->err, 2); /* don't reset */ } @@ -458,15 +502,19 @@ line=fd_getline(c, c->remote_fd.fd); if(!isprefix(line, "200 ") && !isprefix(line, "201 ")) { s_log(LOG_ERR, "Unknown server welcome"); + str_free(line); longjmp(c->err, 1); } fd_putline(c, c->local_wfd.fd, line); fd_putline(c, c->remote_fd.fd, "STARTTLS"); + str_free(line); line=fd_getline(c, c->remote_fd.fd); if(!isprefix(line, "382 ")) { s_log(LOG_ERR, "Server does not support TLS"); + str_free(line); longjmp(c->err, 1); } + str_free(line); } /**************************************** connect */ @@ -548,13 +596,17 @@ /* not "HTTP/1.0 200 Connection established" */ s_log(LOG_ERR, "CONNECT request rejected"); do { /* read all headers */ + str_free(line); line=fd_getline(c, c->remote_fd.fd); } while(*line); + str_free(line); longjmp(c->err, 1); } + str_free(line); s_log(LOG_INFO, "CONNECT request accepted"); do { line=fd_getline(c, c->remote_fd.fd); /* read all headers */ + str_free(line); } while(*line); } @@ -588,10 +640,13 @@ if(line[9]!='4' || line[10]!='0' || line[11]!='7') { /* code 407 */ s_log(LOG_ERR, "NTLM authorization request rejected"); do { /* read all headers */ + str_free(line); line=fd_getline(c, c->remote_fd.fd); } while(*line); + str_free(line); longjmp(c->err, 1); } + str_free(line); ntlm2_txt=NULL; do { /* read all headers */ line=fd_getline(c, c->remote_fd.fd); @@ -599,6 +654,7 @@ ntlm2_txt=str_dup(line+25); else if(isprefix(line, "Content-Length: ")) content_length=atol(line+16); + str_free(line); } while(*line); if(!ntlm2_txt) { /* no Proxy-Authenticate: NTLM header */ s_log(LOG_ERR, "Proxy-Authenticate: NTLM header not found"); Only in stunnel-4.54.p/src: protocol.c.orig diff -ru stunnel-4.54/src/stunnel.c stunnel-4.54.p/src/stunnel.c --- stunnel-4.54/src/stunnel.c 2012-08-18 14:11:53.000000000 -0700 +++ stunnel-4.54.p/src/stunnel.c 2013-01-29 16:26:00.000000000 -0800 @@ -119,12 +119,16 @@ fatal("Could not open /dev/null"); #endif /* standard Unix */ main_initialize(); - if(main_configure(argc>1 ? argv[1] : NULL, argc>2 ? argv[2] : NULL)) + if(main_configure(argc>1 ? argv[1] : NULL, argc>2 ? argv[2] : NULL)) { + close(fd); return 1; + } if(service_options.next) { /* there are service sections -> daemon mode */ #if !defined(__vms) && !defined(USE_OS2) - if(daemonize(fd)) + if(daemonize(fd)) { + close(fd); return 1; + } close(fd); /* create_pid() must be called after drop_privileges() * or it won't be possible to remove the file on exit */ Only in stunnel-4.54.p/src: stunnel.c.orig

3 4

X509 certificate info extract and use
by Pierre-Yves Bonnetain 03 Feb '13

03 Feb '13

Hello, We're looking for a way to add some kind of cross-control between an application and the TLS tunnelling tool that protects the data. I'll give an example, that may be easier to understand. My BigDatabase has it's login/password authentication process. Since my customers want to access the database through bad Internet, we set up a SSL/TLS frontend. Each customer has his own X509 certificate, with all proper bells and jingles in it. The frontend checks the certificate (CA sig, validity, revocation, etc.) and then, as it should, passes the unencrypted flow to the application. There is no way (or, rather, we have not found any way) to cross-check that the certificate AND the requested, application-level login, are linked together. This means that my evil neighbour, which bribed my gullible cat to get my login and password, could connect to my account (app-level auth) using his X509 cert (TLS tunnel auth). We would like to perform this cross-check between X509 certificate AND application-level auth. >From our point of view, this means that we need to "extract and send" some parts of the certificate (DN, validity dates, etc.) to some secondary tool/proxy. This one will check if the data is coherent wrt application credentials. M. Henrik Riomar sent a patch (http://www.stunnel.org/pipermail/stunnel-users/2012-October/003909.html) on the list last october that is one step closer to what we are looking for. We could build from it. Maybe some of you have already solved this kind of problem, or know of a tool that answer to this kind of needs ? Tia, -- Pierre-Yves Bonnetain-Nesterenko B&A Consultants - Sécurité informatique - www.ba-consultants.fr Tel. : +33 (0) 563 277 241 - Fax : +33 (0) 567 737 829

2 5

inetd mode endpoint count check
by Michael Weiser 03 Feb '13

03 Feb '13

Hello, a client setup such as this: client = yes foreground = yes connect = example.com:80 exec = cat execargs = cat causes stunnel-4.54 to fail with error: Service [stunnel]: Inetd mode must define one endpoint The attached patch fixes the problem for me. Dunno if the endpoint check is too lax for other cases then, though. -- Thanks, Micha

2 1

transparent proxy ssl for a socket server
by Alex Needham 29 Jan '13

29 Jan '13

Hi I have to figure out how to get some ssl encapsulation for an application we have that only servs on obscure ports, the app needs to retain the source ip adress of the client requests. So i looked at stunnel, its working great in transparent mode where the stunnel server is the default gateway of the socket server, but I would like to get the stunnel server onto the same machine as the socket server and keep the client src ip. Testing with a apache as a backend as its easy to test. running centos 6.3 (2.6.32-279.19.1.el6.x86_64), updated an hour ago, built stunnel 4.54 from src.rpm. The players stunnel-boxen external=192.168.0.1, internal=192.168.1.1 web/socket-boxen internal=192.168.1.11, dg=192.168.1.1 The configs Config A - works ok debug = 7 foreground = yes #not chrooted runnnig as root no setuid,setguid [socket-1234] cert=blarg.crt key=blarg.key accept = 192.168.0.1:1234 connect = 192.168.1.11:80 transparent = source Config B - Not so good connect = 192.168.1.1:80 <- inside interface of stunnel box iptables -t mangle -N DIVERT iptables -t mangle -A PREROUTING -p tcp -m socket -j DIVERT iptables -t mangle -A DIVERT -j MARK --set-mark 1 iptables -t mangle -A DIVERT -j ACCEPT ip rule add fwmark 1 lookup 100 ip route add local 0.0.0.0/0 dev lo table 100 /etc/sysctl.conf no route filtering and forwarding is on am i trying something impossible? or am i missing something? Any help greatly appreciated, if I get this going I'll happily do a nice neater write up for others. Cheers Alex

2 1

child process reaping
by Michael Weiser 29 Jan '13

29 Jan '13

Hello, recent versions (4.47+ I think) of stunnel introduce the following code in stunnel.c: --- stunnel-4.46/src/stunnel.c 2011-11-03 10:06:59.000000000 +0100 +++ stunnel-4.54/src/stunnel.c 2012-08-18 23:11:53.000000000 +0200 [...] } else { /* inetd mode */ [...] + signal(SIGCHLD, SIG_IGN); /* ignore dead children */ + signal(SIGPIPE, SIG_IGN); /* ignore broken pipe */ + client_main(alloc_client_session(&service_options, 0, 1)); } In Linux, child processes seem to inherit their parent's SIGCHLD handler setting. This means that all of stunnel's child processes will be unable to wait for their children. This causes the following uucp-over-stunnel setup I have: CAfile = /etc/ssl/certs/cacert.pem cert = /etc/ssl/certs/suucpcert.pem key = /etc/ssl/private/suucpkey.unenc verify = 2 service = suucp exec = /usr/sbin/uucico execargs = uucico -l to fail horribly with messages such as this: uucico weiser - (2013-01-29 01:25:15.33 3676) Call complete (6 seconds 21620 bytes 35103 bps) uuxqt weiser root (2013-01-29 01:25:17.36 3677) Executing X.weiserSEQ1 (rbsmtp) uuxqt weiser root (2013-01-29 01:25:17.96 3677) ERROR: waitpid: No child processes uuxqt weiser root (2013-01-29 01:25:17.96 3677) Execution failed (X.weiserSEQ1) Restoring SIGCHLD to SIG_DFL just before execvp()'ing the child as in the attached patch seems to fix it. I also attach a small test case for reproducing. It can be run like this: nc -l -p 12345 -e "stunnel sigchldtest.conf" 127.0.0.1 & openssl s_client -quiet -verify 0 -connect 127.0.0.1:12345 and should produce the following output: child: 2654 child 2654 died When automatic child reaping it active it will fail like this: child: 2538 waitpid: No child processes BTW: On Mac OS X, the SIGCHLD handler setting does not seem to be inherited by children. -- Thanks, Micha

1 0

MATCH CERT AGAINST LDAP
by Alejandro Fernandez 26 Jan '13

26 Jan '13

Hi there! I would like to know if it's possible with stunnel, as is, to match a client certificate against a certstore in a directory service, instead of a file, so to be able to revoke from a service such as Fedora 389 some access. Please, understand that the idea is not to access the LDAP itself, but to access some service within a network and grant such access based on a directory service query. Thanks everyone, Alejandro

1 0

Re: [stunnel-users] Stunnel setup for SSL connection with POP3 server
by Ludolf Holzheid 25 Jan '13

25 Jan '13

On Thu, 2013-01-24 21:09:13 +0530, shanmuganathan sedukumar wrote: > > Hi Ludolf, > Thanks for your input. I will try the same :) Hello Shanmuganathan, always reply to the list, so others are able to follow (and to comment). > One more clarification, we have multiple mail accounts configured in the same POP3 server. In our application, for each email account the username/password credentials would vary. So, in stunnel config file do we need to specify the credentials with parameters? If so, how do we need to specify the credentials for all the accounts? As far as I understood, stunnel has nothing to do with the POP3 authentication. It merely provides with an (encrypted) transport layer for the (plain text) POP3 session. I.e., you have to specify the credentials in your application. HTH, Ludolf -- Bihl+Wiedemann GmbH Floßwörthstr. 41 68199 Mannheim, Germany Tel: +49 621 33996-0 Fax: +49 621 3392239 e-mail: lholzheid(a)bihl-wiedemann.de website: www.bihl-wiedemann.de Sitz der Gesellschaft: Mannheim Geschäftsführer: Jochen Bihl, Bernhard Wiedemann Amtsgericht Mannheim HRB 5796

1 0