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seg fault stunnel 4-14 on SLES10
by Jon Howse 22 Sep '06

22 Sep '06

Hi, I am getting a seg fault with stunnel on an installation of SLES10. This is the first SLES10 server I have set up after having set up many SLES9 servers (approx twelve) which all communicate through stunnel to a central syslog server. The version of stunnel we are using on SLES9 is: stunnel-4.05-20.1. The other machines are a mix of 32bit and 64bit Xeons. The seg fault seems to happen when syslog starts to talk through stunnel. The program is a binary rpm install for 64bit SLES10 and is being run in standalone mode as a client connecting to a stunnel/syslog server running SLES9. OS:- SLES10 x86_64 Packages:- Stunnel 4-14-14.2 Syslog-ng-1.6.8-20.4 Openssl-0.9.8a-18.4 uname -a: Linux server 2.6.16.21-0.15-smp #1 SMP Tue Jul 25 15:28:49 UTC 2006 x86_64 x86_64 x86_64 GNU/Linux libc version: libc.so.6 => /lib64/libc.so.6 (0x00002ae068cf2000) openssl version: OpenSSL 0.9.8a 11 Oct 2005 stunnel.conf:- # Copyright by Michal Trojnara 2002-2004 # --with changes for SuSE package # client = yes | no # client mode (remote service uses SSL) # default: no (server mode) client = yes # # chroot + user (comment out to disable) # chroot = /var/lib/stunnel/ setuid = stunnel setgid = nogroup # note about the chroot feature and the "exec" keyword to start other # services... # while the init script /etc/init.d/stunnel will copy the binaries and libraries # into the chroot jail, more files might be needed in the jail (configuration files etc.) pid = /var/run/stunnel.pid # # debugging # debug = 7 output = /var/log/stunnel.log # # Some performance tunings # # disable Nagle algorithm (a.k.a. tinygram prevention, see man 7 tcp) socket = l:TCP_NODELAY=1 socket = r:TCP_NODELAY=1 # compression = rle # Workaround for Eudora bug #options = DONT_INSERT_EMPTY_FRAGMENTS # Authentication stuff # verify = 2 # Don't forget to c_rehash CApath; CApath is located inside chroot jail: # CApath = /certs # It's often easier to use CAfile: # CAfile = /etc/stunnel/certs.pem # Don't forget to c_rehash CRLpath; CRLpath is located inside chroot jail: # CRLpath = /crls # Alternatively you can use CRLfile: # CRLfile = /etc/stunnel/crls.pem CAfile = /etc/openldap/rootcert.pem cert = /etc/ssl/certs/thorincert.pem key = /etc/ssl/certs/thorinkey.pem verify = 2 [5140] accept = 127.0.0.1:514 connect = xxx.xxx.xxx.xxx:5140 /var/log/messages:- kernel: Kernel logging (proc) stopped. Sep 21 13:51:00 thorin kernel: Kernel log daemon terminating. Sep 21 13:51:01 thorin syslog-ng[3146]: syslog-ng version 1.6.8 going down Sep 21 13:51:01 thorin syslog-ng[3769]: syslog-ng version 1.6.8 starting Sep 21 13:51:01 thorin syslog-ng[3769]: Changing permissions on special file /dev/tty10 Sep 21 13:51:01 thorin syslog-ng[3769]: Connection broken to AF_INET(127.0.0.1:514), reopening in 60 seconds Sep 21 13:51:06 thorin kernel: klogd 1.4.1, log source = /proc/kmsg started. Sep 21 13:51:06 thorin kernel: stunnel[3739]: segfault at 000000005569a9f0 rip 000055555555b793 rsp 00005555556b2f60 error 4 var/log/stunnel.log:- stunnel 4.14 on x86_64-suse-linux-gnu UCONTEXT+POLL+IPv4+LIBWRAP with OpenSSL 0.9.8a 11 Oct 2005 2006.09.21 13:48:25 LOG7[3396:1]: RAND_status claims sufficient entropy for the PRNG 2006.09.21 13:48:25 LOG6[3396:1]: PRNG seeded successfully 2006.09.21 13:48:25 LOG7[3396:1]: Certificate: /etc/ssl/certs/thorincert.pem 2006.09.21 13:48:25 LOG7[3396:1]: Key file: /etc/ssl/certs/thorinkey.pem 2006.09.21 13:48:25 LOG7[3396:1]: Loaded verify certificates from /etc/openldap/rootcert.pem 2006.09.21 13:48:25 LOG6[3396:1]: file ulimit = 1024 (can be changed with 'ulimit -n') 2006.09.21 13:48:25 LOG6[3396:1]: poll() used - no FD_SETSIZE limit for file descriptors 2006.09.21 13:48:25 LOG5[3396:1]: 500 clients allowed 2006.09.21 13:48:25 LOG7[3396:1]: FD 4 in non-blocking mode 2006.09.21 13:48:25 LOG7[3396:1]: FD 5 in non-blocking mode 2006.09.21 13:48:25 LOG7[3396:1]: FD 6 in non-blocking mode 2006.09.21 13:48:25 LOG7[3396:1]: SO_REUSEADDR option set on accept socket 2006.09.21 13:48:25 LOG7[3396:1]: 5140 bound to 127.0.0.1:514 2006.09.21 13:48:25 LOG7[3397:1]: Created pid file /var/run/stunnel.pid 2006.09.21 13:48:25 LOG7[3397:0]: Waiting -1 second(s) for 2 file descriptor(s) 2006.09.21 13:49:20 LOG7[3397:0]: CONTEXT 1, FD=4, (IN)->() 2006.09.21 13:49:20 LOG7[3397:0]: CONTEXT 1, FD=6, (IN)->(IN) 2006.09.21 13:49:20 LOG7[3397:1]: 5140 accepted FD=7 from 127.0.0.1:7323 2006.09.21 13:49:20 LOG7[3397:1]: Creating a new context 2006.09.21 13:49:20 LOG7[3397:1]: Context 2 created 2006.09.21 13:49:20 LOG7[3397:2]: Context swap: 1 -> 2 It waits at the last entry until syslog tries to connect. And that's where the useful logging stops, after that it's a seg fault. Hope you can point me in the right direction... Jon Howse ---------------------------------------------------------------------------- St Brendan's Sixth Form College --- STAFF e-mail Please consider the environment before printing this email. This e-mail is confidential and intended solely for the use of the individual to whom it is addressed. Any views or opinions presented are solely those of the author and do not necessarily represent those of St Brendan's Sixth Form College. If you are not the intended recipient, be advised that you have received this e-mail in error and that any use, dissemination, forwarding, printing, or copying of this e-mail is strictly prohibited. If you have received this e-mail in error please contact the sender. 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Would you plz help me? I have problem with defining ciphers in stunnel
by hjanzadeh＠sinamicro.com 19 Sep '06

19 Sep '06

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4.17 stunnel with syslog-ng
by Jason Englander 15 Sep '06

15 Sep '06

I have a logging server at home set up with syslog-ng and stunnel. Earlier this morning, I upgraded stunnel on a logging client machine from 4.15 to 4.17, no problems. I upgraded the server from 4.15 to 4.17 and stunnel seemed to hang (run, but not detach) on startup. Very long story short (it was too early, I hadn't had enough coffee yet <g>), stunnel was trying to log to syslog, which wasn't running yet. Putting aside that I should've been using "output = /var/log/stunnel.log" instead, for a log server of all things :-), did something change in stunnel or did I screw something up that I don't remember doing? My startup script has been starting stunnel, then syslog-ng for years. I haven't downgraded to verify that it does/doesn't happen starting with a particular version, but I might do that later today out of curiosity. (before fixing, upgrading "important" machines) Also, FYI - configure created a file named "6," in the source directory with this in it: no LIBS=-lz -ldl -lutil -lpthread -L/usr/local/ssl/lib -lssl -lcrypto This seems to be the offending line in configure: echo "${ECHO_T}no" >&6, LIBS="$saved_LIBS" -> echo "${ECHO_T}no" >&6; LIBS="$saved_LIBS" I ran 'autoreconf -f -i' (autoconf 2.60, automake 1.9.6) and the line isn't in the new ./configure any more. Jason -- Jason Englander <jason(a)englanders.cc> 394F 7E02 C105 7268 777A 3F5A 0AC0 C618 0675 80CA

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cannot compile stunnel on solaris 10 in a zone
by tomvo＠absi.be 15 Sep '06

15 Sep '06

Hi, I'm trying to compile stunnel on a solaris 10 (06/06 release) in a normal (non-global) zone. the compile fails at the mknod command. How do I install stunnel ? I could ofcourse create the device myself in the global zone, but i think it was in /usr/local/var/lib/stunnel/dev, I don't think that our user zone will have access to this device if we create it in the global zone. Anyone else struggled with the same problem ? thx, Tom. --------------------------------------------------------------------------- Tom Van Overbeke - ABSI Service Delivery Coordinator email: tomvo(a)absi.be Tel: +32 2 333 40 00 - Fax: +32 2 333 40 60 website: http://www.absi.be ---------------------------------------------------------------------------

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stunnel problem on hp-ux 11.11
by matt.miller＠accenture.com 13 Sep '06

13 Sep '06

System specs: HP-UX 11.11 Stunnel 4.15 OpenSSL 0.8.7i Config File: ; Certificate/key is needed in server mode and optional in client mode ;cert = /opt/iexpress/stunnel/etc/stunnel/mail.pem ;key = /opt/iexpress/stunnel/etc/stunnel/mail.pem ; Some security enhancements for UNIX systems - comment them out on Win32 ;chroot = /opt/iexpress/stunnel/var/lib/stunnel/ ;setuid = nobody ;setgid = nogroup ; PID is created inside chroot jail pid = /tmp/stunnel.pid ; Some performance tunings socket = l:TCP_NODELAY=1 socket = r:TCP_NODELAY=1 ;compression = rle ; Workaround for Eudora bug ;options = DONT_INSERT_EMPTY_FRAGMENTS ; Authentication stuff ;verify = 2 ; Don't forget to c_rehash CApath ; CApath is located inside chroot jail ;CApath = /certs ; It's often easier to use CAfile ;CAfile = /opt/iexpress/stunnel/etc/stunnel/certs.pem ; Don't forget to c_rehash CRLpath ; CRLpath is located inside chroot jail ;CRLpath = /crls ; Alternatively you can use CRLfile ;CRLfile = /opt/iexpress/stunnel/etc/stunnel/crls.pem ; Some debugging stuff useful for troubleshooting debug = 7 ;foreground = yes output = stunnel.log ; Service-level configuration [pop3s] ; Use it for client mode client = yes ;accept = 995 ;connect = 110 accept = localhost:110 connect = POP3S.MAILSERVER:995 ;[imaps] ;accept = 993 ;connect = 143 ;[ssmtp] ;accept = 465 ;connect = 25 ;[https] ;accept = 443 ;connect = 80 ;TIMEOUTclose = 0 ; vim:ft=dosini Problem: When I try to execute the following command "telnet localhost 110" I get an entry in the stunnel log file and I am unable to connect to the secure pop3 server. I know that this is not a firewall issue because I can telnet directly to the POP3S.MAILSERVER on port 995 and establish a connection, I also know that the server works fine because I set up stunnel on my windows xp machine and that did not have a problem establishing a connection. Any help on this issue would be great. Here is the log I am getting 2006.08.10 18:23:03 LOG5[16138:1]: stunnel 4.15 on hppa2.0w-hp-hpux11.11 with Op 2006.08.10 09:43:55 LOG5[7158:1]: 2000 clients allowed 2006.08.10 09:43:55 LOG7[7158:1]: FD 4 in non-blocking mode 2006.08.10 09:43:55 LOG7[7158:1]: FD 5 in non-blocking mode 2006.08.10 09:43:55 LOG7[7158:1]: FD 6 in non-blocking mode 2006.08.10 09:43:55 LOG7[7158:1]: SO_REUSEADDR option set on accept socket 2006.08.10 09:43:55 LOG7[7158:1]: pop3s bound to 127.0.0.1:110 2006.08.10 09:43:55 LOG7[7263:1]: Created pid file /tmp/stunnel.pid 2006.08.10 16:15:45 LOG7[7263:1]: pop3s accepted FD=0 from 127.0.0.1:57040 2006.08.10 16:15:45 LOG3[7263:1]: Connection rejected: create_client failed 2006.08.10 16:30:34 LOG7[7263:1]: pop3s accepted FD=0 from 127.0.0.1:57156 2006.08.10 16:30:34 LOG3[7263:1]: Connection rejected: create_client failed 2006.08.10 16:45:34 LOG7[7263:1]: pop3s accepted FD=0 from 127.0.0.1:57275 2006.08.10 16:45:34 LOG3[7263:1]: Connection rejected: create_client failed 2006.08.10 17:00:36 LOG7[7263:1]: pop3s accepted FD=0 from 127.0.0.1:57401 2006.08.10 17:00:36 LOG3[7263:1]: Connection rejected: create_client failed 2006.08.10 17:15:36 LOG7[7263:1]: pop3s accepted FD=0 from 127.0.0.1:57506 2006.08.10 17:15:36 LOG3[7263:1]: Connection rejected: create_client failed 2006.08.10 17:30:35 LOG7[7263:1]: pop3s accepted FD=0 from 127.0.0.1:57614 2006.08.10 17:30:35 LOG3[7263:1]: Connection rejected: create_client failed Matt T. Miller Accenture Minneapolis, MN USA 612-277-1826 aim: mttmiller8 email: matt.miller(a)accenture.com This message is for the designated recipient only and may contain privileged, proprietary, or otherwise private information. If you have received it in error, please notify the sender immediately and delete the original. Any other use of the email by you is prohibited.

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RE: [stunnel-users] stunnel and AJP
by Jones Scott - sjones 13 Sep '06

13 Sep '06

Any chance you could send me a sample configuration file? :) Just got it install and going to start trying to get it setup. I am going to try to end the tunnel on a BigIP box. So just set it up on the apache server and hope it can end on the BigIP box. Thanks -----Original Message----- From: Richard.Hall [mailto:Richard.Hall@ingenta.com] Sent: Friday, August 25, 2006 4:08 PM To: Jones Scott - sjones Cc: stunnel-users(a)mirt.net Subject: Re: [stunnel-users] stunnel and AJP Jason, On Fri, 25 Aug 2006, Jones Scott - sjones wrote: > Has anyone used stunnel to secure AJP traffic from apache to jboss Short answer: Yes. - Apache + mod_jk configured to talk to stunnel client on localhost rather than to JBoss AJP13 port - stunnel client talks to remote stunnel server - stunnel server talks to JBoss AJP13 port on _its_ localhost. Works a treat :-) We've even done it with a third machine in the middle, running an stunnel server and client back-to-back. Just don't ask why! HTH, Richard ************************************************************************* The information contained in this communication is confidential, is intended only for the use of the recipient named above, and may be legally privileged. If the reader of this message is not the intended recipient, you are hereby notified that any dissemination, distribution or copying of this communication is strictly prohibited. If you have received this communication in error, please resend this communication to the sender and delete the original message or any copy of it from your computer system. Thank you. *************************************************************************

2 1

stunnel going to BigIP ssl
by Jones Scott - sjones 13 Sep '06

13 Sep '06

Has anyone used stunnel to end at a BipIP to decode the ssl traffic? If so, any issues or concerns? Thanks *************************************************************************** The information contained in this communication is confidential, is intended only for the use of the recipient named above, and may be legally privileged. If the reader of this message is not the intended recipient, you are hereby notified that any dissemination, distribution or copying of this communication is strictly prohibited. If you have received this communication in error, please resend this communication to the sender and delete the original message or any copy of it from your computer system. Thank You. ****************************************************************************

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"SSL_read returned WANT_READ: retrying" at 30Hz
by Vincent Lascaux 12 Sep '06

12 Sep '06

Hi, I'm trying to use rsync (2.6.8) through STunnel (4.16) to synchronize two PC over the internet (they both have the same version of stunnel and rsync). On the server, I have STunnel running with this configuration: cert = stunnel.pem ; Some performance tunings socket = l:TCP_NODELAY=0 socket = r:TCP_NODELAY=0 ; Some debugging stuff useful for troubleshooting debug = 7 output = stunnel.log [rsync] accept = 273 connect = 873 On the client I have this configuration: cert = stunnel.pem ; Some performance tunings socket = l:TCP_NODELAY=0 socket = r:TCP_NODELAY=0 ; Some debugging stuff useful for troubleshooting debug = 7 output = stunnel.log client = yes [rsync] accept = 873 connect = UrlOfMyServer:273 Then I connect with rsync using rsync -a -h --progress --stats --partial Account@localhost::RemotePath LocalPath I think the connection is not really stable. RSync sometimes hang. The log file on the client side show 2006.09.11 21:33:11 LOG7[2008:1468]: SSL_read returned WANT_READ: retrying at 30Hz (that's right, it means 30 times a second). My log file nearly gets bigger faster than my downloaded file ;) Is it expected? What does this line mean? I turned TCP_NODELAY to 0 thinking that it my give me synchronous sockets and that it would remove that error, but it didn't... Any help appreciated, Thanks -- Vincent

2 3

Stunnel 4.17 released
by Michal Trojnara 10 Sep '06

10 Sep '06

This is a bugfix release. Upgrade is recommended. Version 4.17, 2006.09.10, urgency: MEDIUM: * New features - Win32 DLLs for OpenSSL 0.9.8c. * Bugfixes - Problem with detecting getaddrinfo() in ./configure fixed. - Compilation problem due to misplaced #endif in ssl.c fixed. - Duplicate 220 in smtp_server() function in protocol.c fixed. - Minor os2.mak update. - Minor update of safestring()/safename() macros. sha1sum for stunnel-4.17.tar.gz file: 7a0ea800935e798bf938756000b57d002a99c280 Homepage and download: http://stunnel.mirt.net/ Best regards, Mike

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Multiple HTTPS endpoints
by Andrew Culross 07 Sep '06

07 Sep '06

Can I use stunnel to connect mutiple https endpoints? I'm wondering if a config file like the below would work: [https] accept = 9876 connect = xxx.xxx.xxx.xxx:443 [https] accept = 9875 connect =yyy.yyy.yyy.yyy:443 Thanks in advance ! Andrew Culross TwoFour Systems (914) 220-8849 www.TwoFour.Com The views and opinions expressed in this e-mail message are the sender's own and do not necessarily represent the views and opinions of {TwoFour Systems, LLC or F-O-R Software, LLC}

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