- stunnel-users - stunnel.org

server refuses connection by STARTTLS
by Tsurutani Naoki 10 Jan '10

10 Jan '10

Hi, I want to connect to SMTP server by STARTTLS, from MUA who does not support STARTTLS. However, I cannot connect to the server with recent stunnel. On Windows XP, my stunnel.conf is the following: client=yes debug=notice output=C:\logs\stunnel.log service=stunnel [smtp_server] accept=127.0.0.1:10025 connect=smtp.example.com:587 protocol=smtp stunnel version 4.27 or 4.29 is started as service, by "C:\Network\stunnel\stunnel.exe" -service -install c:\home\turutani\INI\stunnel.conf I cannot connect with OpenSSL distributed via stunnel. Then I changed the OpenSSL DLL, and found that I can connect with OpenSSL older than 0.9.8i, while that newer than 0.9.8j fails. But it works by adding "sslVersion=all" or "sslVersion=SSLv2" to configuration file. I also ran stunnel on FreeBSD, and found the same result about SSL version. Here is a debug level log, with no "sslVersion=" or "sslVersion=SSLv3": 2010.01.08 09:50:06 LOG7[2372:3760]: RAND_status claims sufficient entropy for the PRNG 2010.01.08 09:50:06 LOG7[2372:3760]: PRNG seeded successfully 2010.01.08 09:50:06 LOG7[2372:3760]: SSL context initialized for service smtp_server 2010.01.08 09:50:06 LOG5[2372:3760]: stunnel 4.28 on x86-pc-mingw32-gnu with OpenSSL 0.9.8l 5 Nov 2009 2010.01.08 09:50:06 LOG5[2372:3760]: Threading:WIN32 SSL:ENGINE Sockets:SELECT,IPv6 2010.01.08 09:50:06 LOG5[2372:2252]: No limit detected for the number of clients 2010.01.08 09:50:06 LOG7[2372:2252]: FD 236 in non-blocking mode 2010.01.08 09:50:06 LOG7[2372:2252]: SO_REUSEADDR option set on accept socket 2010.01.08 09:50:06 LOG7[2372:2252]: smtp_server bound to 127.0.0.1:10025 2010.01.08 09:50:34 LOG7[2372:2252]: smtp_server accepted FD=244 from 127.0.0.1:1953 2010.01.08 09:50:34 LOG7[2372:2252]: Creating a new thread 2010.01.08 09:50:34 LOG7[2372:2252]: New thread created 2010.01.08 09:50:34 LOG7[2372:1036]: smtp_server started 2010.01.08 09:50:34 LOG7[2372:1036]: FD 244 in non-blocking mode 2010.01.08 09:50:34 LOG5[2372:1036]: smtp_server accepted connection from 127.0.0.1:1953 2010.01.08 09:50:34 LOG7[2372:1036]: FD 268 in non-blocking mode 2010.01.08 09:50:34 LOG6[2372:1036]: connect_blocking: connecting 133.x.y.z:587 2010.01.08 09:50:34 LOG7[2372:1036]: connect_blocking: s_poll_wait 133.x.y.z:587: waiting 10 seconds 2010.01.08 09:50:34 LOG5[2372:1036]: connect_blocking: connected 133.x.y.z:587 2010.01.08 09:50:34 LOG5[2372:1036]: smtp_server connected remote server from 192.168.3.118:1954 2010.01.08 09:50:34 LOG7[2372:1036]: Remote FD=268 initialized 2010.01.08 09:50:34 LOG5[2372:1036]: Negotiations for smtp (client side) started 2010.01.08 09:50:37 LOG7[2372:1036]: <- 220 smtp.example.com ESMTP Postfix 2010.01.08 09:50:37 LOG7[2372:1036]: -> 220 smtp.example.com ESMTP Postfix 2010.01.08 09:50:37 LOG7[2372:1036]: -> EHLO localhost 2010.01.08 09:50:37 LOG7[2372:1036]: <- 250-smtp.example.com 2010.01.08 09:50:37 LOG7[2372:1036]: <- 250-PIPELINING 2010.01.08 09:50:37 LOG7[2372:1036]: <- 250-SIZE 51200000 2010.01.08 09:50:37 LOG7[2372:1036]: <- 250-VRFY 2010.01.08 09:50:37 LOG7[2372:1036]: <- 250-ETRN 2010.01.08 09:50:37 LOG7[2372:1036]: <- 250-STARTTLS 2010.01.08 09:50:37 LOG7[2372:1036]: <- 250 8BITMIME 2010.01.08 09:50:37 LOG7[2372:1036]: -> STARTTLS 2010.01.08 09:50:37 LOG7[2372:1036]: <- 220 Ready to start TLS 2010.01.08 09:50:37 LOG5[2372:1036]: Protocol negotiations succeeded 2010.01.08 09:50:37 LOG7[2372:1036]: SSL state (connect): before/connect initialization 2010.01.08 09:50:37 LOG7[2372:1036]: SSL state (connect): SSLv3 write client hello A 2010.01.08 09:50:40 LOG3[2372:1036]: SSL_connect: Peer suddenly disconnected 2010.01.08 09:50:40 LOG5[2372:1036]: Connection reset: 0 bytes sent to SSL, 0 bytes sent to socket 2010.01.08 09:50:40 LOG7[2372:1036]: smtp_server finished (0 left) with "sslVersion=all", 2010.01.08 09:45:33 LOG7[2664:3880]: RAND_status claims sufficient entropy for the PRNG 2010.01.08 09:45:33 LOG7[2664:3880]: PRNG seeded successfully 2010.01.08 09:45:34 LOG7[2664:3880]: SSL context initialized for service smtp_server 2010.01.08 09:45:34 LOG5[2664:3880]: stunnel 4.28 on x86-pc-mingw32-gnu with OpenSSL 0.9.8l 5 Nov 2009 2010.01.08 09:45:34 LOG5[2664:3880]: Threading:WIN32 SSL:ENGINE Sockets:SELECT,IPv6 2010.01.08 09:45:34 LOG5[2664:2408]: No limit detected for the number of clients 2010.01.08 09:45:34 LOG7[2664:2408]: FD 236 in non-blocking mode 2010.01.08 09:45:34 LOG7[2664:2408]: SO_REUSEADDR option set on accept socket 2010.01.08 09:45:34 LOG7[2664:2408]: smtp_server bound to 127.0.0.1:10025 2010.01.08 09:46:05 LOG7[2664:2408]: smtp_server accepted FD=244 from 127.0.0.1:1944 2010.01.08 09:46:05 LOG7[2664:2408]: Creating a new thread 2010.01.08 09:46:05 LOG7[2664:2408]: New thread created 2010.01.08 09:46:05 LOG7[2664:2968]: smtp_server started 2010.01.08 09:46:05 LOG7[2664:2968]: FD 244 in non-blocking mode 2010.01.08 09:46:05 LOG5[2664:2968]: smtp_server accepted connection from 127.0.0.1:1944 2010.01.08 09:46:05 LOG7[2664:2968]: FD 268 in non-blocking mode 2010.01.08 09:46:05 LOG6[2664:2968]: connect_blocking: connecting 133.x.y.z:587 2010.01.08 09:46:05 LOG7[2664:2968]: connect_blocking: s_poll_wait 133.x.y.z:587: waiting 10 seconds 2010.01.08 09:46:05 LOG5[2664:2968]: connect_blocking: connected 133.x.y.z:587 2010.01.08 09:46:05 LOG5[2664:2968]: smtp_server connected remote server from 192.168.3.118:1945 2010.01.08 09:46:05 LOG7[2664:2968]: Remote FD=268 initialized 2010.01.08 09:46:05 LOG5[2664:2968]: Negotiations for smtp (client side) started 2010.01.08 09:46:05 LOG7[2664:2968]: <- 220 smtp.example.com ESMTP Postfix 2010.01.08 09:46:05 LOG7[2664:2968]: -> 220 smtp.example.com ESMTP Postfix 2010.01.08 09:46:05 LOG7[2664:2968]: -> EHLO localhost 2010.01.08 09:46:05 LOG7[2664:2968]: <- 250-smtp.example.com 2010.01.08 09:46:05 LOG7[2664:2968]: <- 250-PIPELINING 2010.01.08 09:46:05 LOG7[2664:2968]: <- 250-SIZE 51200000 2010.01.08 09:46:05 LOG7[2664:2968]: <- 250-VRFY 2010.01.08 09:46:05 LOG7[2664:2968]: <- 250-ETRN 2010.01.08 09:46:05 LOG7[2664:2968]: <- 250-STARTTLS 2010.01.08 09:46:05 LOG7[2664:2968]: <- 250 8BITMIME 2010.01.08 09:46:05 LOG7[2664:2968]: -> STARTTLS 2010.01.08 09:46:05 LOG7[2664:2968]: <- 220 Ready to start TLS 2010.01.08 09:46:05 LOG5[2664:2968]: Protocol negotiations succeeded 2010.01.08 09:46:05 LOG7[2664:2968]: SSL state (connect): before/connect initialization 2010.01.08 09:46:05 LOG7[2664:2968]: SSL state (connect): SSLv2/v3 write client hello A 2010.01.08 09:46:05 LOG7[2664:2968]: SSL state (connect): SSLv3 read server hello A 2010.01.08 09:46:05 LOG7[2664:2968]: SSL state (connect): SSLv3 read server certificate A 2010.01.08 09:46:05 LOG7[2664:2968]: SSL state (connect): SSLv3 read server key exchange A 2010.01.08 09:46:05 LOG7[2664:2968]: SSL state (connect): SSLv3 read server done A 2010.01.08 09:46:05 LOG7[2664:2968]: SSL state (connect): SSLv3 write client key exchange A 2010.01.08 09:46:05 LOG7[2664:2968]: SSL state (connect): SSLv3 write change cipher spec A 2010.01.08 09:46:05 LOG7[2664:2968]: SSL state (connect): SSLv3 write finished A 2010.01.08 09:46:05 LOG7[2664:2968]: SSL state (connect): SSLv3 flush data 2010.01.08 09:46:05 LOG7[2664:2968]: SSL state (connect): SSLv3 read finished A 2010.01.08 09:46:05 LOG7[2664:2968]: 1 items in the session cache 2010.01.08 09:46:05 LOG7[2664:2968]: 1 client connects (SSL_connect()) 2010.01.08 09:46:05 LOG7[2664:2968]: 1 client connects that finished 2010.01.08 09:46:05 LOG7[2664:2968]: 0 client renegotiations requested 2010.01.08 09:46:05 LOG7[2664:2968]: 0 server connects (SSL_accept()) 2010.01.08 09:46:05 LOG7[2664:2968]: 0 server connects that finished 2010.01.08 09:46:05 LOG7[2664:2968]: 0 server renegotiations requested 2010.01.08 09:46:05 LOG7[2664:2968]: 0 session cache hits 2010.01.08 09:46:05 LOG7[2664:2968]: 0 external session cache hits 2010.01.08 09:46:05 LOG7[2664:2968]: 0 session cache misses 2010.01.08 09:46:05 LOG7[2664:2968]: 0 session cache timeouts 2010.01.08 09:46:05 LOG6[2664:2968]: SSL connected: new session negotiated 2010.01.08 09:46:05 LOG6[2664:2968]: Negotiated ciphers: DHE-RSA-AES256-SHA SSLv3 Kx=DH Au=RSA Enc=AES(256) Mac=SHA1 2010.01.08 09:46:05 LOG7[2664:2968]: SSL socket closed on SSL_read 2010.01.08 09:46:05 LOG7[2664:2968]: Socket write shutdown 2010.01.08 09:46:05 LOG5[2664:2968]: Connection closed: 625 bytes sent to SSL, 286 bytes sent to socket 2010.01.08 09:46:05 LOG7[2664:2968]: smtp_server finished (0 left) 2010.01.08 09:50:06 LOG7[2372:3760]: RAND_status claims sufficient entropy for the PRNG with "sslVersion=SSLv2", 2010.01.08 09:50:50 LOG7[2692:3460]: RAND_status claims sufficient entropy for the PRNG 2010.01.08 09:50:50 LOG7[2692:3460]: PRNG seeded successfully 2010.01.08 09:50:50 LOG7[2692:3460]: SSL context initialized for service smtp_server 2010.01.08 09:50:50 LOG5[2692:3460]: stunnel 4.28 on x86-pc-mingw32-gnu with OpenSSL 0.9.8l 5 Nov 2009 2010.01.08 09:50:50 LOG5[2692:3460]: Threading:WIN32 SSL:ENGINE Sockets:SELECT,IPv6 2010.01.08 09:50:50 LOG5[2692:2496]: No limit detected for the number of clients 2010.01.08 09:50:50 LOG7[2692:2496]: FD 236 in non-blocking mode 2010.01.08 09:50:50 LOG7[2692:2496]: SO_REUSEADDR option set on accept socket 2010.01.08 09:50:50 LOG7[2692:2496]: smtp_server bound to 127.0.0.1:10025 2010.01.08 09:51:04 LOG7[2692:2496]: smtp_server accepted FD=244 from 127.0.0.1:1955 2010.01.08 09:51:04 LOG7[2692:2496]: Creating a new thread 2010.01.08 09:51:04 LOG7[2692:2496]: New thread created 2010.01.08 09:51:04 LOG7[2692:2056]: smtp_server started 2010.01.08 09:51:04 LOG7[2692:2056]: FD 244 in non-blocking mode 2010.01.08 09:51:04 LOG5[2692:2056]: smtp_server accepted connection from 127.0.0.1:1955 2010.01.08 09:51:04 LOG7[2692:2056]: FD 268 in non-blocking mode 2010.01.08 09:51:04 LOG6[2692:2056]: connect_blocking: connecting 133.x.y.z:587 2010.01.08 09:51:04 LOG7[2692:2056]: connect_blocking: s_poll_wait 133.x.y.z:587: waiting 10 seconds 2010.01.08 09:51:04 LOG5[2692:2056]: connect_blocking: connected 133.x.y.z:587 2010.01.08 09:51:04 LOG5[2692:2056]: smtp_server connected remote server from 192.168.3.118:1956 2010.01.08 09:51:04 LOG7[2692:2056]: Remote FD=268 initialized 2010.01.08 09:51:04 LOG5[2692:2056]: Negotiations for smtp (client side) started 2010.01.08 09:51:04 LOG7[2692:2056]: <- 220 smtp.example.com ESMTP Postfix 2010.01.08 09:51:04 LOG7[2692:2056]: -> 220 smtp.example.com ESMTP Postfix 2010.01.08 09:51:04 LOG7[2692:2056]: -> EHLO localhost 2010.01.08 09:51:04 LOG7[2692:2056]: <- 250-smtp.example.com 2010.01.08 09:51:04 LOG7[2692:2056]: <- 250-PIPELINING 2010.01.08 09:51:04 LOG7[2692:2056]: <- 250-SIZE 51200000 2010.01.08 09:51:04 LOG7[2692:2056]: <- 250-VRFY 2010.01.08 09:51:04 LOG7[2692:2056]: <- 250-ETRN 2010.01.08 09:51:04 LOG7[2692:2056]: <- 250-STARTTLS 2010.01.08 09:51:04 LOG7[2692:2056]: <- 250 8BITMIME 2010.01.08 09:51:04 LOG7[2692:2056]: -> STARTTLS 2010.01.08 09:51:04 LOG7[2692:2056]: <- 220 Ready to start TLS 2010.01.08 09:51:04 LOG5[2692:2056]: Protocol negotiations succeeded 2010.01.08 09:51:04 LOG7[2692:2056]: SSL state (connect): before/connect initialization 2010.01.08 09:51:04 LOG7[2692:2056]: SSL state (connect): SSLv2 write client hello A 2010.01.08 09:51:04 LOG7[2692:2056]: SSL state (connect): SSLv2 read server hello A 2010.01.08 09:51:04 LOG7[2692:2056]: SSL state (connect): SSLv2 write client master key A 2010.01.08 09:51:04 LOG7[2692:2056]: SSL state (connect): SSLv2 client start encryption 2010.01.08 09:51:04 LOG7[2692:2056]: SSL state (connect): SSLv2 write client finished A 2010.01.08 09:51:04 LOG7[2692:2056]: SSL state (connect): SSLv2 read server verify A 2010.01.08 09:51:04 LOG7[2692:2056]: SSL state (connect): SSLv2 read server finished A 2010.01.08 09:51:04 LOG7[2692:2056]: 1 items in the session cache 2010.01.08 09:51:04 LOG7[2692:2056]: 1 client connects (SSL_connect()) 2010.01.08 09:51:04 LOG7[2692:2056]: 1 client connects that finished 2010.01.08 09:51:04 LOG7[2692:2056]: 0 client renegotiations requested 2010.01.08 09:51:04 LOG7[2692:2056]: 0 server connects (SSL_accept()) 2010.01.08 09:51:04 LOG7[2692:2056]: 0 server connects that finished 2010.01.08 09:51:04 LOG7[2692:2056]: 0 server renegotiations requested 2010.01.08 09:51:04 LOG7[2692:2056]: 0 session cache hits 2010.01.08 09:51:04 LOG7[2692:2056]: 0 external session cache hits 2010.01.08 09:51:04 LOG7[2692:2056]: 0 session cache misses 2010.01.08 09:51:04 LOG7[2692:2056]: 0 session cache timeouts 2010.01.08 09:51:04 LOG6[2692:2056]: SSL connected: new session negotiated 2010.01.08 09:51:04 LOG6[2692:2056]: Negotiated ciphers: DES-CBC3-MD5 SSLv2 Kx=RSA Au=RSA Enc=3DES(168) Mac=MD5 2010.01.08 09:51:04 LOG7[2692:2056]: SSL closed on SSL_read 2010.01.08 09:51:04 LOG7[2692:2056]: Socket write shutdown 2010.01.08 09:51:04 LOG7[2692:2056]: Socket closed on read 2010.01.08 09:51:04 LOG7[2692:2056]: SSL write shutdown 2010.01.08 09:51:04 LOG5[2692:2056]: Connection closed: 626 bytes sent to SSL, 286 bytes sent to socket 2010.01.08 09:51:04 LOG7[2692:2056]: smtp_server finished (0 left) However, with OpenSSL older than 0.9.8i it can connect without "sslVersion=all" or with "sslVersion=SSLv3", and log tells SSLv3 was used. Why stunnel cannot connect with OpenSSL newer than 0.9.8j ? --- Tsurutani Naoki turutani(a)scphys.kyoto-u.ac.jp

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Re: [stunnel-users] https not working with debug level 4,5,6,7
by ankur.agarwal＠wipro.com 07 Jan '10

07 Jan '10

Hi, When debug level is set to 4 , 5 , 6 , 7,https connection is not working.we have environment where we run the stunnel on a unit and try conncting it from windows machine through https connection.But this connection is not working for any debug level >3.can anybody help me.my sample stunnel file is : ; Sample stunnel configuration file by Michal Trojnara 2003-2006 ; Some options used here may not be adequate for your particular configuration ; Certificate/key is needed in server mode and optional in client mode ; The default certificate is provided only for testing and should not ; be used in a production environment cert = /usr/local/etc/config/certs/cert.pem key = /usr/local/etc/config/certs/privkey.pem ; Some performance tunings ;socket = l:TCP_NODELAY=1 ;socket = r:TCP_NODELAY=1 ; Workaround for Eudora bug ;options = DONT_INSERT_EMPTY_FRAGMENTS ; Authentication stuff verify = 1 ; Don't forget to c_rehash CApath CApath = /usr/local/etc/config/certs ; It's often easier to use CAfile ;CAfile = certs.pem ; Don't forget to c_rehash CRLpath ;CRLpath = crls ; Alternatively you can use CRLfile ;CRLfile = crls.pem ; Some debugging stuff useful for troubleshooting debug = 7 output = /tmp/stunnel.log ; Use it for client mode client = no ; Service-level configuration ; [pop3s] ; accept = 995 ; connect = 110 ; [imaps] ; accept = 993 ; connect = 143 ; [ssmtp] ; accept = 465 ; connect = 25 ;[https] accept = 443 connect = 80 TIMEOUTclose = 10 ; vim:ft=dosini Please do not print this email unless it is absolutely necessary. The information contained in this electronic message and any attachments to this message are intended for the exclusive use of the addressee(s) and may contain proprietary, confidential or privileged information. If you are not the intended recipient, you should not disseminate, distribute or copy this e-mail. Please notify the sender immediately and destroy all copies of this message and any attachments. WARNING: Computer viruses can be transmitted via email. The recipient should check this email and any attachments for the presence of viruses. The company accepts no liability for any damage caused by any virus transmitted by this email. www.wipro.com

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Previous Post Please Disregard!
by johnnyb mee 03 Jan '10

03 Jan '10

I finally seem to have stunnel up ,and running with Agent ver 2.0 newsreader. I had to do some more research on this, and thru patience, and many config changes I believe stunnel is now supplying SSL for my agent newsreader. Not an easy task for a total windows dummy like me though. Never have got the Linux thing. I guess it is the having to deal with scripts issue continually that scares the hell out of me!! IF anyone needs the procedure in the future for this let me know and I will send it to them! jb

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How to setup forte agent to work with stunnel latest version.
by johnnyb mee 03 Jan '10

03 Jan '10

I have been trying to get stunnel to work with Agent 2.0 newsreader so that I can use SSL from my news server. I have read the faq and gone thru alot of previous posts concerning this and found this one entry suggestion for the stunnel.config file in order to setup SSL to work with Agent which unfortunately has no SSL capabilities at all. It is suggested to use this entry to get both the newserver and client to work thru using stunnel as a proxy server service basically. c:\program files\stunnel -c -d 127.0.0.1:119 -r unlimited.newshosting.com:563 I copied and pasted the entry changing the usenet server to the above, and now I can no longer get stunnel to start at all. I am getting an error message stating I need to check the logfile to determine what is causing the error. The actual logfile error is as follows: 2010.01.02 23:12:59 LOG7[3456:1988]: RAND_status claims sufficient entropy for the PRNG 2010.01.02 23:12:59 LOG7[3456:1988]: PRNG seeded successfully 2010.01.02 23:12:59 LOG7[3456:1988]: Certificate: stunnel.pem 2010.01.02 23:12:59 LOG7[3456:1988]: Certificate loaded 2010.01.02 23:12:59 LOG7[3456:1988]: Key file: stunnel.pem 2010.01.02 23:12:59 LOG7[3456:1988]: Private key loaded 2010.01.02 23:12:59 LOG7[3456:1988]: SSL context initialized for service pop3s 2010.01.02 23:12:59 LOG7[3456:1988]: Certificate: stunnel.pem 2010.01.02 23:12:59 LOG7[3456:1988]: Certificate loaded 2010.01.02 23:12:59 LOG7[3456:1988]: Key file: stunnel.pem 2010.01.02 23:12:59 LOG7[3456:1988]: Private key loaded 2010.01.02 23:12:59 LOG7[3456:1988]: SSL context initialized for service imaps file stunnel.conf line 55: No '=' found 2010.01.02 23:12:59 LOG3[3456:1988]: Server is down As you can ascertain I am no linux expert at all so working with startup scripts such as this is challenging to say the least. Is the entry I pasted into the config file incorrect or not pointing to the right path for the config file directory or what do you think is missing? I am using Windows XP Pro and know that the actual file for the config resides in windows/system32 folder. Any input on this would be very much appreciated and thanks in advance all. jb

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what's wrong? error=unable to get local issuer certificate
by Carsten Krüger 29 Dec '09

29 Dec '09

I think it should work, * should match homie 1. connected with "openssl s_client -connect mail.neroon.com:995", pasted cert to dreamhost.pem 2. used this -----------stunnel.conf------------- debug=7 client = yes [pop3] accept = 110 connect = homie.mail.dreamhost.com:995 verify=1 CAfile=c:\temp\dreamhost.pem -----------stunnel.conf------------- 3. connect to localost:110, got "unable to get local issuer certificate 2009.12.29 16:04:25 LOG7[3044:5700]: Snagged 64 random bytes from C:/.rnd 2009.12.29 16:04:25 LOG7[3044:5700]: Wrote 0 new random bytes to C:/.rnd 2009.12.29 16:04:25 LOG7[3044:5700]: RAND_status claims sufficient entropy for the PRNG 2009.12.29 16:04:25 LOG7[3044:5700]: PRNG seeded successfully 2009.12.29 16:04:25 LOG7[3044:5700]: Loaded verify certificates from c:\temp\dreamhost.pem 2009.12.29 16:04:25 LOG7[3044:5700]: Loaded c:\temp\dreamhost.pem revocation lookup file 2009.12.29 16:04:25 LOG7[3044:5700]: SSL context initialized for service pop3 2009.12.29 16:04:25 LOG5[3044:5700]: stunnel 4.29 on x86-pc-mingw32-gnu with OpenSSL 0.9.8l 5 Nov 2009 2009.12.29 16:04:25 LOG5[3044:5700]: Threading:WIN32 SSL:ENGINE Sockets:SELECT,IPv6 2009.12.29 16:04:25 LOG5[3044:4320]: No limit detected for the number of clients 2009.12.29 16:04:25 LOG7[3044:4320]: FD 1832 in non-blocking mode 2009.12.29 16:04:25 LOG7[3044:4320]: SO_REUSEADDR option set on accept socket 2009.12.29 16:04:25 LOG7[3044:4320]: pop3 bound to 0.0.0.0:110 2009.12.29 16:04:40 LOG7[3044:4320]: pop3 accepted FD=1808 from 127.0.0.1:3257 2009.12.29 16:04:40 LOG7[3044:4320]: Creating a new thread 2009.12.29 16:04:40 LOG7[3044:4320]: New thread created 2009.12.29 16:04:40 LOG7[3044:2340]: pop3 started 2009.12.29 16:04:40 LOG7[3044:2340]: FD 1808 in non-blocking mode 2009.12.29 16:04:40 LOG5[3044:2340]: pop3 accepted connection from 127.0.0.1:3257 2009.12.29 16:04:40 LOG7[3044:2340]: FD 1768 in non-blocking mode 2009.12.29 16:04:40 LOG6[3044:2340]: connect_blocking: connecting 208.97.132.208:995 2009.12.29 16:04:40 LOG7[3044:2340]: connect_blocking: s_poll_wait 208.97.132.208:995: waiting 10 seconds 2009.12.29 16:04:40 LOG5[3044:2340]: connect_blocking: connected 208.97.132.208:995 2009.12.29 16:04:40 LOG5[3044:2340]: pop3 connected remote server from 192.168.0.2:3258 2009.12.29 16:04:40 LOG7[3044:2340]: Remote FD=1768 initialized 2009.12.29 16:04:40 LOG7[3044:2340]: SSL state (connect): before/connect initialization 2009.12.29 16:04:40 LOG7[3044:2340]: SSL state (connect): SSLv3 write client hello A 2009.12.29 16:04:40 LOG7[3044:2340]: SSL state (connect): SSLv3 read server hello A 2009.12.29 16:04:40 LOG4[3044:2340]: VERIFY ERROR: depth=0, error=unable to get local issuer certificate: /C=US/ST=California/L=Brea/O=Dreamhost.com/OU=Security/CN=*.mail.dreamhost.com/emailAddress=support(a)dreamhost.com 2009.12.29 16:04:40 LOG7[3044:2340]: SSL alert (write): fatal: bad certificate 2009.12.29 16:04:40 LOG3[3044:2340]: SSL_connect: 14090086: error:14090086:SSL routines:SSL3_GET_SERVER_CERTIFICATE:certificate verify failed 2009.12.29 16:04:40 LOG5[3044:2340]: Connection reset: 0 bytes sent to SSL, 0 bytes sent to socket 2009.12.29 16:04:40 LOG7[3044:2340]: pop3 finished (0 left)

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Using stunnel instead of SSL API
by Vladimir Stariradev 24 Dec '09

24 Dec '09

Hi Guys, I'm working on a java mobile app (J2ME MIDP 2.0) which connects to a java server, which I created. The java mobile app is an instant messenger. I want to use stunnel to encrypt the communication between the app and the server. At the moment the server runs on my localhost on port 5555 and accepts connections from the mobile device emulator I have running on the same machine. Eventually I want to transfer the mobile app on to my mobile and use it from there. My machine is running the following versions stunnel 4.29 on x86-pc-mingw32-gnu with OpenSSL 0.9.8l on Windows 7 x64. I have not yet configured a pam or config file but I would like to continue listening on port 5555 with my own certificate (but for now any will do). Will the fact that I'm running both my server and device emulator on one machine mean that it'll bypass stunnel and I'll never know if it works or not? Should I have my mobile app use SecureConnection (SSL encrypted) class? In that case, I'd have to make the server listen for SSL connections too. That would defeat the purpose of stunnel. Help on configuration is welcome. Thanks for reading, I'm looking forward to your replies Vladimir

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privileges not dropped before libwrap processes are spawned
by Micah Anderson 21 Dec '09

21 Dec '09

Hi, I recently stumbled on http://mirt.net/pipermail/stunnel-users/2008-May/001977.html which is exactly what I am seeing with version 4.27 of stunnel, namely the daemon is not switching to the setuid/setgid specified in the config before it is spawned. This means that I get 6 processes, 5 run as root with only one (albeit the one lisenting on the specified sockets) dropping privs to the specified user. The follow-up response from Mike was: I'll modify stunnel to delay spawning libwrap processes until privileges are dropped. and indeed, I find in the Changelog file for version 4.25 the following Bugfixes: * Bugfixes - Spawning libwrap processes delayed until privileges are dropped. However, it seems that either this fix either didn't make it in, or it somehow managed to creep its way back out because it is happening in 4.27. Thanks, micah

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BBwin hanging windows
by Gregory Wege 18 Dec '09

18 Dec '09

Hey Guys, We have the following problem: Bbwin is sending traffic to 2 monitoring servers and is encrypted via stunnel. If one of the monitoring servers goes down, the number of ports being used by bbwin client increases to the point where the box is unusable - no more ports available on the windows box being monitored. If we kill the bbwin process, the problem goes away temporarily - after a short period of time, the problem returns. The problem continues even after the failed hobbit server recovers, and only clears up when we kill the bbwin process. * Windows version Server 2003 * bbwin versions 0.11, 0.12 * stunnel version 4.25 * hobbit server version 4.2.2 Output of the stunnel log shows the following error: 2009.12.16 06:56:19 LOG7[2336:2460]: New thread created 2009.12.16 06:56:19 LOG7[2336:4016]: hobbit_ssl started 2009.12.16 06:56:19 LOG7[2336:4016]: FD 356 in non-blocking mode 2009.12.16 06:56:19 LOG7[2336:4016]: TCP_NODELAY option set on local socket 2009.12.16 06:56:19 LOG5[2336:4016]: hobbit_ssl accepted connection from 127.0.0.1:1725 2009.12.16 06:56:19 LOG7[2336:4016]: FD 396 in non-blocking mode 2009.12.16 06:56:19 LOG6[2336:4016]: connect_blocking: connecting 10.132.55.24:1982 2009.12.16 06:56:19 LOG3[2336:4016]: connect_blocking: connect 10.132.55.24:1982: No buffer space available (WSAENOBUFS) (10055) 2009.12.16 06:56:19 LOG5[2336:4016]: Connection reset: 0 bytes sent to SSL, 0 bytes sent to socket 2009.12.16 06:56:19 LOG7[2336:4016]: hobbit_ssl finished (0 left) Can something be added to my stunnel.conf to prevent this from happening? Any help would be greatly appreciated. Thanks.

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Hey Stunnel-Users, I forgot to mention...
by Sreejith Mohan Menon 17 Dec '09

17 Dec '09

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Tunnel iPhone - Server
by LoLoVioLo 14 Dec '09

14 Dec '09

Hi all, It is my first post. Sorry if common question but didn't find answer in archives or google. The fact is that I am using an iPhone with a data plan that only allow ports 80 and 443 (http and https). My aim is to be able to use all ports (mail, ftp, msn, etc). The idea is to tunnel all TCP connections between my computer here and my server at home. iPhone <----port-443----> Linux Server <----all-ports----> Internet I know there is alternatives for each service (webmail, webmessenger, etc.) but I think that it is technically possible to have something running that allow using of usual software. I also know that this usage is typically VPN but there is no VPN client for iPhone that allow custom ports and not sure my data plan can route GRE protocol. By the way STunnel was ported to the iPhone. There is some hope. I am not sure Stunnel is the best way to do that and not even sure that Stunnel can do it but hope you can advice. Thanks for your help. LoLoVioLo

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