- stunnel-users - stunnel.org

Re: [stunnel-users] Handshake failure
by RUTSCHLE Yves 26 Apr '07

26 Apr '07

Michal Trojnara wrote: >Some systems require to reset signal handler each time a signal was >received, while for others the handler is executed recursively destroying >CPU stack of running stunnel process. Ah. That'd explain it. Thanks for the tip and the explanations! Y.

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Handshake failure
by RUTSCHLE Yves 26 Apr '07

26 Apr '07

Hello, I am trying to set up a stunnel between two machines running LynxOS, which is a POSIX derivative. I've compiled OpenSSL 0.9.8e, and stunnel 4.20: stunnel 4.20 on i386-unknown-lynxos with OpenSSL 0.9.8e 23 Feb 2007 Threading:FORK SSL:ENGINE Sockets:POLL,IPv4 [...] I use the following config files: ////// server side debug=7 foreground=yes pid= CAfile=valid_certs key=privkey.pem cert=cert.pem verify=1 [SSLTunnel] accept=1235 connect=1234 ////// end server side ////// client side debug=7 foreground=yes pid= CAfile=valid_certs key=privkey.pem cert=cert.pem verify=1 client=yes [SSLTunnel] accept=4234 connect=173.16.1.10:1235 ////// end client side (It's run from different directories so the PEM files are different) After running both stunnels, I connect to the client side and see a beginning of handshake; however, it then breaks down: from afar, it looks like the client doesn't take the server certificate: ///// server trace 2007.04.25 15:33:22 LOG7[58:0]: Snagged 64 random bytes from /home/st07815/.rnd 2007.04.25 15:33:22 LOG7[58:0]: Wrote 1024 new random bytes to /home/st07815/.rnd 2007.04.25 15:33:22 LOG7[58:0]: RAND_status claims sufficient entropy for the PRNG 2007.04.25 15:33:22 LOG7[58:0]: PRNG seeded successfully 2007.04.25 15:33:22 LOG7[58:0]: Certificate: cert.pem 2007.04.25 15:33:22 LOG7[58:0]: Certificate loaded 2007.04.25 15:33:22 LOG7[58:0]: Key file: privkey.pem 2007.04.25 15:33:22 LOG7[58:0]: Private key loaded 2007.04.25 15:33:22 LOG7[58:0]: Loaded verify certificates from valid_certs 2007.04.25 15:33:22 LOG7[58:0]: Loaded valid_certs revocation lookup file 2007.04.25 15:33:22 LOG7[58:0]: SSL context initialized for service SSLTunnel 2007.04.25 15:33:22 LOG5[58:0]: stunnel 4.20 on i386-unknown-lynxos with OpenSSL 0.9.8e 23 Feb 2007 2007.04.25 15:33:22 LOG5[58:0]: Threading:FORK SSL:ENGINE Sockets:POLL,IPv4 2007.04.25 15:33:22 LOG6[58:0]: file ulimit = 64 (can be changed with 'ulimit -n') 2007.04.25 15:33:22 LOG6[58:0]: poll() used - no FD_SETSIZE limit for file descriptors 2007.04.25 15:33:22 LOG5[58:0]: 29 clients allowed 2007.04.25 15:33:22 LOG7[58:0]: FD 3 in non-blocking mode 2007.04.25 15:33:22 LOG7[58:0]: FD 4 in non-blocking mode 2007.04.25 15:33:22 LOG7[58:0]: FD 5 in non-blocking mode 2007.04.25 15:33:22 LOG7[58:0]: SO_REUSEADDR option set on accept socket 2007.04.25 15:33:22 LOG7[58:0]: SSLTunnel bound to 0.0.0.0:1235 2007.04.25 15:33:22 LOG7[58:0]: No pid file being created (end of init, waiting for connection) 2007.04.25 15:34:17 LOG7[58:0]: SSLTunnel accepted FD=6 from 173.16.1.7:1092 2007.04.25 15:34:17 LOG7[68:0]: SSLTunnel started 2007.04.25 15:34:17 LOG7[68:0]: FD 6 in non-blocking mode 2007.04.25 15:34:17 LOG5[68:0]: SSLTunnel accepted connection from 173.16.1.7:1092 2007.04.25 15:34:17 LOG7[68:0]: SSL state (accept): before/accept initialization 2007.04.25 15:34:17 LOG7[68:0]: SSL state (accept): SSLv3 read client hello A 2007.04.25 15:34:17 LOG7[68:0]: SSL state (accept): SSLv3 write server hello A 2007.04.25 15:34:17 LOG7[68:0]: SSL state (accept): SSLv3 write certificate A 2007.04.25 15:34:17 LOG7[68:0]: SSL state (accept): SSLv3 write certificate request A 2007.04.25 15:34:17 LOG7[68:0]: SSL state (accept): SSLv3 flush data 2007.04.25 15:34:19 LOG3[68:0]: SSL_accept: Peer suddenly disconnected 2007.04.25 15:34:19 LOG5[68:0]: Connection reset: 0 bytes sent to SSL, 0 bytes sent to socket 2007.04.25 15:34:19 LOG7[58:0]: Cleaning up the signal pipe 2007.04.25 15:34:19 LOG7[58:0]: Process 68 finished with code 0 (0 left) ///// end server trace ///// client trace 2007.04.25 15:33:59 LOG7[12:0]: Snagged 64 random bytes from /home/st07815/.rnd 2007.04.25 15:33:59 LOG7[12:0]: Wrote 1024 new random bytes to /home/st07815/.rnd 2007.04.25 15:33:59 LOG7[12:0]: RAND_status claims sufficient entropy for the PRNG 2007.04.25 15:33:59 LOG7[12:0]: PRNG seeded successfully 2007.04.25 15:33:59 LOG7[12:0]: Certificate: cert.pem 2007.04.25 15:33:59 LOG7[12:0]: Certificate loaded 2007.04.25 15:33:59 LOG7[12:0]: Key file: privkey.pem 2007.04.25 15:33:59 LOG7[12:0]: Private key loaded 2007.04.25 15:33:59 LOG7[12:0]: Loaded verify certificates from valid_certs 2007.04.25 15:33:59 LOG7[12:0]: Loaded valid_certs revocation lookup file 2007.04.25 15:33:59 LOG7[12:0]: SSL context initialized for service SSLTunnel 2007.04.25 15:33:59 LOG5[12:0]: stunnel 4.20 on i386-unknown-lynxos with OpenSSL 0.9.8e 23 Feb 2007 2007.04.25 15:33:59 LOG5[12:0]: Threading:FORK SSL:ENGINE Sockets:POLL,IPv4 2007.04.25 15:33:59 LOG6[12:0]: file ulimit = 64 (can be changed with 'ulimit -n') 2007.04.25 15:33:59 LOG6[12:0]: poll() used - no FD_SETSIZE limit for file descriptors 2007.04.25 15:33:59 LOG5[12:0]: 29 clients allowed 2007.04.25 15:33:59 LOG7[12:0]: FD 3 in non-blocking mode 2007.04.25 15:33:59 LOG7[12:0]: FD 4 in non-blocking mode 2007.04.25 15:33:59 LOG7[12:0]: FD 5 in non-blocking mode 2007.04.25 15:33:59 LOG7[12:0]: SO_REUSEADDR option set on accept socket 2007.04.25 15:33:59 LOG7[12:0]: SSLTunnel bound to 0.0.0.0:4234 2007.04.25 15:33:59 LOG7[12:0]: No pid file being created (end of init, waiting for connection) 2007.04.25 15:34:27 LOG7[12:0]: SSLTunnel accepted FD=6 from 152.14.101.54:64752 2007.04.25 15:34:27 LOG7[27:0]: SSLTunnel started 2007.04.25 15:34:27 LOG7[27:0]: FD 6 in non-blocking mode 2007.04.25 15:34:27 LOG5[27:0]: SSLTunnel accepted connection from 152.14.101.54:64752 2007.04.25 15:34:27 LOG7[27:0]: FD 5 in non-blocking mode 2007.04.25 15:34:27 LOG7[27:0]: SSLTunnel connecting 173.16.1.10:1235 2007.04.25 15:34:27 LOG7[27:0]: connect_wait: waiting 10 seconds 2007.04.25 15:34:27 LOG7[27:0]: connect_wait: connected 2007.04.25 15:34:27 LOG5[27:0]: SSLTunnel connected remote server from 173.16.1.7:1092 2007.04.25 15:34:27 LOG7[27:0]: Remote FD=5 initialized 2007.04.25 15:34:27 LOG7[27:0]: SSL state (connect): before/connect initialization 2007.04.25 15:34:27 LOG7[27:0]: SSL state (connect): SSLv3 write client hello A 2007.04.25 15:34:27 LOG7[27:0]: SSL state (connect): SSLv3 read server hello A 2007.04.25 15:34:28 LOG7[12:0]: Cleaning up the signal pipe 2007.04.25 15:34:28 LOG7[12:0]: Process 27 terminated on signal 11 (0 left) ///// end client trace Now the strange thing is that this very same setup works on Solaris, so I have something wrong with the port of either OpenSSL or stunnel on LynxOS. If someone could give me a hint as to where to start poking, I'd greatly appreciate it. TIA, Y.

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Stunnel with Goldmine 6.70.61214
by Raymond Randall 26 Apr '07

26 Apr '07

Greetings! Use Goldmine with Gmail domain services. Have set up according to Mike Casteel's instructions. However, Goldmine will not download email from the Gmail (the GMail address: rayrandall(a)ethosadvisory.com) Here is the stunnel.conf file: client=yes [pop3] accept=9995 connect=pop.gmail.com:995 [smtp] accept=465 connect=smtp.gmail.com:465 POP and SMTP set to: 127.0.0.1 Here is the stunnel report: 2007.04.26 06:32:20 LOG3[1972:1996]: Error resolving 'pop.gmail.com': Neither nodename nor servname known (EAI_NONAME) Cannot resolve 'pop.gmail.com:995' - delaying DNS lookup 2007.04.26 06:32:20 LOG3[1972:1996]: Error resolving 'smtp.gmail.com': Neither nodename nor servname known (EAI_NONAME) Cannot resolve 'smtp.gmail.com:465' - delaying DNS lookup 2007.04.26 06:32:20 LOG5[1972:1996]: stunnel 4.16 on x86-pc-mingw32-gnu with OpenSSL 0.9.7e 25 Oct 2004 2007.04.26 06:32:20 LOG5[1972:1996]: Threading:WIN32 SSL:ENGINE Sockets:SELECT,IPv6 2007.04.26 06:32:24 LOG5[1972:424]: No limit detected for the number of clients 2007.04.26 07:11:56 LOG5[1972:1204]: pop3 connected from 127.0.0.1:1600 2007.04.26 07:14:01 LOG5[1972:1204]: Connection closed: 2795 bytes sent to SSL, 662451 bytes sent to socket Perhaps this is a Goldmine configuration error. Not sure, and appreciate suggestions. Ray Randall -- Ethos Advisory Services Ray Randall 617-275-5565 Fax: 877-895-3756 http://www.ethosadvisory.com Information provided by Ethos is based on sources we believe reliable. Ethos does not offer legal or accounting services. Information contained in this email message is confidential and may contain privileged information. Any review or use of the information contained in this email message by persons other than the intended recipient(s) is prohibited. Content of this email is illustrative and educational; it is not a recommendation to purchase or sell. The examples presented do not take into consideration commissions, tax implications or other transaction costs, which may significantly affect the economic consequences of a given strategy. Mutual fund investing involves risk, including the possible loss of principal. Index performance returns do not reflect any management fees, transaction costs, or expenses. Past performance does not guarantee future results.

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Connecting via rtmps to Red5 server
by David Schulberg 25 Apr '07

25 Apr '07

Hi, I have been led to stunnel as the way to get a Flash application to communicate securely with Red5 server. Red5 doesn't directly support ssl connectivity but using rtmps protocol (rtmp tunnelled via https) clients should be able to connect to Red5 if stunnel handles the encrypted traffic on port 443 and passes unencrypted communications back and forth to the Red5 on a port it expects to receive rtmp communication.. (refer http://www.adobe.com/devnet/flashcom/articles/firewalls_proxy04.html) The log file I get when I attempt to talk rtmps is shown below 2007.04.25 18:19:04 LOG7[3932:3384]: New thread created 2007.04.25 18:19:04 LOG7[3932:3664]: https started 2007.04.25 18:19:04 LOG7[3932:3664]: FD 224 in non-blocking mode 2007.04.25 18:19:04 LOG7[3932:3664]: TCP_NODELAY option set on local socket 2007.04.25 18:19:04 LOG5[3932:3664]: https accepted connection from 127.0.0.1:1249 2007.04.25 18:19:04 LOG7[3932:3664]: FD 248 in non-blocking mode 2007.04.25 18:19:04 LOG7[3932:3664]: https connecting 127.0.0.1:1935 2007.04.25 18:19:04 LOG7[3932:3664]: connect_wait: waiting 10 seconds 2007.04.25 18:19:04 LOG7[3932:3664]: connect_wait: connected 2007.04.25 18:19:04 LOG5[3932:3664]: https connected remote server from 127.0.0.1:1250 2007.04.25 18:19:04 LOG7[3932:3664]: Remote FD=248 initialized 2007.04.25 18:19:04 LOG7[3932:3664]: TCP_NODELAY option set on remote socket 2007.04.25 18:19:04 LOG7[3932:3664]: SSL state (connect): before/connect initialization 2007.04.25 18:19:04 LOG7[3932:3664]: SSL state (connect): SSLv3 write client hello A 2007.04.25 18:24:04 LOG6[3932:3664]: init_ssl: s_poll_wait timeout 2007.04.25 18:24:04 LOG5[3932:3664]: Connection reset: 0 bytes sent to SSL, 0 bytes sent to socket 2007.04.25 18:24:04 LOG7[3932:3664]: https finished (0 left) The stunnel.conf file has the following settings that pertain specifically to this situation client = yes [https] accept = 443 connect = 1935 What I seem to see (according to the logfile) is that an ssl connection is successfully established but no subsequent communication takes place after the connection has been made. At this point my Flash application doesn't send any messages via the ssl connection which seems to implicate my client as being the source of my problem. I would appreciate any advice on how I can best investigate this whole situation to resolve the issue. Regards, David Schulberg email: davids(a)evertech.com.au

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firewall very restricted!!
by Pitoniso Rikito Rikin 17 Apr '07

17 Apr '07

Ok guys look this... my only contact with the world is trought the WEB port 80 how i can establish a ssh connection trought this port, the only method avaible is the GET or POST.... well how i do this... help --------------------------------- LLama Gratis a cualquier PC del Mundo. Llamadas a fijos y móviles desde 1 céntimo por minuto. http://es.voice.yahoo.com

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Using Client Authentication
by Ravi Gowda 16 Apr '07

16 Apr '07

Hi All, I am trying to have a setup where stunnel acts as a client to a server which requires client-Authentication. This is the snapshot of my stunnel.conf # Sample stunnel configuration file # Copyright by Michal Trojnara 2002 setuid = nobody setgid = nobody output = /etc/stunnel/out cert = /etc/stunnel/rtca-client.pem key = /etc/stunnel/rtca-client.ky # Authentication stuff verify = 2 # don't forget about c_rehash CApath # it is located inside chroot jail: #CApath = /certs # or simply use CAfile instead: CAfile = /etc/stunnel/rtca.pem ciphers = DHE-RSA-AES256-SHA:DHE-DSS-AES256-SHA:AES256-SHA:EDH-RSA-DES-CBC3-SHA:EDH-DSS-DES-CBC3-SHA:DES-CBC3-SHA:DES-CBC3-MD5:DHE-RSA-AES128-SHA:DHE-DSS-AES128-SHA:AES128-SHA:IDEA-CBC-SHA:IDEA-CBC-MD5:RC2-CBC-MD5:DHE-DSS-RC4-SHA:RC4-SHA:RC4-MD5:RC4-MD5:RC4-64-MD5:EXP1024-DHE-DSS-DES-CBC-SHA:EXP1024-DES-CBC-SHA:EXP1024-RC2-CBC-MD5:EDH-RSA-DES-CBC-SHA:EDH-DSS-DES-CBC-SHA:DES-CBC-SHA:DES-CBC-MD5:EXP1024-DHE-DSS-RC4-SHA:EXP1024-RC4-SHA:EXP1024-RC4-MD5:EXP-EDH-RSA-DES-CBC-SHA:EXP-EDH-DSS-DES-CBC-SHA:EXP-DES-CBC-SHA:EXP-RC2-CBC-MD5:EXP-RC2-CBC-MD5:EXP-RC4-MD5:EXP-RC4-MD5 # Some debugging stuff debug = 7 output = /etc/stunnel/stunnel.log # Use it for client mode client = yes when I try to connect to the server, I am seeing that Stunnel is sending an empty certificate..which is making my server to reject connections. Can someone please help me out?? Thanks in Advance Ravi Gowda

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Re: [stunnel-users] Setting up chain certificates on Stunnel.
by Hans Werner Strube 13 Apr '07

13 Apr '07

Satyajit Das wrote: > My server certificate > signed by intermediate CA > signed by Verisign CA > > I have the Verisign certificate on my clients trusted root CAs, however I am > > not able to get the SSL communication through. I believe this is because > stunnel should send all the three certificates for authentication and I > couldnt > configure stunnel to send across all the three certificates. > > Can anybody please help install all these certificates on stunnel. Simply concatenate the certificates (in PEM format) in the file specified by "cert = ..." and supply the key of your server certificate either in the same file or in the file specified by "key = ...".

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stunnel-4.20 crash on AIX
by Peter O'Gorman 12 Apr '07

12 Apr '07

Hi, We built stunnel-4.20 on solaris, hpux, aix, tru64. irix and various linux hosts, and it works fine everywhere except hpux10.20 and aix. stunnel crashes with similar backtraces on AIX-4.3,5.1,5.2 and 5.3, not on the first client connect (using stunnel client=yes, connecting to s secure daytime server on another host, because everyone needs a secure daytime server :-p) but on the second connection. We have not tried server side yet, I assume results are similar. The backtrace looks like this: GDB: Program terminated with signal 11, Segmentation fault. #0 0xd0126b1c in _sigsetmask () from /usr/lib/libpthreads.a(shr_xpg5.o) (gdb) bt #0 0xd0126b1c in _sigsetmask () from /usr/lib/libpthreads.a(shr_xpg5.o) #1 0xd0127e5c in _p_sigaction () from /usr/lib/libpthreads.a(shr_xpg5.o) #2 0xd0315544 in sigaction () from /usr/lib/libc.a(shr.o) #3 0xd038beac in signal () from /usr/lib/libc.a(shr.o) #4 0x10006200 in sigchld_handler (sig=0) at network.c:350 #5 0x00004378 in ?? () Previous frame inner to this frame (corrupt stack?) dbx: sigchld_handler(sig = 0), line 350 in "network.c" _sigsetmask(??, ??, ??) at 0xd0126b1c _p_sigaction(??, ??, ??) at 0xd0127e58 raise.sigaction(??, ??, ??) at 0xd0315540 signal(??, ??) at 0xd038bea8 sigchld_handler(sig = 0), line 350 in "network.c" _sigsetmask(??, ??, ??) at 0xd0126b1c _p_sigaction(??, ??, ??) at 0xd0127e58 raise.sigaction(??, ??, ??) at 0xd0315540 signal(??, ??) at 0xd038bea8 sigchld_handler(sig = 0), line 350 in "network.c" _sigsetmask(??, ??, ??) at 0xd0126b1c _p_sigaction(??, ??, ??) at 0xd0127e58 raise.sigaction(??, ??, ??) at 0xd0315540 signal(??, ??) at 0xd038bea8 repeated forever. Line 350 of network.c says: signal(SIGCHLD, sigchld_handler); And that is in the signal handler, it seems like a normal thing to do, and I have no idea why, on AIX, it crashes. putting an #ifndef _AIX #endif around the signal() call "fixes" the crash, alternatively setting SIGCHLD to SIG_IGN on AIX "fixes" it, but I don't think that either solution is correct. I don't believe the signal handler will get called again as we do not reset the signal. (tests that assumtion and finds answer to riddle) Okay, problem identified. The signal_handler is being called repeatedly, causing an infinite loop that can only end in a crash. According to the AIX signal man page: The signal in libc.a does not set the SA_RESTART flag. It sets the signal mask to the signal whose action is being specified, and sets flags to SA_OLDSTYLE. The Berkeley Software Distribution (BSD) version of signal sets the SA_RESTART flag and preserves the current settings of the signal mask and flags. The BSD version can be used by compiling with the Berkeley Compatibility Library (libbsd.a). And indeed, no patches are required if I add -lbsd. Another solution would probably be to use sigaction if it is available. Meanwhile, please find attached a patch to add -lbsd on aix. Thanks for bearing with me while I figured this out :-) Peter

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Setting up chain certificates on Stunnel.
by Satyajit Das 12 Apr '07

12 Apr '07

Hi , I am using stunnel as a wrapper to provide SSL functionalities for my server. Right now I am having problems setting up chained certificates on stunnel. My Problem -> My server certificate > signed by intermediate CA > signed by Verisign CA I have the Verisign certificate on my clients trusted root CAs, however I am not able to get the SSL communication through. I believe this is because stunnel should send all the three certificates for authentication and I couldnt configure stunnel to send across all the three certificates. Can anybody please help install all these certificates on stunnel. Thanks in advance, Satyajit

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Cannot install stunnel as a service on Vista
by Neil Aggarwal 12 Apr '07

12 Apr '07

Hello: I cannot install stunnel as a service on Vista. I get a permission denied error. Is there a way to work around it? Thanks, Neil -- Neil Aggarwal, (214)986-3533, www.JAMMConsulting.com FREE! Eliminate junk email and reclaim your inbox. Visit http://www.spammilter.com for details.

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