stunnel-users November 2008

13 participants
15 discussions

Re: [stunnel-users] Stunnel on the same machine
by subrata＠indiatimes.com 01 Aug '11

01 Aug '11

The configuration files are : pid = /var/stunnel.pid ;chroot = /var/lib/stunnel setuid = nobody setgid = nobody foreground =yes ; Use it for client mode client = yes ; Service-level configuration [pop3s] accept = 995 connect = 110 [imaps] accept = 993 connect = 143 [ssmtp] accept = 465 connect = 25 [mysqls] accept = 3307 connect = 192.168.1.6:3307 On 192.168.1.6 ---------------------- pid = /var/stunnel.pid setuid =nobody setgid = nobody foreground = yes client = no ; Service-level configuration [pop3s] accept = 995 connect = 110 [imaps] accept = 993 connect = 143 [ssmtp] accept = 465 connect = 25 [mysqls] accept =3307 connect =3306 connecting like /usr/local/mysql/bin/mysql -h 127.0.0.1 -u root -p -P 3307 Enter password: On entring password the following lines appear : ERROR 2013 (HY000): Lost connection to MySQL server at 'reading initial communication packet', system error: 104 Subrata ----- Original Message ----- From: Brian Hatch <bri(a)stunnel.org> To: subrata(a)indiatimes.com Sent: Sun, 7 Oct 2007 10:02:17 +0530 (IST) Subject: Re: [stunnel-users] Stunnel on the same machine Near 2007-10-05 22:17 +0530, subrata(a)indiatimes.com insisted: > After starting stunnel and connecting the mysql client/usr/local/mysql/bin/mysql -h 127.0.0.1 -u root -p the flow gets stuck at the Enter password prompt any suggestions how to proceed from there. What do your stunnel configuration files look like? Other problem: mysql client may decide to use a local domain socket when connecting to localhost, thwarting your attempts to go via Stunnel. You might want to 'strace mysql ...' and look for the connect() lines. -- Brian Hatch Time flies like an Systems and arrow. Fruit flies Security Engineer like a banana. http://www.ifokr.org/bri/ Every message PGP signed -- My life has changed. What about yours? Log on to the new Indiatimes Mail and Live out of the Inbox!

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Re: [stunnel-users] rewrite Destination: when rewriting Host:
by Brian Hatch 07 Oct '09

07 Oct '09

Sometime near 2007-11-11 00:15 -0500, Marcio Marchini shouted: > Researching online one can see that WebDAV's spec requires that they > check both src and dest URLs for protocol & port. But with some proxies or > SSL fronts like stunnel, only one of the URLs is rewritten, so one goes as > http and the other as https. Here's one person explaining it, much better > than me: http://svn.haxx.se/users/archive-2006-03/0549.shtml Stunnel doesn't currently have the ability to scan and re-write the plaintext. For HTTP redirects it could possibly be implemented (re-write only the response before ^$, and redirects aren't chunked and don't have content lengths to work with, etc) but you'd still need enough HTTP logic to handle keepalives and such. It's not trivial and not likely. Another option would be to have something already HTTP aware doing the rewriting in between stunnel and subversion. A re-writing proxy. Another option would be to use mod_rewrite in apache to rewrite the urls. But the best way would be to just use SSL inside apache and drop stunnel entirely. -- Brian Hatch The best way to accelerate Systems and a Windows machine is at Security Engineer 9.8 meters per second http://www.ifokr.org/bri/ squared. Every message PGP signed

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Cannot connect to SBC/yahoo to send (or telnet)
by James Moe 05 Dec '08

05 Dec '08

-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 Hello, (I sent this yesterday but that one seems to have gotten lost....) Stunnel v4.20. When connecting to SBC/Yahoo, the session is terminated with a "bad certificate" message. See the log below. The tech folks claim all is well at their end. Is there something I am missing here? Here is the conf file: ....[ conf ].... socket = l:TCP_NODELAY=1 socket = r:TCP_NODELAY=1 client = yes output = G:/c/voice/pmmdev/testcase/bin/stunnel.log verify = 0 debug = 7 cert = g:/c/voice/pmmdev/testcase/bin/sma-test.pem [sbc] accept = localhost:6325 connect = smtp.att.yahoo.com:465 ....[ end conf ].... ....[ connection log ].... 2008.11.11 00:14:17 LOG7[223:1737]: sbc accepted FD=15 from 127.0.0.1:61053 2008.11.11 00:14:17 LOG7[223:1737]: Creating a new thread 2008.11.11 00:14:17 LOG7[223:1737]: New thread created 2008.11.11 00:14:17 LOG7[251:1737]: sbc started 2008.11.11 00:14:17 LOG7[251:1737]: FD 15 in non-blocking mode 2008.11.11 00:14:17 LOG7[251:1737]: TCP_NODELAY option set on local socket 2008.11.11 00:14:17 LOG5[251:1737]: sbc accepted connection from 127.0.0.1:61053 2008.11.11 00:14:17 LOG7[251:1737]: FD 16 in non-blocking mode 2008.11.11 00:14:17 LOG7[251:1737]: sbc connecting 69.147.64.31:465 2008.11.11 00:14:17 LOG7[251:1737]: connect_wait: waiting 10 seconds 2008.11.11 00:14:17 LOG7[251:1737]: connect_wait: connected 2008.11.11 00:14:17 LOG5[251:1737]: sbc connected remote server from 192.168.69.14:61054 2008.11.11 00:14:17 LOG7[251:1737]: Remote FD=16 initialized 2008.11.11 00:14:17 LOG7[251:1737]: TCP_NODELAY option set on remote socket 2008.11.11 00:14:17 LOG7[251:1737]: SSL state (connect): before/connect initialization 2008.11.11 00:14:17 LOG7[251:1737]: SSL state (connect): SSLv3 write client hello A 2008.11.11 00:14:17 LOG7[251:1737]: SSL state (connect): SSLv3 read server hello A 2008.11.11 00:14:17 LOG5[251:1737]: VERIFY IGNORE: depth=0, /C=US/ST=California/L=Santa Clara/O=Yahoo! Inc./OU=Yahoo/CN=smtp.att.yahoo.com 2008.11.11 00:14:17 LOG5[251:1737]: VERIFY OK: depth=0, /C=US/ST=California/L=Santa Clara/O=Yahoo! Inc./OU=Yahoo/CN=smtp.att.yahoo.com 2008.11.11 00:14:17 LOG5[251:1737]: VERIFY IGNORE: depth=0, /C=US/ST=California/L=Santa Clara/O=Yahoo! Inc./OU=Yahoo/CN=smtp.att.yahoo.com 2008.11.11 00:14:17 LOG5[251:1737]: VERIFY OK: depth=0, /C=US/ST=California/L=Santa Clara/O=Yahoo! Inc./OU=Yahoo/CN=smtp.att.yahoo.com 2008.11.11 00:14:17 LOG5[251:1737]: VERIFY IGNORE: depth=0, /C=US/ST=California/L=Santa Clara/O=Yahoo! Inc./OU=Yahoo/CN=smtp.att.yahoo.com 2008.11.11 00:14:17 LOG5[251:1737]: VERIFY OK: depth=0, /C=US/ST=California/L=Santa Clara/O=Yahoo! Inc./OU=Yahoo/CN=smtp.att.yahoo.com 2008.11.11 00:14:17 LOG7[251:1737]: SSL state (connect): SSLv3 read server certificate A 2008.11.11 00:14:17 LOG7[251:1737]: SSL state (connect): SSLv3 read server certificate request A 2008.11.11 00:14:17 LOG7[251:1737]: SSL state (connect): SSLv3 read server done A 2008.11.11 00:14:17 LOG7[251:1737]: SSL state (connect): SSLv3 write client certificate A 2008.11.11 00:14:17 LOG7[251:1737]: SSL state (connect): SSLv3 write client key exchange A 2008.11.11 00:14:17 LOG7[251:1737]: SSL state (connect): SSLv3 write certificate verify A 2008.11.11 00:14:17 LOG7[251:1737]: SSL state (connect): SSLv3 write change cipher spec A 2008.11.11 00:14:17 LOG7[251:1737]: SSL state (connect): SSLv3 write finished A 2008.11.11 00:14:17 LOG7[251:1737]: SSL state (connect): SSLv3 flush data 2008.11.11 00:14:18 LOG7[251:1737]: SSL alert (read): fatal: bad certificate 2008.11.11 00:14:18 LOG3[251:1737]: SSL_connect: 14094412: error:14094412:SSL routines:SSL3_READ_BYTES:sslv3 alert bad certificate 2008.11.11 00:14:18 LOG5[251:1737]: Connection reset: 0 bytes sent to SSL, 0 bytes sent to socket 2008.11.11 00:14:18 LOG7[251:1737]: sbc finished (0 left) ....[ end log ].... - -- jimoe (at) sohnen-moe (dot) com -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.7 (OS/2) iD8DBQFJGe4zzTcr8Prq0ZMRAhSPAJ4h6YHyR+/W5brb7FK1tbbW1zYZ+wCglxpC 9k2qqpP2hN99BL0TnsNhlnw= =P74g -----END PGP SIGNATURE-----

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Extending stunnels connect functionality
by bernhard.czech＠nobiscum.de 24 Nov '08

24 Nov '08

Hi all, we are looking for somebody to extend stunnel's multiple connect functionality a bit as of: - adding the ability to send a configurable string to each "connect" and compare the answer against an configured expectation string - the expectation should also be able to be interpreted as an regular expression. - the testing interval should be configurable - an alternative port should be configurable - it should be possible to call a script instead of doing a connection with the connect string provided as a parameter. - a way of monitoring might all paths might be good (i.e. writing a status file on regular basis) These things are pretty much the same things that LVS ( http://www.linuxvirtualserver.org/) provides. But we would like to reduce the complexity in our environment a bit. If somebody is interested to implement this feel free to contact me. If possible with an amount of expected reward. Kind regards, Bernhard Czech -- Bernhard Czech nobisCum Individual GmbH [T] +49 (0) 931 / 79 66 7-90 44 [F] +49 (0) 931 / 79 66 7-29 [M] +49 (0)175 / 90 51 45 8 [@] Bernhard.Czech(a)nobiscum.de [URL] www.nobiscum.de [Anschrift] Sedanstraße 23, 97082 Würzburg, Germany [Registergericht] Würzburg, HRB 5159 [Geschäftsführer] Markus Frisch, Hans-Peter Holl

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Tunnel traffic from a network interface
by Kjetil Holien 23 Nov '08

23 Nov '08

Hi! Is it possible to capture traffic from one network interface on one computer, tunnel it to a second computer by stunnel and then send it through a network interface on that computer? This without changing any data on the network traffic (MAC adresses, IP etc). Thanks for any answers! greetings, Kjetil

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Amount of FD's per connection
by Koornstra, Reinoud 21 Nov '08

21 Nov '08

Hi, I am using stunnel compiled to use threads. I read in the faq that a connection may use 1 to 4 fd's per connection. Normally this is only one, how can I influence this, I mean making sure there is one fd per connection? I also wish to limit the amount of max connections at the same time. Perhaps the most easy way is limit the amount of fd's per process with ulimit. However, depending on how many fd's are needed per connection it is difficult to set right now. Kind Regards, Reinoud.

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xforwardedfor patch for 4.26?
by Chris Charman 19 Nov '08

19 Nov '08

Has anyone done such a thing? Alternately, are there good instructions someplace for setting up transparent proxy?

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Re: [stunnel-users] Cannot connect to SBC/yahoo to send (or telnet)
by James Moe 19 Nov '08

19 Nov '08

-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 On 11/19/08 03:20 am, kith walls wrote: > When connecting to SBC/Yahoo you need to front the session with HTTP. > I am not clear what you mean. Would you give an example? >> Hello, >> Stunnel v4.20. >> When connecting to SBC/Yahoo, the session is > terminated >> with a "bad certificate" message. See the > log below. The tech folks claim >> all is well at their end. >> Is there something I am missing here? >> Here is the conf file: > - -- jimoe (at) sohnen-moe (dot) com -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.7 (OS/2) iD8DBQFJJEsmzTcr8Prq0ZMRAjiTAJ9n/nZO2zaZemqvsU2Y1ge30OYdJQCeN3Oc Wj0dFPjjSH7qbV5d5L/F3ck= =ijQ0 -----END PGP SIGNATURE-----

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Proxy support in configuration file?
by Reinier van der Gugten 19 Nov '08

19 Nov '08

Is there proxy support for Stunnel, and if so, how do I specify the proxy server in the configuration file? If it is not supported, can you give me a price estimate on what it would cost to add it? Greetings, Reinier. E.g. I want to connect to an external location at: Myserver.com:443 The proxy is at: CustomerProxy:8080 And my application runs at the customer talking to: localhost:1433 The proxy does not require authentication. Looking at the docuemtation you linked me I found this example: CONNECT server.example.com:80 HTTP/1.1 Host: server.example.com:80 Proxy-Authorization: basic aGVsbG86d29ybGQ= Using my addresses, where goes what? CONNECT CustomerProxy:8080 HTTP/1.1 Host: Myserver.com:443 // Proxy-Authorization: basic aGVsbG86d29ybGQ= Kind regards, Reinier -----Original Message----- From: stunnel-users-bounces(a)mirt.net [mailto:[email protected]] On Behalf Of Michal Trojnara Sent: vrijdag 14 november 2008 15:04 To: stunnel-users(a)mirt.net Subject: Re: [stunnel-users] Proxy support On Fri, 14 Nov 2008 14:53:20 +0100, "Reinier van der Gugten" <info(a)rgit.eu> wrote: > Has someone got a working version of STunnel that can handle a proxy? Do you mean client mode CONNECT protocol support (RFC 2817 section 5.2)? http://www.ietf.org/rfc/rfc2817.txt It's supported in stunnel since version 4.15 (released 2006.03.11). Best regards, Mike _______________________________________________ stunnel-users mailing list stunnel-users(a)mirt.net http://stunnel.mirt.net/mailman/listinfo/stunnel-users _______________________________________________ stunnel-users mailing list stunnel-users(a)mirt.net http://stunnel.mirt.net/mailman/listinfo/stunnel-users

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stunnel and expiring CRLs
by Jason Haar 19 Nov '08

19 Nov '08

Hi there Is stunnel capable of re-reading updated CRLs on the fly? Without needing to be restarted? I have tried both CRLfile and CRLpath (with the hashes) with no luck. It appear stunnel only reads them on startup and never refers to them again? There also seems to be no option to send a HUP or the like to force a re-read - only a full restart will make stunnel re-read the CRLs. i.e. our system works after a fresh restart until the original CRL expires, and then stunnel starts rejecting new connections with "Found CRL is expired - revoking all certificates until you get updated CRL" - even though there have been several CRL file (and hash) updates in between. Restarting stunnel makes it start working again. I've googled around and see several other people have asked similar questions over the years, and there are references by Michal Trojnara that it should work? This is stunnel-4.14-2 under CentOS5 with openssl-0.9.8b-8.3.el5_0.2. No chroot jail Thanks! -- Cheers Jason Haar Information Security Manager, Trimble Navigation Ltd. Phone: +64 3 9635 377 Fax: +64 3 9635 417 PGP Fingerprint: 7A2E 0407 C9A6 CAF6 2B9F 8422 C063 5EBB FE1D 66D1

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stunnel-users November 2008