stunnel-users

3306 discussions

Re: [stunnel-users] Comparing with BarracudaDrive and Proxytunnel
by Michal Trojnara 12 Jun '06

12 Jun '06

On 2006-06-11, at 21:39, http s wrote: > I am curious if anyone has made a comparison of Stunnel with the > BarracudaDrive HTTPS tunnel and/or Proxytunnel? > > http://barracudaserver.com/examples/BarracudaDrive/HttpsTunnel/ > index.html 1. BarracudaDrive is *not* a free software (even though its home page claims so). See http://www.gnu.org/philosophy/free-sw.html for details. 2. It only works on Windows, Linux, QNX and Mac OS X. Compare it to the list on http://stunnel.mirt.net/. 3. BarracudaDrive is designed to be used for file transfer, while stunnel is a universal tool for encrypting TCP streams. As the result stunnel is much more flexible, but it won't perform any file transfer by itself. > http://proxytunnel.sourceforge.net 1. It's not really an encryption tool, but rather an extension for OpenSSH client. It has some optional basic SSL code (as for version 1.6.0), but it's currently broken. The code incorrectly assumes that SSL_read() only needs to read from a file descriptor and SSL_write() only needs to wrote to a file descriptor. 2. Proxytunnel supports NTLM authentication that is not currently supported by stunnel. 3. It looks like an interesting addition to stunnel on a Unix platform. The client configuration should be something like: [Proxytunnel] client = yes accept = 12345 exec = /path/to/proxytunnel execargs = proxytunnel -p proxy:8080 -u user -s pass -d mybox.athome.nl:443 4. Optional use of stunnel is recommended in README file of Proxytunnel 1.6.0. 8-) Best regards, Mike

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socket closed after SSL_write
by Srilalitha Muralidhara(HCL Capital Market Services) 12 Jun '06

12 Jun '06

Hi, I work on a client-server application that needs to be supported on both UNIX and windows platforms. Currently, we keep one socket open for all communication from client to server (during which many read-write operations take place) For user authentication and security purposes, we are planning to implement SSL-Stunnel. I have developed a small ssl client (based on sclient.c example) which connects to the Stunnel Server. Upon the first SSL_write, SSL is closing the underlying socket. Hence the contents written by subsequent SSL_write operations are not visible in the server log. I saw lot of posts on the same problem. But couldn't find the solution. Any help is greatly appreciated. Please note that: 1. Due platform independency issues, I use RWSocket (a Roguewave library class) instead of the BSD socket in conjunction with SSL. A potion of stunnel server log 2006.06.12 10:47:43 LOG7[19699:28]: FD 1 in non-blocking mode 2006.06.12 10:47:43 LOG7[19699:28]: rssvr connecting 127.0.0.1:28091 2006.06.12 10:47:43 LOG7[19699:28]: Remote FD=1 initialized 2006.06.12 10:47:43 LOG7[19699:28]: TCP_NODELAY option set on remote socket 2006.06.12 10:47:45 LOG7[19699:28]: Socket closed on read 2006.06.12 10:47:45 LOG7[19699:28]: SSL write shutdown 2006.06.12 10:47:45 LOG7[19699:28]: SSL alert (write): warning: close notify 2006.06.12 10:47:45 LOG7[19699:28]: SSL_shutdown retrying 2006.06.12 10:47:45 LOG7[19699:28]: SSL doesn't need to read or write 2006.06.12 10:47:50 LOG3[19699:28]: SSL_read: Connection reset by peer (131) 2006.06.12 10:47:50 LOG5[19699:28]: Connection reset: 0 bytes sent to SSL, 26 bytes sent to socket 2006.06.12 10:47:50 LOG7[19699:28]: linger (remote): Invalid argument (22) 2006.06.12 10:47:50 LOG7[19699:28]: linger (local): Invalid argument (22) 2006.06.12 10:47:50 LOG7[19699:28]: rssvr finished (0 left) Thanks Sri Srilalitha Muralidhara This e-mail 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 and destroy this e-mail. Any unauthorized copying, disclosure or distribution of the material in this e-mail is strictly forbidden. Disclaimer: *********** The contents of this E-mail (including the contents of the enclosure(s) or attachment(s) if any) are privileged and confidential material of HCL Capital Market Services and should not be disclosed to, used by or copied in any manner by anyone other than the intended addressee(s). In case you are not the desired addressee, you should delete this message and/or re-direct it to the sender. The views expressed in this E-mail message (including the enclosure(s) or attachment(s) if any) are those of the individual sender, except where the sender expressly, and with authority, states them to be the views of HCL Capital Market Services. This e-mail message including attachment/(s), if any, is believed to be free of any virus. However, it is the responsibility of the recipient to ensure that it is virus free and HCL Capital Market Services is not responsible for any loss or damage arising in any way from its use.

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Reposting...RE: stunnel-users Digest, Vol 23, Issue 2
by Nagasundaram, Sekhar 09 Jun '06

09 Jun '06

Any one... Is there a way to have Stunnel not stop accepting new connections after CRL expiry? See my questions below.. Any help is appreciated... Much thanks Sekhar ---------------------------------------------------------------------- Message: 1 Date: Tue, 6 Jun 2006 15:41:08 -0700 From: "Nagasundaram, Sekhar" <snagasun(a)visa.com> Subject: [stunnel-users] Processing during CRL expiry and refresh To: <stunnel-users(a)mirt.net> Message-ID: <F64762DF94A15C4EA22D250B28D98BE610093C(a)sw720ex064.visa.com> Content-Type: text/plain; charset="US-ASCII" All: I have 2 questions: 1. Is there a way to have Stunnel continue processing and accepting connections after the CRL expiry? Currently it gives a "revoking all certificates" error and stops accepting new connections. 2. Is there a configurable parameter through which we can have the CRL list refresh itself such that 1 above does not happen? Much Thanks in advance.. Sekhar ------------------------------ _______________________________________________ stunnel-users mailing list stunnel-users(a)mirt.net http://stunnel.mirt.net/mailman/listinfo/stunnel-users End of stunnel-users Digest, Vol 23, Issue 2 ********************************************

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syslog-ng over stunnel does not work for me
by Christoph Pleger 08 Jun '06

08 Jun '06

Hello, I set up a server and a client machine to test the combination of stunnel and syslog-ng. I followed the instructions in the example at http://www.stunnel.org/examples/syslog-ng.html, but the log messages are not sent correcly. The log on the server says: ****: syslog started ****: syslog connected from ###.###.###.###:51646 ****: SSL state (accept): before/accept initialization ****: SSL_accept: 140B544E: error: 140B544E: SSL routines:SSL_GET_NEW_SESSION:ssl session id callback failed ****: syslog finished (-1 left) The log on the client says: ****: syslog started ****: syslog connected from 127.0.0.1:3524 ****: FD 8 in non-blocking mode ****: syslog connecting ###.###.###.###:514 ****: connect_wait: waiting 10 seconds ****: connect_wait: connected ****: Remote FD=8 initialized ****: SSL state (connect): before/accept initialization ****: SSL state (connect): SSLv3 write client hello A ****: SSL_connect: Peer suddenly disconnected ****: syslog finished (0 left) Please help. Regards Christoph

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Connection Reset by Peer
by Srilalitha Muralidhara(HCL Capital Market Services) 08 Jun '06

08 Jun '06

Hi, My stunnel server is unable to send data correctly to my application running the same machine. This happens when the client is run from windows platform. When client is run from UNIX everything works fine. The Stunnel Server log file says: 2006.06.05 11:54:54 LOG7[23141:8]: rssvr connecting 127.0.0.1:28091 2006.06.05 11:54:54 LOG7[23141:8]: Remote FD=1 initialized 2006.06.05 11:54:54 LOG7[23141:8]: TCP_NODELAY option set on remote socket 2006.06.05 11:54:54 LOG3[23141:8]: SSL_read: Connection reset by peer (131) 2006.06.05 11:54:54 LOG5[23141:8]: Connection reset: 0 bytes sent to SSL, 13 bytes sent to socket 2006.06.05 11:54:54 LOG5[23141:8]: linger (local): Invalid argument (22) 2006.06.05 11:54:54 LOG7[23141:8]: rssvr finished (0 left) ------------------------------------------------------------------------ -------------------------------------------------------------------- Does anybody know the cause of the problem? And hopefully the solution? Thanks Sri Disclaimer: *********** The contents of this E-mail (including the contents of the enclosure(s) or attachment(s) if any) are privileged and confidential material of HCL Capital Market Services and should not be disclosed to, used by or copied in any manner by anyone other than the intended addressee(s). In case you are not the desired addressee, you should delete this message and/or re-direct it to the sender. The views expressed in this E-mail message (including the enclosure(s) or attachment(s) if any) are those of the individual sender, except where the sender expressly, and with authority, states them to be the views of HCL Capital Market Services. This e-mail message including attachment/(s), if any, is believed to be free of any virus. However, it is the responsibility of the recipient to ensure that it is virus free and HCL Capital Market Services is not responsible for any loss or damage arising in any way from its use.

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decryption failed or bad record mac
by Trent Townsend 07 Jun '06

07 Jun '06

-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 I've emailed about this once already, but am just giving a *little* more info. It seems similar problems with SSL proliferate the web. The problem is below (message from the client and server posted). I thought it may be a bug reported with SSL and zlib (which a fix isn't due out until the next version of OpenSSL). However, I can successfully start up a openssl s_server and talk to it with a s_client, so I think that eliminates OpenSSL. Has anyone seen this before (I'm sure this is the case) and figured it out? Client: SSL_connect: 140943FC: error:140943FC:SSL routines:SSL3_READ_BYTES:sslv3 alert bad record mac Server: SSL_accept: 1408F455: error:1408F455:SSL routines:SSL3_GET_RECORD:decryption failed or bad record mac I'm using stunnel 4.11 (tried 4.15 also) and Openssl 0.9.8a. Thanks. -----BEGIN PGP SIGNATURE----- Version: PGP Desktop 9.0.6 (Build 6060) iQA/AwUBRIcbw40HAxBKv2yIEQI5XQCg2ylvhIBlZ57euv9/wu8fM5vI40cAoKKk L2bMgFZDc23T6ED6CGJJn8oy =+PA6 -----END PGP SIGNATURE-----

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RE: [stunnel-users] stunnel error
by Nadav, Erez 07 Jun '06

07 Jun '06

Hi, It seems that the problem occur when the client write large buffers (30-40Kbytes) on each write. Any idea how to solve it Thanks Erez ________________________________ From: stunnel-users-bounces(a)mirt.net [mailto:[email protected]] On Behalf Of Nadav, Erez Sent: Wednesday, June 07, 2006 6:00 PM To: stunnel-users(a)mirt.net Subject: [stunnel-users] stunnel error Hi, I use stunnel 4.14 and face this error when performing buffer writes from client to remote side SSL_write: 140D5042: error:140D5042:SSL routines:SSL3_CTRL:called a function you should not call Does anybody know how can I overcome this ??? Thanks Erez ________________________________________________________________________ __________________ This electronic message contains information from Verint Systems, which may be privileged and confidential. The information is intended to be for the use of the individual(s)or entity named above. If you are not the intended recipient, be aware that any disclosure, copying, distribution or use of the contents of this information is prohibited. If you have received this electronic message in error, please notify us by replying to this email (1). __________________________________________________________________________________________ This electronic message contains information from Verint Systems, which may be privileged and confidential. The information is intended to be for the use of the individual(s)or entity named above. If you are not the intended recipient, be aware that any disclosure, copying, distribution or use of the contents of this information is prohibited. If you have received this electronic message in error, please notify us by replying to this email (1).

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stunnel error
by Nadav, Erez 07 Jun '06

07 Jun '06

Hi, I use stunnel 4.14 and face this error when performing buffer writes from client to remote side SSL_write: 140D5042: error:140D5042:SSL routines:SSL3_CTRL:called a function you should not call Does anybody know how can I overcome this ??? Thanks Erez __________________________________________________________________________________________ This electronic message contains information from Verint Systems, which may be privileged and confidential. The information is intended to be for the use of the individual(s)or entity named above. If you are not the intended recipient, be aware that any disclosure, copying, distribution or use of the contents of this information is prohibited. If you have received this electronic message in error, please notify us by replying to this email (1).

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Processing during CRL expiry and refresh
by Nagasundaram, Sekhar 06 Jun '06

06 Jun '06

All: I have 2 questions: 1. Is there a way to have Stunnel continue processing and accepting connections after the CRL expiry? Currently it gives a "revoking all certificates" error and stops accepting connections. 2. Is there a configurable parameter through which we can have the CRL list refresh itself such that 1 above does not happen? Much Thanks in advance.. Sekhar

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unsecure configuration
by Robert Bator 01 Jun '06

01 Jun '06

Hi , I am trying to set up stunnel to accept unsecure calls on port 1001 from inside and secure calls on port 1000 from internet. All calls are forwarded to machin B The configuration like this: secure --> 1000 machine A unsecure --> 1002 machine B unsecure --> 1001 machine A unsecure --> 1002 machine B Is this setup possible i stunnel? PS. I use "stone repeater" and this rules are easy to setup. Best Regards, Robert Bator

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