- stunnel-users - stunnel.org

Generically referencing file locations in stunnel.conf
by Bucci, David G 20 Sep '10

20 Sep '10

Hi - I'm back to trying to run Stunnel with a different user certificate for each user. So far, the best technique I've found is to have a separate stunnel.conf for each user (in their home directory, which is referenced by envvar %USERPROFILE%), and run stunnel using that configuration file. As part of that, I'm trying to generically reference file locations (log, user certificates) in the .conf. But I haven't found a way short of fully pathing the locations in the .conf e.g. "output=c:\users\dbucci\stunnel\stunnel.log". That's undesirable, because it means I have to make every user's .conf unique. So ... is there a generic way to accomplish this? I've tried setting the "Start In" location in the Windows shortcut to that location (via envvar %USERPROFILE%, which allows me to make every user's shortcut generic), then saying "output=.\stunnel.log", but without success - it seems to always be using c:\program files\stunnel as it's starting point for reference. Likewise, the envvar isn't usable in the .conf Note that I thought about creating a subdir per user in C:\program files\stunnel (with appropriate perms for that user), but can't, because in many of our deployment locations, users aren't permitted to write to c:\program files. Btw, this is why I'm asking about the commandline parms in Windows - I don't seem to be able to get them to work, but if I could, I could say e.g. "-o %USERPROFILE%\stunnel\stunnel.log", and that would work generically for every user. Likewise, I could use "-A %USERPROFILE&\stunnel\usercert.pem" and have a generic way of installing user certs. Heck, if I could set ALL the options via command line (-c, -r, etc.) I would love to simply do away with a user-specific .conf file. So ... sorry for rambling a bit, but any help with the intent of what I'm trying to accomplish, make as generic as possible a user-specific config setup? Thx! ---- David G. Bucci Chuck Norris can kick through all 6 degrees of separation, hitting anyone, anywhere, in the face, at any time. -- ChuckNorrisFacts.com

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Command line args available on Windows version 4.33?
by Bucci, David G 20 Sep '10

20 Sep '10

Hi - are all the command line arguments documented at http://www.stunnel.org/faq/args.html#ToC1 available in the Windows 4.33 version? When you execute stunnel -V, very few are listed. And if they are available, do they take precedence over a configuration file, if one is used? (Is a .conf mandatory, or can you set all the required options via command line in the Windows version?) Thx! ---- David G. Bucci Chuck Norris can kick through all 6 degrees of separation, hitting anyone, anywhere, in the face, at any time. -- ChuckNorrisFacts.com

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Accept connections only from local processes?
by Bucci, David G 20 Sep '10

20 Sep '10

Hi - I'm looking to configure Stunnel in client mode to accept connections only from the PC it's running on. Would the config option "socket = a:SO_BINDTODEVICE=lo" accomplish that? And would this work on Windows? (is there a "lo" interface on Windows?) I'm going to do some testing, but thought I'd ask in case someone already knows I'll be pounding sand. And before anyone asks, turning on a firewall isn't an option - we don't have control of all the PCs involved. ---- David G. Bucci Chuck Norris can kick through all 6 degrees of separation, hitting anyone, anywhere, in the face, at any time. -- ChuckNorrisFacts.com

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(no subject)
by Sunil Karumuri 17 Sep '10

17 Sep '10

Hello- I am new to Stunnel and have a basic architecture question. I have Stunnel installed on box A where it receives http messages from multiple client processes . Stunnel sends them to box B via https (mutual ssl). We are seeing that Stunnel opens one connection for each client processes. Can we configure Stunnel to have only ONE SSL connection (or a pool of connections) between box A and B and have Stunnel use the open connection for all traffic from various clients ? We would like to avoid the overhead of SSL-handshake for each new client process. Thanks for the help. Sunil

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Hey buddy, can you review a log file?
by Jay Sprenkle 08 Sep '10

08 Sep '10

Good afterrnoon, Can anyone review the stunnel log file below and see if there's any indication of a problem? What we're doing with stunnel: We're using stunnel to encrypt a tcp connection between a client and our server. What's happening: A client is reporting the connection fails. I believe it's a timeout issue on the client software. My interpretation of this log is that the session is open about 4 seconds then closed by the client. Is that correct? Thanks in advance Stunnel Log: 2010.09.08 14:34:38 LOG7[1392:2328]: Service exchange started 2010.09.08 14:34:38 LOG7[1392:2328]: FD=200 in non-blocking mode 2010.09.08 14:34:38 LOG5[1392:2328]: Service exchange accepted connection from 127.0.0.1:2340 2010.09.08 14:34:38 LOG7[1392:2328]: FD=224 in non-blocking mode 2010.09.08 14:34:38 LOG6[1392:2328]: connect_blocking: connecting xxx.242.123.150:7443 2010.09.08 14:34:38 LOG7[1392:2328]: connect_blocking: s_poll_wait xxx.242.123.150:7443: waiting 10 seconds 2010.09.08 14:34:38 LOG5[1392:2328]: connect_blocking: connected xxx.242.123.150:7443 2010.09.08 14:34:38 LOG5[1392:2328]: Service exchange connected remote server from 192.168.1.29:2341 2010.09.08 14:34:38 LOG7[1392:2328]: Remote FD=224 initialized 2010.09.08 14:34:38 LOG7[1392:2328]: SSL state (connect): before/connect initialization 2010.09.08 14:34:38 LOG7[1392:2328]: SSL state (connect): SSLv3 write client hello A 2010.09.08 14:34:38 LOG7[1392:2328]: SSL state (connect): SSLv3 read server hello A 2010.09.08 14:34:39 LOG7[1392:2328]: SSL state (connect): SSLv3 read server certificate A 2010.09.08 14:34:39 LOG7[1392:2328]: SSL state (connect): SSLv3 read server done A 2010.09.08 14:34:39 LOG7[1392:2328]: SSL state (connect): SSLv3 write client key exchange A 2010.09.08 14:34:39 LOG7[1392:2328]: SSL state (connect): SSLv3 write change cipher spec A 2010.09.08 14:34:39 LOG7[1392:2328]: SSL state (connect): SSLv3 write finished A 2010.09.08 14:34:39 LOG7[1392:2328]: SSL state (connect): SSLv3 flush data 2010.09.08 14:34:39 LOG7[1392:2328]: SSL state (connect): SSLv3 read finished A 2010.09.08 14:34:39 LOG7[1392:2328]: 1 items in the session cache 2010.09.08 14:34:39 LOG7[1392:2328]: 1 client connects (SSL_connect()) 2010.09.08 14:34:39 LOG7[1392:2328]: 1 client connects that finished 2010.09.08 14:34:39 LOG7[1392:2328]: 0 client renegotiations requested 2010.09.08 14:34:39 LOG7[1392:2328]: 0 server connects (SSL_accept()) 2010.09.08 14:34:39 LOG7[1392:2328]: 0 server connects that finished 2010.09.08 14:34:39 LOG7[1392:2328]: 0 server renegotiations requested 2010.09.08 14:34:39 LOG7[1392:2328]: 0 session cache hits 2010.09.08 14:34:39 LOG7[1392:2328]: 0 external session cache hits 2010.09.08 14:34:39 LOG7[1392:2328]: 0 session cache misses 2010.09.08 14:34:39 LOG7[1392:2328]: 0 session cache timeouts 2010.09.08 14:34:39 LOG6[1392:2328]: SSL connected: new session negotiated 2010.09.08 14:34:39 LOG6[1392:2328]: Negotiated ciphers: RC4-MD5 SSLv3 Kx=RSA Au=RSA Enc=RC4(128) Mac=MD5 2010.09.08 14:34:44 LOG7[1392:2328]: SSL socket closed on SSL_read 2010.09.08 14:34:44 LOG7[1392:2328]: Socket write shutdown 2010.09.08 14:34:44 LOG5[1392:2328]: Connection closed: 8 bytes sent to SSL, 48 bytes sent to socket 2010.09.08 14:34:44 LOG7[1392:2328]: Service exchange finished (0 left) -- --- "Is real reporting dead? News at 11!"

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Re: [stunnel-users] Individual user certs for each person who uses Windows PC
by Bucci, David G 07 Sep '10

07 Sep '10

Thx for replying, Scott ... how did you handle multiple users on the PC, though? They all shared that cert? I thought about having a single location and copying to there on user login (from a standard location in a user's home dir, e.g.) ... then firing up stunnel ... but it seems like so much can go wrong, resulting in User B accessing using User A's certificate (because the copy failed, e.g.). And we're leery of exposing User A's cert to User B - especially since stunnel doesn't support encryption of the user's key, right? So the permissions would be a little tricky and maybe fragile. Seems like there should be a straightforward way to do it, dadnabit! ________________________________ From: Scott Gifford <sgifford(a)suspectclass.com> To: Bucci, David G Cc: stunnel-users(a)mirt.net <stunnel-users(a)mirt.net> Sent: Mon Aug 30 17:41:09 2010 Subject: EXTERNAL: Re: [stunnel-users] Individual user certs for each person who uses Windows PC On Mon, Aug 30, 2010 at 3:41 PM, Bucci, David G <david.g.bucci(a)lmco.com<mailto:david.g.bucci@lmco.com>> wrote: [ ... ] I've tried using envvars in the stunnel.conf (e.g., cert = %USERPROFILE%\usercert.pem), tried adjusting the command line to include "-p %USERPROFILE%\usercert.pem" as an option ... We implemented something similar by simply making a "C:\stunnel" directory on each PC, naming the certificate the same thing on all machines, then hardcoding that path into the stunnel configuration (e.g. "C:\stunnel\usercert.pem"). Not quite as nice as %USERPROFILE%\usercert.pem, but it worked. :-) Hope this is helpful, ----Scott.

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Honor --sysconfdir and --localstatedir in stunnel.conf-sample.in
by Sebastian Kayser 01 Sep '10

01 Sep '10

Hi, I am packaging stunnel for opencsw.org. Would you guys mind merging a patch [1] to make use of --sysconfdir and --localstatedir (instead of @prefix@/{etc,var}) in the sample configuration file? Currently, if --sysconfdir and --localstatedir are passed to ./configure and are not a directory below prefix, the configuration file doesn't reflect this layout. The patch is against 4.33. Fedora seems to carry the same change [2]. Sebastian [1]http://gar.svn.sf.net/svnroot/gar/csw/mgar/pkg/stunnel/trunk/files/0001-M… [2]http://lists.fedoraproject.org/pipermail/scm-commits/2010-March/413078.ht…

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[harri.kiiskinen@utu.fi: Bug#594876: stunnel4: Fails to connect, "Input line too long"]
by Rodrigo Gallardo 31 Aug '10

31 Aug '10

----- Forwarded message from Harri Kiiskinen <harri.kiiskinen(a)utu.fi> ----- Date: Mon, 30 Aug 2010 13:26:07 +0300 From: Harri Kiiskinen <harri.kiiskinen(a)utu.fi> To: Debian Bug Tracking System <submit(a)bugs.debian.org> Subject: Bug#594876: stunnel4: Fails to connect, "Input line too long" Package: stunnel4 Version: 3:4.29-1local1 Severity: normal My Univ. recently updated their mail servers, and I could not read my mails anymore with Emacs/mew, that uses stunnel4 for encryption. It turned out the reason was, that the server responded with this string: * OK [CAPABILITY STARTTLS CAPABILITY IMAP4 IMAP4rev1 ACL QUOTA LITERAL+ NAMESPACE UIDPLUS CHILDREN BINARY UNSELECT SORT LANGUAGE IDLE XSENDER X-NETSCAPE XSERVERINFO X-SUN-SORT X-SUN-IMAP X-ANNOTATEMORE X-UNAUTHENTICATE XUM1 AUTH=PLAIN AUTH=PLAIN] Messaging Multiplexor (Sun Java(tm) System Messaging Server 7.3-11.01 (built Sep 1 2009)) It turned out that this was way much longer than what stunnel4 expects. In common.h, one finds #define STRLEN 256 When this is changed to #define STRLEN 512 and the package recompiled, everything works well. Perhaps the length of accepted strings should be increased? Or is this long a response against some standard? All the best, Harri K. -- System Information: Debian Release: squeeze/sid APT prefers testing APT policy: (990, 'testing') Architecture: i386 (i686) Kernel: Linux 2.6.32-3-686 (SMP w/1 CPU core) Locale: LANG=en_IE.UTF-8, LC_CTYPE=en_IE.UTF-8 (charmap=UTF-8) Shell: /bin/sh linked to /bin/bash Versions of packages stunnel4 depends on: ii adduser 3.112 add and remove users and groups ii libc6 2.11.2-2 Embedded GNU C Library: Shared lib ii libssl0.9.8 0.9.8o-1 SSL shared libraries ii libwrap0 7.6.q-19 Wietse Venema's TCP wrappers libra ii netbase 4.42 Basic TCP/IP networking system ii openssl 0.9.8o-1 Secure Socket Layer (SSL) binary a ii perl-modules 5.10.1-14 Core Perl modules stunnel4 recommends no packages. Versions of packages stunnel4 suggests: pn logcheck-database <none> (no description available) -- Configuration Files: /etc/stunnel/stunnel.conf changed [not included] -- no debconf information ----- End forwarded message ----- -- Rodrigo Gallardo

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Individual user certs for each person who uses Windows PC
by Bucci, David G 30 Aug '10

30 Aug '10

Hi, all - I've searched, but can't find any answer on this. Is it possible to configure stunnel with client certificates on, and in such a way that individual users who logon have their own individual certificate used? I've tried using envvars in the stunnel.conf (e.g., cert = %USERPROFILE%\usercert.pem), tried adjusting the command line to include "-p %USERPROFILE%\usercert.pem" as an option ... the closest I've been able to think of (and it's a pretty blunt sword) is to create individual services, one per user and listening on different ports, then having each user access a different URL (well, different port#) ... I would prefer this all work when running as a Windows service, but if it's necessary to train the users to hit a start menu entry or something (e.g., if there's a way to do it using envvars on command line parameters), then the world probably won't end ... This is on Windows, but I'd also appreciate knowing how to do the same on Linux. Thx! ---- David G. Bucci When Dr. Bruce Banner becomes angry, he changes into the Incredible Hulk; when the Incredible Hulk becomes angry, he changes into Chuck Norris. -- ChuckNorrisFacts.com

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Cross-compiling stunnel woes feedback
by Martin van den Nieuwelaar 30 Aug '10

30 Aug '10

Hi everyone (again). I thought I'd post some feedback regarding cross-compiling stunnel, which I have successfully done for an Arm based embedded system we use. I had to edit the 'configure' script in order to remove three sections of code that just check for the cross compiling option, and if set simply exit (message 'cannot check for file existence when cross compiling'). This behaviour really isn't condusive to successful cross compiling. :-) So as I say I removed these sections of code. Next, I configured with './configure --host=arm-linux', then 'make' and the rest are standard as usual. Perhaps the configure script for future releases could be a little more friendly for those cross compiling? Editing the configure file shouldn't be necessary. -- R A Ward Ltd. | We take the privacy of our customers seriously. Christchurch | All sensitive E-Mail attachments MUST be encrypted. New Zealand

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