- stunnel-users - stunnel.org

expired certificate problem
by Rolf Ruediger 18 Nov '11

18 Nov '11

Hello there! Some time ago I used stunnel to send the output of a homebrew logging script to a remote server. For a few weeks now, the sever has an expired certificate, so I get an error while connecting to it. The stunnel.log looks like that: 2011.11.18 12:23:36 LOG5[753:3078719168]: stunnel 4.29 on i486-pc-linux-gnu with OpenSSL 0.9.8o 01 Jun 2010 2011.11.18 12:23:36 LOG5[753:3078719168]: Threading:PTHREAD SSL:ENGINE Sockets:POLL,IPv6 Auth:LIBWRAP 2011.11.18 12:23:36 LOG5[753:3078719168]: 500 clients allowed 2011.11.18 12:24:00 LOG5[759:3078716272]: https accepted connection from 127.0.0.1:40691 2011.11.18 12:24:00 LOG5[759:3078716272]: connect_blocking: connected example.com:443 2011.11.18 12:24:00 LOG5[759:3078716272]: https connected remote server from my_outside_ip:38486 2011.11.18 12:24:00 LOG3[759:3078716272]: SSL_connect: 14094415: error:14094415:SSL routines:SSL3_READ_BYTES:sslv3 alert certificate expired 2011.11.18 12:24:00 LOG5[759:3078716272]: Connection reset: 0 bytes sent to SSL, 0 bytes sent to socket This happens, when connecting manually with "nc -v 127.0.0.1 1234" to make a http-get request. To also provide the config file of my linux client: ; Sample stunnel configuration file by Michal Trojnara 2002-2009 ; Some options used here may not be adequate for your particular configuration ; Please make sure you understand them (especially the effect of the chroot jail) ; Certificate/key is needed in server mode and optional in client mode cert = /etc/ssl/certs/https.pem ;key = /etc/ssl/certs/stunnel.pem ; Protocol version (all, SSLv2, SSLv3, TLSv1) sslVersion = SSLv3 ; Some security enhancements for UNIX systems - comment them out on Win32 chroot = /var/lib/stunnel4/ setuid = stunnel4 setgid = stunnel4 ; PID is created inside the chroot jail pid = /stunnel4.pid ; Some performance tunings socket = l:TCP_NODELAY=1 socket = r:TCP_NODELAY=1 ;compression = zlib ; Workaround for Eudora bug ;options = DONT_INSERT_EMPTY_FRAGMENTS ; Authentication stuff ;verify = 2 ; Don't forget to c_rehash CApath ; CApath is located inside chroot jail ;CApath = /certs ; It's often easier to use CAfile ;CAfile = /etc/stunnel/certs.pem ; Don't forget to c_rehash CRLpath ; CRLpath is located inside chroot jail ;CRLpath = /crls ; Alternatively you can use CRLfile ;CRLfile = /etc/stunnel/crls.pem ; Some debugging stuff useful for troubleshooting ;debug = 7 output = /var/log/stunnel4/stunnel.log ; Use it for client mode client = yes ; Service-level configuration [https] accept = 127.0.0.1:1234 connect = example.com:443 TIMEOUTclose = 0 ;[pop3s] ;accept = 995 ;connect = 110 ;[imaps] ;accept = 993 ;connect = 143 [ssmtp] accept = 465 connect = 25 ;[https] ;accept = 443 ;connect = 80 ;TIMEOUTclose = 0 ; vim:ft=dosini So, the server is not under my control, where I am logging to. Is there a problem I don't see? I thought, that when I connect to localhost, the data should be forwarded to the https-server. Thanks in advance. -Rolf

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[patch] x-forwarded-for patch for the new stunnel 4.46
by Michel Belleau 17 Nov '11

17 Nov '11

Hi. I use HAProxy and STunnel and I had to do a new installation lately. I took time to check the latest versions available of each product as this is a good time to test it out before production roll-out. I figured out that enough things have changed from STunnel version 4.44 to 4.46 making the X-Forwarded-For patch (that is usually used when STunnel sits in front of HAProxy) reject some parts of the latest 4.44 patch I found on the internet. Here is the patch, applying with no problems on 4.46, for anyone else interested: http://labs.malaiwah.com/stunnel-4.46-xforwarded-for.diff PS: I didn't try it yet for IPv6 connections yet. Michel Belleau

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Re: [stunnel-users] FW: I can't get stunnel working : SSL3_GET_RECORD:wrong version number
by Michal Trojnara 17 Nov '11

17 Nov '11

The Guru wrote: > When I try to connect, > stunnel reports an error "wrong version number". [cut] > read from 0x4b5f98 [0x4cc0a0] (7 bytes => 7 (0x7)) > 0000 - 16 03 00 0d 01 02 ...... Your server reply protocol version is 3.0. You may wish to enable TLS on your server, or to specify: sslVersion = SSLv3 in your stunnel.conf. Best regards, Michal Trojnara

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Multiple Windows Services
by John W 14 Nov '11

14 Nov '11

I upgraded from stunnel 4.34 to 4.46 (Windows) today, which took much more time than expected. First, I was surprised to see that my specified service name (via "service =" was ignored), until I eventually found the note in the 4.42 changelog about "Removed support for changing Windows Service name with "service"". This isn't the end of the world (I changed the display name using sc) but it would be very helpful -- and time saving -- if the man page was updated to reflect this change. A bigger issue I ran into is that because the service can't be renamed, I can have only one stunnel service installed. The only mention of this I found was a reply to a list question saying "Running more than one stunnel service has been obsoleted." What was the motivation behind this change? Though I can specify multiple [service] sections in stunnel.conf, I see no way to control them individually. It has been useful to have separate stunnel (Windows) services installed, which can be stopped and started independently. Thanks.

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[PATCH]: Debugging output
by Andrew Watts 08 Nov '11

08 Nov '11

Hi. According to the manpage for the output=<file> configuration directive, if this is set then it should replace syslog facility logging. However, stunnel 4.45 (and ealier version) on linux send debugging information to both syslog and a logfile when output is specified. The following patch makes stunnel behave according to the manpage "append log messages to a file instead of using syslog": ==================================== --- a/src/log.c +++ b/src/log.c @@ -163,7 +163,7 @@ static void log_raw(const int level, con line=str_printf("%s %s: %s", stamp, id, text); if(level<=global_options.debug_level) { #if !defined(USE_WIN32) && !defined(__vms) - if(global_options.option.syslog) + if(global_options.option.syslog && !global_options.output_file) syslog(level, "%s: %s", id, text); #endif /* USE_WIN32, __vms */ if(outfile) ==================================== ~ Andy

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Error detected on socket (read) file descriptor: Broken pipe (32)
by Alex Magee 08 Nov '11

08 Nov '11

Hello, I'm trying to use stunnel to workaround a wine bug which prevents an old Windows mail client from accessing my mail server through a pop3s 995 port. I'm not an expert on linux, stunnel, sockets or ssl. The process seems to start off well, establishes a connection to the correct remote mail server, and negotiates an ssl connection, but then terminates with: Error detected on socket (read) file descriptor: Broken pipe (32) I've played with various settings in the stunnel.conf file, but with no success. A Google search turned up one other example of this problem back in Nov 2010, but no solution was forthcoming. Does anyone have any suggestions of what might be the problem? The level 7 debug stunnel.log file follows at the end, with TCP addresses masked. The system is SUSE Linux 11.4. Using the latest versions of ssl and stunnel. Thanks, Alex stunnel.log -------------- local socket: FD=0 allocated (non-blocking mode) Service pmail-pop3 accepted FD=0 from 127.0.0.1:48828 Service pmail-pop3 started Option TCP_NODELAY set on local socket Service pmail-pop3 accepted connection from 127.0.0.1:48828 remote socket: FD=1 allocated (non-blocking mode) connect_blocking: connecting xxx.xxx.xxx.xxx:995 connect_blocking: s_poll_wait xxx.xxx.xxx.xxx:995: waiting 10 seconds connect_blocking: connected xxx.xxx.xxx.xxx:995 Service pmail-pop3 connected remote server from 192.168.1.47:46187 Remote FD=1 initialized Option TCP_NODELAY set on remote socket SNI: host name: yyy.yyy.yyy..com SSL state (connect): before/connect initialization SSL state (connect): SSLv3 write client hello A SSL state (connect): SSLv3 read server hello A SSL state (connect): SSLv3 read server certificate A SSL state (connect): SSLv3 read server done A SSL state (connect): SSLv3 write client key exchange A SSL state (connect): SSLv3 write change cipher spec A SSL state (connect): SSLv3 write finished A SSL state (connect): SSLv3 flush data SSL state (connect): SSLv3 read finished A 1 items in the session cache 1 client connects (SSL_connect()) 1 client connects that finished 0 client renegotiations requested 0 server connects (SSL_accept()) 0 server connects that finished 0 server renegotiations requested 0 session cache hits 0 external session cache hits 0 session cache misses 0 session cache timeouts SSL connected: new session negotiated Negotiated ciphers: RC4-SHA SSLv3 Kx=RSA Au=RSA Enc=RC4(128) Mac=SHA1 Socket closed on read Sending SSL write shutdown Error detected on socket (read) file descriptor: Broken pipe (32) Connection reset: 79 bytes sent to SSL, 64 bytes sent to socket Service pmail-pop3 finished (0 left) str_stats: 0 block(s), 0 byte(s)

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stunnel 4.46 released
by Michal Trojnara 07 Nov '11

07 Nov '11

Dear Users, I have released version 4.46 of stunnel. The ChangeLog entry: Version 4.46, 2011.11.04, urgency: LOW: * New features - Added Unix socket support (e.g. "connect = /var/run/stunnel/ socket"). - Added "verify = 4" mode to ignore CA chain and only verify peer certificate. - Removed the limit of 16 IP addresses for a single 'connect' option. - Removed the limit of 256 stunnel.conf sections in PTHREAD threading model. It is still not possible have more than 63 sections on WIN32 platform. http://msdn.microsoft.com/en-us/library/windows/desktop/ms740141(v=vs.85).a… * Optimizations - Reduced per-connection memory usage. - Performed a major refactoring of internal data structures. Extensive internal testing was performed, but some regression bugs are expected. * Bugfixes - Fixed WIN32 compilation with Mingw32. - Fixed non-blocking API emulation layer in UCONTEXT threading model. - Fixed signal handling in UCONTEXT threading model. Home page: http://www.stunnel.org/ Download: ftp://ftp.stunnel.org/stunnel/ SHA-256 hash for stunnel-4.46.tar.gz: 8ea8943bdfcd74a2e66dc00d4ed17b402bbd39d040a125901534f6f4308da99d Best regards, Mike

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Stunnel & Haproxy
by Christophe Rahier 03 Nov '11

03 Nov '11

Hi, I'd like to user Stunnel with Haproxy on a Debian Squeeze server. I downloaded these files: wget ftp://ftp.stunnel.org/stunnel/obsolete/4.x/stunnel-4.44.tar.gz wget http://haproxy.1wt.eu/download/patches/stunnel-4.44-xforwarded-for.diff I patch the file with patch -p1 < ../stunnel-4.44-xforwarded-for.dif After this, I try to "make". I've a lot of errors and I don't understand, I'm not a Linux guru! :-( Errors : Making all in src make[1]: Entering directory `/tmp/stunnel-4.44/src' make all-am make[2]: Entering directory `/tmp/stunnel-4.44/src' gcc -DHAVE_CONFIG_H -I. -I/usr/kerberos/include -I/usr//include -DLIBDIR='"/usr/local/lib/stunnel"' -DCONFDIR='"/usr/local/etc/stunnel"' -DPIDFILE='"/usr/local/var/run/stunnel/stunnel.pid"' -pthread -fstack-protector -g -O2 -Wall -Wextra -Wno-long-long -pedantic -MT stunnel-str.o -MD -MP -MF .deps/stunnel-str.Tpo -c -o stunnel-str.o `test -f 'str.c' || echo './'`str.c In file included from str.c:38: common.h:383:19: error: lhash.h: No such file or directory common.h:384:17: error: ssl.h: No such file or directory common.h:386:20: error: crypto.h: No such file or directory common.h:387:17: error: md4.h: No such file or directory common.h:388:17: error: des.h: No such file or directory In file included from str.c:39: prototypes.h:117: error: expected specifier-qualifier-list before 'SSL_CTX' prototypes.h:368: error: expected specifier-qualifier-list before 'SSL' prototypes.h:391: warning: struct has no members prototypes.h:469: error: 'PEM_BUFSIZE' undeclared here (not in a function) str.c: In function 'str_canary': str.c:210: warning: implicit declaration of function 'RAND_bytes' str.c: In function 'str_stats': str.c:239: warning: format '%d' expects type 'int', but argument 3 has type 'size_t' str.c:239: warning: format '%d' expects type 'int', but argument 4 has type 'size_t' str.c:239: warning: format '%d' expects type 'int', but argument 5 has type 'long unsigned int' make[2]: *** [stunnel-str.o] Error 1 make[2]: Leaving directory `/tmp/stunnel-4.44/src' make[1]: *** [all] Error 2 make[1]: Leaving directory `/tmp/stunnel-4.44/src' make: *** [all-recursive] Error 1 Could you help me? Thanks for your help. Regards, Christophe

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Why does verify=3 require the entire cert chain to be present in cafile?
by al_9x＠yahoo.com 03 Nov '11

03 Nov '11

If the leaf (server) cert is declared trusted (added to the cafile), there is no point in walking the trust chain.

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[PATCH] Unix socket tunnelling
by Antoine Catton 02 Nov '11

02 Nov '11

Hi, I was looking for solution for tunneling a MySQL socket through encrypted IPv6. And I found this bunch of patches for stunnel <http://www.exceliance.fr/download/free/patches/stunnel/unix-sockets/>. Unfortunately, there's no patch for stunnel 4.44. So I rebased it in order to make it work (I attached it to this email). FYI, I’m not the author of this patch, I just adapted it for stunnel 4.44. The author seems to be this french company <http://www.exceliance.fr/en>. I just glanced over it, I didn't review it. Anyway, I think it would be a great thing to integrate it into stunnel in order to avoid rebasing the patch for every stunnel new version. Besides, it is a very useful feature. Integrating this patch would imply updating the documentation of stunnel configuration. As far as I know it add another general option “unix-sockets-dir” which is “/var/run/” by default. All the socket path must start by a slash, and this path will be appended to “unix-sockets-dir” option. Thank you. Regards, -- Antoine Catton Nexedi Intern

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