- stunnel-users - stunnel.org

Re: [stunnel-users] RFC 2487 test in smtp_server not reliable
by Hans Werner Strube 07 Sep '06

07 Sep '06

Hans Werner Strube wrote: > Michal Trojnara wrote: ... > > I'm going to do it the hard way and add another parameter to > > s_poll_wait() function. > > > > IMHO the timeout should be between 100ms and 500ms. What do you think? > > I have not tested the minimum required. However, it should be as short > as possible, since for a client using TLS, the full delay will always > occur on starting a connection. ... I have now done some measurements using snoop on a Solaris Ultra 2 SMTP server (100 MBit/s) with a Windows XP SP2 client (AMD Duron 1 GHz, 56 kBit/s phone-line modem, SeaMonkey 1.04 mail sender [equivalent to Thunderbird 1.5.x]). The delays between the end of initial connection handshake and the first nonzero data packet for six connections were usually between 10 and 100 ms but once reached 150 ms. Thus, 200 ms may be a reasonable value (although the sample is too small to rule out rare failures).

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windows load levels
by Alex Turner 05 Sep '06

05 Sep '06

Guys, Bit of a newbie question here - but very import to me at least. We are looking to secure a web server that does no currently support SSL. One reason for this is that we want to be able to run the server on multiple hosts and doing so means sharing the sessions etc :-( So - I am interested if anyone has tested the stuffing out of stunnel on windows. IE seeing how well it could handle several hundred sockets simultaneously. Not only from a resource point of view, but from a scaling (n, n**2 etc) point of view. Any input at all will be very welcome. Soon I will be starting some test of my own using JMeter to load test. If anyone is interested in the results I will be happy to post. Cheers AJ Alexander J Turner Ph.D. HYPERLINK "http://www.deployview.com"www.deployview.com HYPERLINK "http://www.nerds-central.blogspot.com"www.nerds-central.blogspot.com HYPERLINK "http://www.project-network.com"www.project-network.com -- No virus found in this outgoing message. Checked by AVG Free Edition. Version: 7.1.405 / Virus Database: 268.11.7/437 - Release Date: 04/09/2006

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Stunnel and CryptoApi
by Marco Aldegheri 05 Sep '06

05 Sep '06

Hello list! Someone knows if there is any way to integrate a Windows stunnel in client mode with the Windows Certificate Store? As OpenVPN does with the cryptoapicert parameter in my opinion it would be very useful because: 1. the private key would not just reside in a pem file but could be set not exportable. 2. the private key could be saved on a smartcard. I found a japaneese wstunnel project that seems to do it but I couldn't find any document about it in english and the gui is only in japaneese. Any hints? Thank you, Marco Aldegheri __________________________________________________ Do You Yahoo!? Tired of spam? Yahoo! Mail has the best spam protection around http://mail.yahoo.com

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Real address of client
by Gonzalo Diethelm 03 Sep '06

03 Sep '06

Hello, linux: Linux asus-gonzo 2.6.15-26-686 #1 SMP PREEMPT Thu Aug 3 03:13:28 UTC 2006 i686 GNU/Linux stunnel: stunnel 4.14 on i486-pc-linux-gnu PTHREAD+POLL+IPv6+LIBWRAP with OpenSSL 0.9.8a 11 Oct 2005 apache: Apache/2.0.55 I am using stunnel in Ubuntu to provide https serving to an http-only Apache installation. The stunnel config is: cert = /home/gonzo/src/bg/run/SSL/server.crt key = /home/gonzo/src/bg/run/SSL/server.crt chroot = /var/run/stunnel4/ setuid = stunnel4 setgid = stunnel4 pid = /stunnel4.pid socket = l:TCP_NODELAY=1 socket = r:TCP_NODELAY=1 debug = 7 output = /var/log/stunnel4/stunnel.log client = no [https] accept = 443 connect = 80 TIMEOUTclose = 0 Everything works perfectly, except for one minor detail: on the server, my PHP scripts do not have access to the real IP address of the client, and they always see this value as 127.0.0.1. I am aware the manual says that, if you use -l or -L, there will be an additional REMOTE_HOST environment variable with the desired IP address, but I am not sure how to make this work from a setup like mine, where the http server process is already running. Any help or hints are greatly appreciated. Best regards, -- Gonzalo Diethelm gonzalo.diethelm(a)aditiva.com

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4.16 compilation fails for openssl without engine
by Hans Werner Strube 01 Sep '06

01 Sep '06

When openssl was compiled without engine support, compilation of src/ssl.c in stunnel-4.16 fails because of a misplaced #endif. Patch: --- src/ssl.c.ORI Thu Jun 29 23:12:03 2006 +++ src/ssl.c Fri Sep 1 11:30:25 2006 @@ -286,8 +286,6 @@ s_log(LOG_DEBUG, "Engine %d initialized", current_engine+1); } -#endif - ENGINE *get_engine(int i) { if(i<1 || i>current_engine) return NULL; @@ -294,4 +292,6 @@ return engines[i-1]; } +#endif + /* End of ssl.c */

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Duplicate 220 in protocol.c, smtp_server
by Hans Werner Strube 01 Sep '06

01 Sep '06

At least since stunnel 4.15 - but not yet in 4.09 (don't know about the intermediate versions) - there is a (cosmetic only?) bug in the "welcome" forwarding of the smtp_server in protocol.c (lines 177-187 in 4.16): fdgetline(c, c->remote_fd.fd, line); if(!isprefix(line, "220")) { s_log(LOG_ERR, "Unknown server welcome"); longjmp(c->err, 1); } fdprintf(c, c->local_wfd.fd, "220%s + stunnel", line); fdgetline(c, c->local_rfd.fd, line); if(!isprefix(line, "EHLO ")) { s_log(LOG_ERR, "Unknown client EHLO"); longjmp(c->err, 1); } Although the line read from remote_fd.fd already starts with "220", another 220 is prepended in forwarding to local_wfd.fd, line 182. This seems to haveno adverse effects, but this line should better be changed to: fdprintf(c, c->local_wfd.fd, "%s + stunnel", line);

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stunnel 4.16 released
by Michal Trojnara 01 Sep '06

01 Sep '06

A new version of stunnel has been released. Version 4.16, 2006.08.31, urgency: MEDIUM: * New features sponsored by Hewlett-Packard - A new global option to control engine: engineCtrl = <command>[:<parameter>] - A new service-level option to select engine to read private key: engineNum = <engine number> - OCSP support: ocsp = <URL> * New features - A new option to select version of SSL protocol: sslVersion = all|SSLv2|SSLv3|TLSv1 - Visual Studio vc.mak by David Gillingham <dgillingham(a)gmail.com>. - OS2 support by Paul Smedley (http://smedley.info) * Bugfixes - An ordinary user can install stunnel again. - Compilation problem with --enable-dh fixed. - Some minor compilation warnings fixed. - Service-level CRL cert store implemented. - GPF on protocol negotiations fixed. - Problem detecting addrinfo() on Tru64 fixed. - Default group is now detected by configure script. - Check for maximum number of defined services added. - OpenSSL_add_all_algorithms() added to SSL initialization. - configure script sections reordered to detect pthread library funcions. - RFC 2487 autodetection improved (thx to Hans Werner Strube). High resolution s_poll_wait() not currently supported by UCONTEXT threading. - More precise description of cert directory file names (thx to Muhammad Muquit). * Other changes - Maximum number of services increased from 64 to 256 when poll() is used. Homepage: http://stunnel.mirt.net/ Download: ftp://stunnel.mirt.net/stunnel/ sha1 hash for stunnel-4.16.tar.gz file: 6772e0c7f26c2596564ba66978597db8cd229a72 Best regards, Mike

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Windows simultaneous sockets
by Alex 26 Aug '06

26 Aug '06

Guys, Bit of a newbie question here - but very import to me at least. We are looking to secure a web server that does no currently support SSL. One reason for this is that we want to be able to run the server on multiple hosts and doing so means sharing the sessions etc :-( So - I am interested if anyone has tested the stuffing out of stunnel on windows. IE seeing how well it could handle several hundred sockets simultaneously. Not only from a resource point of view, but from a scaling (n, n**2 etc) point of view. Any input at all will be very welcome. Soon I will be starting some test of my own using JMeter to load test. If anyone is interested in the results I will be happy to post. Cheers AJ -- www.deployview.com www.nerds-central.com www.project-network.com

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stunnel and AJP
by Jones Scott - sjones 25 Aug '06

25 Aug '06

Has anyone used stunnel to secure AJP traffic from apache to jboss *************************************************************************** The information contained in this communication is confidential, is intended only for the use of the recipient named above, and may be legally privileged. If the reader of this message is not the intended recipient, you are hereby notified that any dissemination, distribution or copying of this communication is strictly prohibited. If you have received this communication in error, please resend this communication to the sender and delete the original message or any copy of it from your computer system. Thank You. ****************************************************************************

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stunnel 4-15 through proxy server
by Ingvar Tjøstheim 25 Aug '06

25 Aug '06

Hello I am on a network at work behind a firewall and a proxy server. I can connect to my friends linux computer with putty using proxy configuration and port 443. My friend set up his SSH server on port 443, of course. Yesterday, back home, I installed the following on my Windows2000 computer: Win32OpenSSL-v0.9.8b stunnel ver 4-14 FreeProxy version 3.92 This is the stunnel config file for my home computer: client=no verify=0 [wow] accept = 443 connect = 127.0.0.1:3456 TIMEOUTclose = 0 I set up my router to forward port 443 to this computer. I also registered a DynDNS domain and set up a client to update it. Then, still at home, I prepared another computer which I brought to work today. I installed the following on an XP machine: Win32OpenSSL-v0.9.8b stunnel ver 4-14 (which I upgraded to 4.15 today) SockScap_sc32r238 I set up SockScap to connect to 127.0.0.1 on port 2345 and used it to tunnel a program to the internet through my LAN and this Win2K computer. This was working fine when I was at home. My network at home has no proxy server, and I changed stunnel on my XP computer once at work to version 4-15. Then I added the two protocol lines in the config file as you see below. This is the config file on my XP computer at work: verify = 0 client = yes [wow] accept = 2345 protocol = connect protocolHost = www-proxy.DOMAINNAME.no:80 connect = MYDOMAINNAME.dnsalias.com:443 TIMEOUTclose = 0 Now, the funny thing is that it doesn't work. I used to have a SSH server on my computer at home (which is not running now), and I could connect to it from work. I know the setup could work if I just did things right. I know the FreeProxy and SockScap stuff works, cause it did at home. stunnel and the network is the only difference. Still I get these messages on the XP machine running stunnel as client at work when the SockScap program connects to it: 2006.08.25 10:02:29 LOG5[1280:2940]: stunnel 4.15 on x86-pc-mingw32-gnu with OpenSSL 0.9.7i 14 Oct 2005 2006.08.25 10:02:29 LOG5[1280:2940]: Threading:WIN32 SSL:ENGINE Sockets:SELECT,IPv6 2006.08.25 10:02:29 LOG5[1280:2156]: No limit detected for the number of clients 2006.08.25 10:02:59 LOG5[1280:664]: wow connected from 127.0.0.1:3723 2006.08.25 10:03:05 LOG5[1280:972]: wow connected from 127.0.0.1:3725 2006.08.25 10:03:09 LOG5[1280:664]: Connection reset: 0 bytes sent to SSL, 0 bytes sent to socket 2006.08.25 10:03:15 LOG5[1280:972]: Connection reset: 0 bytes sent to SSL, 0 bytes sent to socket ...and it doesn't work. The program I try using through the tunnel never manages to connect. Anyone have a clue? Thank you very much!

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Re: [stunnel-users] safestring and safename insecure
by Hans Werner Strube 24 Aug '06

24 Aug '06

Michal Trojnara wrote: > Assuming on some systems isprint(x) != isprint(x&0xff): any idea how to > exploit this "insecure" code? > > BTW: At least on Linux and Mac OS X isprint() returns 0 in both cases. The same holds for Solaris. I did not actually encounter an error but just got the idea that something may be insecure here by looking at the lines. After all, isprint etc. are often table-based macros without range-checking the argument. And "man isprint" clearly says that the character is unsigned: (Solaris:) The macro isascii() is defined on all integer values; the rest are defined only where the argument is an int, the value of which is representable as an unsigned char, or EOF, (Linux:) These functions check whether c, which must have the value of an unsigned char or EOF, falls into a certain character class according to the current locale.

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safestring and safename insecure
by Hans Werner Strube 24 Aug '06

24 Aug '06

The macros safestring and safename in common.h are insecure if called for a character with high bit set, because (int)*p will sign-extend the byte on machines where char is signed. Possible patch (here for safestring; for safename correspondingly with isprint -> isalnum): do {char *p; for(p=(s); *p; p++) if(!isprint((int)*(unsigned char *)p)) *p='.';} while(0)

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Re: [stunnel-users] accept is not allowed in inetd mode
by Tomasz Feliksiak 24 Aug '06

24 Aug '06

> I'm afraid I won't be able to tell you what's wrong with your > /etc/stunnel/smtps.conf without your /etc/stunnel/smtps.conf file. > 8-) > I guess you didn't define any service section. > > BTW. Please make sure to read the fine manual. There's also a Polish > version. > http://stunnel.mirt.net/static/stunnel.pl.html > > Greetings from Poland, > Mike You were right. I only define ports but dont uncomment protocol names in [] (like [pop3s]). [pop3s] accept = 995 connect = 110 ;[imaps] ;accept = 993 ;connect = 143 [ssmtp] accept = 465 connect = 25 Now it looks like this and it's working (earlier i have two configs, one per service). Poor thing about this is that it don't log anything before you dont uncomment this [] :P - hope no one other make this mistake. When I uncomment everything else was simple cause I have log :) and know what's going on. There was a problem with binding to ports cause I try to run it by inetd but I find your post at google to not run it by inetd. I change stunnel-inetd-4.15-1 to stunnel-standalone-4.15-1 (PLD Rulez :P) and problems gone. Is possible to run stunnel by inetd??? Thanks for help Michal. Stunnel is great :) Ps. I read the manual, english version. Sad thing is that I dont find out where I make mistake and when I read Polish wersion I do. Good thing is that it will be help for others who make this simple mistake. -- Pozdrawiam Tomasz Feliksiak vonom(a)intertel.net.pl

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Stunnel Crash: Gmail SMTP over TLS
by Shatadal Ghosh 23 Aug '06

23 Aug '06

Hi, I am using stunnel 4.15 on Windows XP SP1 with Mozilla Thunderbird as the e-mail client. I do not have openSSL installed locally. I do have the libssl32.dll and libeay32.dll in the same directory as stunnel.exe (C:\Program Files\stunnel). I am running stunnel as a service. Stunnel crashes when I use it to send e-mail (SMTP via TLS) via gmail. According to the e-mail client configuration page on the gmail website http://mail.google.com/support/bin/answer.py?answer=13287&topic=1555 I tried to use SMTP over TLS to connect to smtp.gmail.com:587 My gmail-smtps block in stunnel.conf was ; SMTP service, listens on localhost:250 [gmail-smtps] protocol=smtp accept=localhost:250 connect=smtp.gmail.com:587 On trying to send an e-mail message via the above configuration stunnel crashed. The log file is as follows 2006.06.14 03:17:15 LOG5[3956:3512]: stunnel 4.15 on x86-pc-mingw32-gnu with OpenSSL 0.9.7i 14 Oct 2005 2006.06.14 03:17:15 LOG5[3956:3512]: Threading:WIN32 SSL:ENGINE Sockets:SELECT,IPv6 2006.06.14 03:17:15 LOG5[3956:3600]: No limit detected for the number of clients 2006.06.14 03:17:15 LOG7[3956:3600]: FD 172 in non-blocking mode 2006.06.14 03:17:15 LOG7[3956:3600]: SO_REUSEADDR option set on accept socket 2006.06.14 03:17:15 LOG7[3956:3600]: gmail-pop3s bound to 127.0.0.1:1100 2006.06.14 03:17:15 LOG7[3956:3600]: FD 180 in non-blocking mode 2006.06.14 03:17:15 LOG7[3956:3600]: SO_REUSEADDR option set on accept socket 2006.06.14 03:17:15 LOG7[3956:3600]: gmail-smtps bound to 127.0.0.1:250 ....# info about other mail connections 2006.06.14 03:17:26 LOG7[3956:3600]: gmail-smtps accepted FD=236 from 127.0.0.1:3665 2006.06.14 03:17:26 LOG7[3956:3600]: Creating a new thread 2006.06.14 03:17:26 LOG7[3956:3600]: New thread created 2006.06.14 03:17:26 LOG7[3956:2812]: gmail-smtps started 2006.06.14 03:17:26 LOG7[3956:2812]: FD 236 in non-blocking mode 2006.06.14 03:17:26 LOG7[3956:2812]: TCP_NODELAY option set on local socket 2006.06.14 03:17:26 LOG5[3956:2812]: gmail-smtps connected from 127.0.0.1:3665 2006.06.14 03:17:26 LOG7[3956:2812]: FD 268 in non-blocking mode 2006.06.14 03:17:26 LOG7[3956:2812]: gmail-smtps connecting 64.233.167.111:587 2006.06.14 03:17:26 LOG7[3956:2812]: connect_wait: waiting 10 seconds 2006.06.14 03:17:26 LOG7[3956:2812]: connect_wait: connected 2006.06.14 03:17:26 LOG7[3956:2812]: Remote FD=268 initialized 2006.06.14 03:17:26 LOG7[3956:2812]: TCP_NODELAY option set on remote socket 2006.06.14 03:17:26 LOG5[3956:2812]: Negotiations for smtp (client side) started 2006.06.14 03:17:26 LOG7[3956:2812]: <- 220 mx.gmail.com ESMTP w66sm450524pyw 2006.06.14 03:17:26 LOG7[3956:2812]: -> 220 mx.gmail.com ESMTP w66sm450524pyw <logfile ends> What mistake am I making? Fortunately it seems that gmail supports SMTP over SSL too (smtp.gmail.com:465) and I am using that. However I am also facing this problem with another account which unfortunately allows SMTP only over TLS. Thanks, Shatadal. --- avast! Antivirus: Outbound message clean. Virus Database (VPS): 0624-1, 06/13/2006 Tested on: 6/14/2006 6:22:04 AM avast! - copyright (c) 2000-2006 ALWIL Software. http://www.avast.com _________________________________________________________________ Is your PC infected? Get a FREE online computer virus scan from McAfee® Security. http://clinic.mcafee.com/clinic/ibuy/campaign.asp?cid=3963

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Re: [stunnel-users] RFC 2487 test in smtp_server not reliable
by Hans Werner Strube 23 Aug '06

23 Aug '06

Michal Trojnara wrote: > On 2006-08-22, at 10:55, Hans Werner Strube wrote: > > Instead of waiting, a better method would > > be to have a finer timeout resolution than 1 sec in > > s_poll_wait(...,...); > > setting the timeout to 1 (sec) would be too embarrassing for TLS > > connections. But this would require major changes in the sources. > > I'm going to do it the hard way and add another parameter to > s_poll_wait() function. > > IMHO the timeout should be between 100ms and 500ms. What do you think? I have not tested the minimum required. However, it should be as short as possible, since for a client using TLS, the full delay will always occur on starting a connection. It should be documented somewhere how this new constant could be configured in compilation.

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RFC 2487 test in smtp_server not reliable
by Hans Werner Strube 23 Aug '06

23 Aug '06

In protocol.c, function smtp_server(), a test for plain SSL or STARTTLS usage (RFC 2487) is based on the availability of data from the client (c->local_rfd.fd). This works well in fast LANs but often fails for WAN connections through slow V90 modems. Especially with new Mozilla-based clients (also KMail and Evolution reported by other users) under Windows XP SP2 the test for data fails almost always, incorrectly resulting in an RFC 2487 handshake with error "Unknown client EHLO". This depends to some extent on the client: Outlook Express mostly works, Mozilla 1.7.x often worked after initial failure, SeaMonkey 1.x always fails. This seems to be a timing problem. I tried inserting a "usleep(50000);" before the switch(s_poll_wait(...)), which made SSL work with SeaMonkey (but often not for the first mail-sending attempt). Unfortunately, in Solaris 7 (where I tested stunnel), usleep is not yet thread-safe, maybe nanosleep(...,...) is preferable. Instead of waiting, a better method would be to have a finer timeout resolution than 1 sec in s_poll_wait(...,...); setting the timeout to 1 (sec) would be too embarrassing for TLS connections. But this would require major changes in the sources.

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accept is not allowed in inetd mode
by vonom 23 Aug '06

23 Aug '06

Hello When i try to run stunnel by scripts or by hand stunnel /etc/stunnel/stunnel.conf (or other config) i see something like that: -bash-3.1# stunnel /etc/stunnel/pop3s.conf 2006.08.23 01:45:17 LOG7[24189:3083933376]: RAND_status claims sufficient entropy for the PRNG 2006.08.23 01:45:17 LOG6[24189:3083933376]: PRNG seeded successfully 2006.08.23 01:45:17 LOG7[24189:3083933376]: Certificate: /etc/stunnel/host-cert.pem 2006.08.23 01:45:17 LOG7[24189:3083933376]: Key file: /etc/stunnel/host-key.pem 2006.08.23 01:45:17 LOG7[24189:3083933376]: SSL context initialized for service stunnel file /etc/stunnel/pop3s.conf line 64: accept is not allowed in inetd mode No stunnel sesion, open ports or anything. I was very happy when I find out that I have stunnel-inetd-4.15-1 in my disto and it runs and ports are open. Everything great but when i try to send or receive email (postfix) it dont work. I spend a lot of time and a while ago i write telnet localhost 465 (or 995), ehlo hostname and see: -bash-3.1# telnet localhost 465 Trying 127.0.0.1.465... Connected to localhost. Escape character is '^]'. 2006.08.23 01:56:20 LOG7[24343:3083708096]: RAND_status claims sufficient entropy for the PRNG 2006.08.23 01:56:20 LOG6[24343:3083708096]: PRNG seeded successfully 2006.08.23 01:56:20 LOG7[24343:3083708096]: Certificate: /etc/stunnel/host-cert.pem 2006.08.23 01:56:20 LOG7[24343:3083708096]: Key file: /etc/stunnel/host-key.pem 2006.08.23 01:56:20 LOG7[24343:3083708096]: SSL context initialized for service stunnel file /etc/stunnel/smtps.conf line 64: accept is not allowed in inetd mode Connection closed by foreign host. When I write telnet localhost 25 -bash-3.1# telnet localhost 25 Trying 127.0.0.1.25... Connected to localhost. Escape character is '^]'. 250-PIPELINING 250-SIZE 10240000 250-VRFY 250-ETRN 250-STARTTLS 250 8BITMIME So It's OK I think. file /etc/stunnel/smtps.conf line 64: accept is not allowed in inetd mode Connection closed by foreign host. -line 64 point just last line of config file. I have no idea what it could be. Anyone know how to fix that?

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Protocol using Connect
by Hutchison, Alan 21 Aug '06

21 Aug '06

I am trying to use the protocol entries in the config file as shown below (xyz substituted to protect employer & vendor). Below is the log. Stunnel abends as it is trying to authenticate to our corporate proxy. The network guys are seeing the attempt to authenticate but it does not appear to complete. Any thoughts? key=maxstpb.crt debug=7 output=stunnel.log client=yes [MarketAxess] accept=127.0.0.1:12345 delay=yes TIMEOUTbusy=120 TIMEOUTconnect=120 connect=xyz.xyz.com:80 protocol=connect protocolHost=xyz.xyz.com:443 protocolCredentials=xyz:xyz 2006.08.21 15:13:24 LOG5[2520:1312]: stunnel 4.15 on x86-pc-mingw32-gnu with OpenSSL 0.9.7i 14 Oct 2005 2006.08.21 15:13:24 LOG5[2520:1312]: Threading:WIN32 SSL:ENGINE Sockets:SELECT,IPv4 2006.08.21 15:13:24 LOG5[2520:3184]: No limit detected for the number of clients 2006.08.21 15:13:24 LOG7[2520:3184]: FD 192 in non-blocking mode 2006.08.21 15:13:24 LOG7[2520:3184]: SO_REUSEADDR option set on accept socket 2006.08.21 15:13:24 LOG7[2520:3184]: MarketAxess bound to 127.0.0.1:12345 2006.08.21 15:14:00 LOG7[2520:3184]: MarketAxess accepted FD=200 from 127.0.0.1:4200 2006.08.21 15:14:00 LOG7[2520:3184]: Creating a new thread 2006.08.21 15:14:00 LOG7[2520:3184]: New thread created 2006.08.21 15:14:00 LOG7[2520:2560]: MarketAxess started 2006.08.21 15:14:00 LOG7[2520:2560]: FD 200 in non-blocking mode 2006.08.21 15:14:00 LOG5[2520:2560]: MarketAxess connected from 127.0.0.1:4200 2006.08.21 15:14:00 LOG7[2520:2560]: FD 416 in non-blocking mode 2006.08.21 15:14:00 LOG7[2520:2560]: MarketAxess connecting xyz.xyz.xyz.xyz:80 2006.08.21 15:14:00 LOG7[2520:2560]: connect_wait: waiting 120 seconds 2006.08.21 15:14:00 LOG7[2520:2560]: connect_wait: connected 2006.08.21 15:14:00 LOG7[2520:2560]: Remote FD=416 initialized 2006.08.21 15:14:00 LOG5[2520:2560]: Negotiations for connect (client side) started 2006.08.21 15:14:00 LOG7[2520:2560]: -> CONNECT xyz.xyz.com:443 HTTP/1.1 Alan R. Hutchison 515-362-1272 -----Message Disclaimer----- This e-mail message is intended only for the use of the individual or entity to which it is addressed, and may contain information that is privileged, confidential and exempt from disclosure under applicable law. If you are not the intended recipient, any dissemination, distribution or copying of this communication is strictly prohibited. If you have received this communication in error, please notify us immediately by reply email to Connect(a)principal.com and delete or destroy all copies of the original message and attachments thereto. Email sent to or from the Principal Financial Group or any of its member companies may be retained as required by law or regulation. Nothing in this message is intended to constitute an Electronic signature for purposes of the Uniform Electronic Transactions Act (UETA) or the Electronic Signatures in Global and National Commerce Act ("E-Sign") unless a specific statement to the contrary is included in this message. While this communication may be used to promote or market a transaction or an idea that is discussed in the publication, it is intended to provide general information about the subject matter covered and is provided with the understanding that The Principal is not rendering legal, accounting, or tax advice. It is not a marketed opinion and may not be used to avoid penalties under the Internal Revenue Code. You should consult with appropriate counsel or other advisors on all matters pertaining to legal, tax, or accounting obligations and requirements.

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limit connections per certificate
by Eric H. Jung 14 Aug '06

14 Aug '06

Hi, I'd like to limit the number of connections to stunnel (in server mode) by client certificate. In other words, I want all clients to only have 1 open socket connection to the server at a time. Is this possible with stunnel out-of-the-box, or must I write a patch to handle it? Thank you, grimholtz

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stunnel through xinetd: process not terminating after use
by Alex Forrow 07 Aug '06

07 Aug '06

Hi, Im using stunnel through xinetd to forward some local unencrypted ldap connections to our ssl ldap server. Seems to work ok but after each use the stunnel process does not terminate, so I end up with losts of processes not doing anything. After a few days, these processes reach a limit and connections fail. As you can see, the connection has finished, but the process still exists: [root@lynx stunnel]# ps -e | grep stunnel 2396 ? 00:00:00 stunnel 2517 ? 00:00:00 stunnel 2575 ? 00:00:00 stunnel 2576 ? 00:00:00 stunnel [root@lynx stunnel]# netstat -p | grep stunnel tcp 0 0 lynx.seekit.co.uk:ldaplo lynx.seekit.co.uk:60390 CLOSE_WAIT 2396/stunnel unix 2 [ ] DGRAM 3204569 2576/stunnel unix 2 [ ] DGRAM 3204562 2575/stunnel unix 2 [ ] DGRAM 3203127 2517/stunnel unix 2 [ ] DGRAM 3202108 2396/stunnel Heres the xinetd configuration for stunnel (/etc/xinetd.d/ldaplo): # default: on # description: Stunnel to connect to LDAP for an insecure local session service ldaplo { disable = no #flags = REUSE port = 390 socket_type = stream wait = no user = nobody server = /usr/sbin/stunnel server_args = /etc/stunnel/ldap.conf # log_on_failure += USERID } Heres the stunnel configuration file (/etc/stunnel/ldap.conf): client = yes connect = 636 Cheers, Alex Forrow

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Stunnel without certificates
by Shane 04 Aug '06

04 Aug '06

Hi, I am new to this group and also to Stunnel utility. I would like to use Stunnel to secure my http connections. Here is a twist. I just want to encrypt the link and don't bother much about the authentication. 1. Can I use Stunnel without certificates? 2. If certificate is mandatory, can I use only the file which contains "keys" but not use other authentication credentials? 3. Can I use anonymous DH Ciphers so that authentication phase is assumed done and both client and servers generate the keys? Any help and guidance will useful. Thanks, -Ravi Joshi __________________________________________________ Do You Yahoo!? Tired of spam? Yahoo! Mail has the best spam protection around http://mail.yahoo.com

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TIMEOUTbusy
by Martin Beauchamp 02 Aug '06

02 Aug '06

Hi List, I'm running Stunnel 4.15 under win32 in client mode. Can someone give me a better idea about what TIMEOUTbusy does? The docs state that it is "time to wait for expected data." But what does Stunnel do after this period? Does it disconnect from the remote server? Does it attempt another SSL session after some interval? Thanks for any addition information! Martin -- Martín Beauchamp Systems Engineer Park Slope Food Coop, Inc. (718) 783-2187 (718) 622-5685 Fax

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stunnel crashing on connect
by Kevin King 24 Jul '06

24 Jul '06

Hi, I am attempting to run stunnel on Windows XP Pro but it is crashing as soon as anything connects to it. I am using it to create a secure TLS tunnel in front of an SMTP mail server and from what I read I should be able to do this and stunnel will handle the STARTLS commands. I downloaded the following windows binary: 562589 Mar 11 13:02:35 2006 stunnel-4.15-installer.exe I made minimal changes to stunnel.conf: 1) added the line "protocol = smtp" 2) uncommented the debug lines (still crashes if I leave these lines alone) I then start stunnel, either as a service or from cmd line - same thing happens >From a command prompt I then "telnet localhost 465" and send "EHLO mydomain.com hi" Stunnel responds with "250-EHLO mydomain.com hi Welcome". I am also running hMailServer on the same machine listening on port 25. It looks like stunnel is forwarded the initial EHLO to hMailServer, then hMailServer responds correctly and stunnel forwards that response back to me. Then stunnel crashes immediatly. Following is the log: 2006.07.20 10:28:41 LOG7[112:1656]: RAND_status claims sufficient entropy for the PRNG 2006.07.20 10:28:41 LOG6[112:1656]: PRNG seeded successfully 2006.07.20 10:28:41 LOG7[112:1656]: Certificate: stunnel.pem 2006.07.20 10:28:41 LOG7[112:1656]: Key file: stunnel.pem 2006.07.20 10:28:41 LOG7[112:1656]: SSL context initialized for service pop3s 2006.07.20 10:28:41 LOG7[112:1656]: Certificate: stunnel.pem 2006.07.20 10:28:41 LOG7[112:1656]: Key file: stunnel.pem 2006.07.20 10:28:41 LOG7[112:1656]: SSL context initialized for service imaps 2006.07.20 10:28:41 LOG7[112:1656]: Certificate: stunnel.pem 2006.07.20 10:28:41 LOG7[112:1656]: Key file: stunnel.pem 2006.07.20 10:28:41 LOG7[112:1656]: SSL context initialized for service ssmtp 2006.07.20 10:28:41 LOG5[112:1656]: stunnel 4.15 on x86-pc-mingw32-gnu with OpenSSL 0.9.7i 14 Oct 2005 2006.07.20 10:28:41 LOG5[112:1656]: Threading:WIN32 SSL:ENGINE Sockets:SELECT,IPv6 2006.07.20 10:28:41 LOG5[112:2564]: No limit detected for the number of clients 2006.07.20 10:28:41 LOG7[112:2564]: FD 1884 in non-blocking mode 2006.07.20 10:28:41 LOG7[112:2564]: SO_REUSEADDR option set on accept socket 2006.07.20 10:28:41 LOG7[112:2564]: pop3s bound to 0.0.0.0:995 2006.07.20 10:28:41 LOG7[112:2564]: FD 1872 in non-blocking mode 2006.07.20 10:28:41 LOG7[112:2564]: SO_REUSEADDR option set on accept socket 2006.07.20 10:28:41 LOG7[112:2564]: imaps bound to 0.0.0.0:993 2006.07.20 10:28:41 LOG7[112:2564]: FD 1864 in non-blocking mode 2006.07.20 10:28:41 LOG7[112:2564]: SO_REUSEADDR option set on accept socket 2006.07.20 10:28:41 LOG7[112:2564]: ssmtp bound to 0.0.0.0:465 2006.07.20 10:28:59 LOG7[112:2564]: ssmtp accepted FD=1840 from 127.0.0.1:1543 2006.07.20 10:28:59 LOG7[112:2564]: Creating a new thread 2006.07.20 10:28:59 LOG7[112:2564]: New thread created 2006.07.20 10:28:59 LOG7[112:2936]: ssmtp started 2006.07.20 10:28:59 LOG7[112:2936]: FD 1840 in non-blocking mode 2006.07.20 10:28:59 LOG7[112:2936]: TCP_NODELAY option set on local socket 2006.07.20 10:28:59 LOG5[112:2936]: ssmtp connected from 127.0.0.1:1543 2006.07.20 10:28:59 LOG7[112:2936]: FD 1812 in non-blocking mode 2006.07.20 10:28:59 LOG7[112:2936]: ssmtp connecting 127.0.0.1:25 2006.07.20 10:28:59 LOG7[112:2936]: connect_wait: waiting 10 seconds 2006.07.20 10:28:59 LOG7[112:2936]: connect_wait: connected 2006.07.20 10:28:59 LOG7[112:2936]: Remote FD=1812 initialized 2006.07.20 10:28:59 LOG7[112:2936]: TCP_NODELAY option set on remote socket 2006.07.20 10:28:59 LOG5[112:2936]: Negotiations for smtp (server side) started 2006.07.20 10:28:59 LOG7[112:2936]: RFC 2487 detected 2006.07.20 10:28:59 LOG7[112:2936]: <- 220 hmailserver ESMTP 2006.07.20 10:28:59 LOG7[112:2936]: -> 220220 hmailserver ESMTP + stunnel 2006.07.20 10:29:09 LOG7[112:2936]: <- EHLO mydomain.com hi 2006.07.20 10:29:09 LOG7[112:2936]: -> 250-EHLO mydomain.com hi Welcome Here is the output of stunnel -version: stunnel 4.15 on x86-pc-mingw32-gnu with OpenSSL 0.9.7i 14 Oct 2005 Threading:WIN32 SSL:ENGINE Sockets:SELECT,IPv6 Global options debug = 5 RNDbytes = 64 RNDoverwrite = yes service = stunnel taskbar = yes Service-level options cert = stunnel.pem ciphers = ALL:!ADH:+RC4:@STRENGTH key = stunnel.pem session = 300 seconds TIMEOUTbusy = 300 seconds TIMEOUTclose = 60 seconds TIMEOUTconnect = 10 seconds TIMEOUTidle = 43200 seconds verify = none 2006.07.20 10:25:04 LOG3[3256:3456]: Server is down I tried building the source and debugging it but I only found some batch files refering to the MS embedded compiler. Why would I want to compile this for an embedded or mobile device? That is what that compiler is for. What makefile or compiler should I be using on windows if I wish to build stunnel on windows? Which I would rather not have to do, I would like to just use the binary but it is crashing before I ever get a chance to test it. Any help would greatly be appreciated. thanks, -Kevin

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stunnel version issue?
by NobbyNoMates 22 Jul '06

22 Jul '06

Dear all - I am trying to set up an stunnel connection on an Ubuntu Dapper box. This system seems to give me (stunnel -V) : stunnel 3.26 on i486-pc-linux-gnu PTHREAD+LIBWRAP with OpenSSL 0.9.8a 11 Oct 2005 and no matter where I look. I cannot seem to find an option to specify a config file when starting stunnel. Unfortunately, the instructions which I have received for setting up my (Direct Connect) client, contain such a config file which is supposed to be needed. It contains the following: client = yes delay = yes output = stunnel.log debug = notice pid = stunnel.pid [DC Server] connect = server.address.org:AAAAA accept = 127.0.0.1:BBBBB where of course the AAAA and BBBB are port numbers. Now I wonder if there is any way to make my stunnel version function in the specified way without the config file? Or is there some alternative way to specify this kind of config? Any suggestion would be much appreciated! Best regards, Erik

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Clearer and Detailed version of the mail Stunnel for HTTP encription
by LoopBack Inc 20 Jul '06

20 Jul '06

Hello. I rewrote some parts of the question, and illustrated it by a small ASCII picture to clearifiy the whole situation. I don't know why I haven't got a single answer, because over 350 people are subscribed to the list, so I hope that I'll get some help now. It would be grateful. I use SocksCap to forward the iexplore cnnections to another port, a port on which stunnel listens. On PC1, the client, stunnel is listening on port 500. So when I start iexplore.exe with SocksCap every connection goes to 127.0.0.1:500. PC1 connects to PC2, with connect = 192.168.0.2:123 On PC2, the server, stunnel listens on port 500. then is connects to the internet with connect = 127.0.0.1:80. Here is the problem, stunnel doesn't connect to the internet over 127.0.0.1:80. I don't know why, but it doesnt. ---Stunnel.conf SERVER--- .. [inet] accept = 127.0.0.1:123 connect = 127.0.0.1:80 ---Stunnel.conf CLIENT--- .. [inet] accept = 127.0.0.1:500 connect = 192.168.0.2:123 LOGs from the SERVER: 2006.07.18 16:56:07 LOG7[2332:2720]: inet accepted FD=208 from 192.168.0.1:2156 2006.07.18 16:56:07 LOG7[2332:2720]: Creating a new thread 2006.07.18 16:56:07 LOG7[2332:2720]: New thread created 2006.07.18 16:56:07 LOG7[2332:1880]: inet started 2006.07.18 16:56:07 LOG7[2332:1880]: FD 208 in non-blocking mode 2006.07.18 16:56:07 LOG5[2332:1880]: inet connected from 192.168.0.1:2156 2006.07.18 16:56:07 LOG7[2332:1880]: SSL state (accept): before/accept initialization 2006.07.18 16:56:07 LOG7[2332:1880]: SSL state (accept): SSLv3 read client hello A 2006.07.18 16:56:07 LOG7[2332:1880]: SSL state (accept): SSLv3 write server hello A 2006.07.18 16:56:07 LOG7[2332:1880]: SSL state (accept): SSLv3 write change cipher spec A 2006.07.18 16:56:07 LOG7[2332:1880]: SSL state (accept): SSLv3 write finished A 2006.07.18 16:56:07 LOG7[2332:1880]: SSL state (accept): SSLv3 flush data 2006.07.18 16:56:07 LOG7[2332:1880]: SSL state (accept): SSLv3 read finished A 2006.07.18 16:56:07 LOG7[2332:1880]: 1 items in the session cache 2006.07.18 16:56:07 LOG7[2332:1880]: 0 client connects (SSL_connect()) 2006.07.18 16:56:07 LOG7[2332:1880]: 0 client connects that finished 2006.07.18 16:56:07 LOG7[2332:1880]: 0 client renegotiations requested 2006.07.18 16:56:07 LOG7[2332:1880]: 7 server connects (SSL_accept()) 2006.07.18 16:56:07 LOG7[2332:1880]: 7 server connects that finished 2006.07.18 16:56:07 LOG7[2332:1880]: 0 server renegotiations requested 2006.07.18 16:56:07 LOG7[2332:1880]: 5 session cache hits 2006.07.18 16:56:07 LOG7[2332:1880]: 1 session cache misses 2006.07.18 16:56:07 LOG7[2332:1880]: 1 session cache timeouts 2006.07.18 16:56:07 LOG6[2332:1880]: SSL accepted: previous session reused 2006.07.18 16:56:07 LOG7[2332:1880]: FD 244 in non-blocking mode 2006.07.18 16:56:07 LOG7[2332:1880]: inet connecting 127.0.0.1:80 2006.07.18 16:56:07 LOG7[2332:1880]: connect_wait: waiting 10 seconds 2006.07.18 16:56:07 LOG7[2332:1880]: connect_wait: connected 2006.07.18 16:56:07 LOG7[2332:1880]: Remote FD=244 initialized After nothing happend for 52 seconds I aborted in the iexplore.exe to open the page. 2006.07.18 16:56:59 LOG7[2332:1880]: SSL alert (read): warning: close notify 2006.07.18 16:56:59 LOG7[2332:1880]: SSL closed on SSL_read 2006.07.18 16:56:59 LOG7[2332:1880]: Socket write shutdown 2006.07.18 16:56:59 LOG7[2332:1880]: SSL write shutdown 2006.07.18 16:56:59 LOG7[2332:1880]: SSL alert (write): warning: close notify 2006.07.18 16:56:59 LOG6[2332:1880]: SSL_shutdown successfully sent close_notify 2006.07.18 16:56:59 LOG5[2332:1880]: Connection closed: 0 bytes sent to SSL, 3 bytes sent to socket 2006.07.18 16:56:59 LOG7[2332:1880]: inet finished (0 left) LOGs from the CLIENT: 2006.07.18 17:10:11 LOG7[1756:4756]: inet accepted FD=444 from 127.0.0.1:2284 2006.07.18 17:10:11 LOG7[1756:4756]: Creating a new thread 2006.07.18 17:10:11 LOG7[1756:4756]: New thread created 2006.07.18 17:10:11 LOG7[1756:2840]: inet started 2006.07.18 17:10:11 LOG7[1756:2840]: FD 444 in non-blocking mode 2006.07.18 17:10:11 LOG7[1756:2840]: TCP_NODELAY option set on local socket 2006.07.18 17:10:11 LOG5[1756:2840]: inet connected from 127.0.0.1:2284 2006.07.18 17:10:11 LOG7[1756:2840]: FD 348 in non-blocking mode 2006.07.18 17:10:11 LOG7[1756:2840]: inet connecting 192.168.0.2:123 2006.07.18 17:10:11 LOG7[1756:2840]: connect_wait: waiting 10 seconds 2006.07.18 17:10:11 LOG7[1756:2840]: connect_wait: connected 2006.07.18 17:10:11 LOG7[1756:2840]: Remote FD=348 initialized 2006.07.18 17:10:11 LOG7[1756:2840]: TCP_NODELAY option set on remote socket 2006.07.18 17:10:11 LOG7[1756:2840]: SSL state (connect): before/connect initialization 2006.07.18 17:10:11 LOG7[1756:2840]: SSL state (connect): SSLv3 write client hello A 2006.07.18 17:10:11 LOG7[1756:2840]: SSL state (connect): SSLv3 read server hello A 2006.07.18 17:10:11 LOG7[1756:2840]: SSL state (connect): SSLv3 read finished A 2006.07.18 17:10:11 LOG7[1756:2840]: SSL state (connect): SSLv3 write change cipher spec A 2006.07.18 17:10:11 LOG7[1756:2840]: SSL state (connect): SSLv3 write finished A 2006.07.18 17:10:11 LOG7[1756:2840]: SSL state (connect): SSLv3 flush data 2006.07.18 17:10:11 LOG7[1756:2840]: 17 items in the session cache 2006.07.18 17:10:11 LOG7[1756:2840]: 65 client connects (SSL_connect()) 2006.07.18 17:10:11 LOG7[1756:2840]: 65 client connects that finished 2006.07.18 17:10:11 LOG7[1756:2840]: 0 client renegotiations requested 2006.07.18 17:10:11 LOG7[1756:2840]: 0 server connects (SSL_accept()) 2006.07.18 17:10:11 LOG7[1756:2840]: 0 server connects that finished 2006.07.18 17:10:11 LOG7[1756:2840]: 0 server renegotiations requested 2006.07.18 17:10:11 LOG7[1756:2840]: 48 session cache hits 2006.07.18 17:10:11 LOG7[1756:2840]: 0 session cache misses 2006.07.18 17:10:11 LOG7[1756:2840]: 0 session cache timeouts 2006.07.18 17:10:11 LOG6[1756:2840]: SSL connected: previous session reused Nothing happendend, I aborted iexplore.exe 2006.07.18 17:10:25 LOG7[1756:2840]: Socket closed on read 2006.07.18 17:10:25 LOG7[1756:2840]: SSL write shutdown 2006.07.18 17:10:25 LOG7[1756:2840]: SSL alert (write): warning: close notify 2006.07.18 17:10:25 LOG7[1756:2840]: SSL_shutdown retrying 2006.07.18 17:10:25 LOG7[1756:2840]: SSL doesn't need to read or write 2006.07.18 17:10:25 LOG7[1756:2840]: SSL alert (read): warning: close notify 2006.07.18 17:10:26 LOG7[1756:2840]: SSL closed on SSL_read 2006.07.18 17:10:26 LOG7[1756:2840]: Socket write shutdown 2006.07.18 17:10:26 LOG5[1756:2840]: Connection closed: 3 bytes sent to SSL, 0 bytes sent to socket 2006.07.18 17:10:26 LOG7[1756:2840]: inet finished (0 left) So the problem is that stunnel doesn't connect to the internet on PC2. I think i have to use something different than connect = 127.0.0.1:80 on PC2, but not sure. The version of stunnel is 4.15 I'm using Windows. _________________________________________________________________ Express yourself instantly with MSN Messenger! Download today - it's FREE! http://messenger.msn.click-url.com/go/onm00200471ave/direct/01/

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