- stunnel-users - stunnel.org

how to sign each pem file with the local CA
by Jonathan Carpenter 21 Oct '05

21 Oct '05

I am trying to setup stunnel to encrypt syslog-ng logs, but all the tutorials that I have found tell me to sign each pem file with the local CA I have tried to find out how in the stunnel archives but have had no luck. Can anyone help me? Thanks

1 0

Stunnel Configure Warning
by G J Piper 21 Oct '05

21 Oct '05

I was upgrading my Stunnel 4.11 to 4.13 when I saw this in the config check and decided to post it to see if I should continue installing... the config told me (obvoiously) to post this message... heh: > checking ucontext.h usability... no > checking ucontext.h presence... yes > configure: WARNING: ucontext.h: present but cannot be compiled > configure: WARNING: ucontext.h: check for missing prerequisite headers? > configure: WARNING: ucontext.h: see the Autoconf documentation > configure: WARNING: ucontext.h: section "Present But Cannot Be Compiled" > configure: WARNING: ucontext.h: proceeding with the preprocessor's result > configure: WARNING: ucontext.h: in the future, the compiler will take precedence > configure: WARNING: ## ---------------------------------- ## > configure: WARNING: ## Report this to the stunnel lists. ## > configure: WARNING: ## ---------------------------------- ## > checking for ucontext.h... yes > checking pthread.h usability... yes > checking pthread.h presence... yes > checking for pthread.h... yes What can be done? ~ Greg

2 1

stunnel 4.13 released
by Michal Trojnara 21 Oct '05

21 Oct '05

Version 4.13, 2005.10.21, urgency: MEDIUM: * DLLs for OpenSSL 0.9.7i included because protection faults were reported in 0.9.8 and 0.9.8a. * New features - Libwrap code is executed as a separate process (no more delays due to a global and potentially long critical section). * Bugfixes - Problem with zombies in UCONTEXT threading fixed. - Workaround for non-standard makecontext() uc_stack.ss_sp parameter semantics on SGI IRIX. - Protection fault in signals handling on IRIX fixed. - Problem finding pthread library on AIX fixed. - size_t printf() fixed in stack_info() (the previous fix didn't work). - socklen_t is used instead of int where required. Homepage: http://stunnel.mirt.net/ sha1sum for stunnel-4.13.tar.gz: 4cb8e162e6cd4b4a966d601d1c890df2c2ee198f Best regards, Mike

1 0

smtp and tls
by Andy Cravens 21 Oct '05

21 Oct '05

Does stunnel support using TLS with SMTP? My SMTP server requires TLS but my client does not support it. Unfortunately, my SMTP server does not support SMTP over SSL so my only choice is to use TLS. I've seen some old threads concerning a patch to stunnel 3.x to do TLS but I read it was not a good solution. Does anybody have any information or opinions on this?

3 3

SSL alert (write): fatal: bad record mac
by Huy Vu 21 Oct '05

21 Oct '05

Hi all, I was tried stunnel 4.0.9 compiled with Openssl 0.9.7g on Redhat ES 3.0 and got the telnets sessions disconnected with error messages in stunnel.log as below: SSL alert (write): fatal: bad record mac SSL_read: 1408F455: error:1408F455:SSL routines:SSL3_GET_RECORD:decryption failed or bad record mac The same problem with stunnel 4.0.12 compiled with Openssl 0.9.8a Tried to disable the option socket = a:SO_REUSEADDR=0 in stunne server configuration file but still not help. Thanks in advance for any help: Full stunnel.log: -------------------- 2005.10.21 04:07:33 LOG5[19485:1]: stunnel 4.12 on i686-pc-linux-gnu UCONTEXT+POLL+IPv4+LIBWRAP with OpenSSL 0.9.8a 11 Oct 2005 2005.10.21 04:07:33 LOG7[19485:1]: Snagged 64 random bytes from /dev/urandom 2005.10.21 04:07:33 LOG7[19485:1]: RAND_status claims sufficient entropy for the PRNG 2005.10.21 04:07:33 LOG6[19485:1]: PRNG seeded successfully 2005.10.21 04:07:33 LOG7[19485:1]: Certificate: /usr/local/stunnel/etc/stunnel/stunnel.pem 2005.10.21 04:07:33 LOG7[19485:1]: Key file: /usr/local/stunnel/etc/stunnel/stunnel.pem 2005.10.21 04:07:33 LOG6[19485:1]: file ulimit = 1024 (can be changed with 'ulimit -n') 2005.10.21 04:07:33 LOG6[19485:1]: poll() used - no FD_SETSIZE limit for file descriptors 2005.10.21 04:07:33 LOG5[19485:1]: 500 clients allowed 2005.10.21 04:07:33 LOG7[19485:1]: FD 4 in non-blocking mode 2005.10.21 04:07:33 LOG7[19485:1]: FD 5 in non-blocking mode 2005.10.21 04:07:33 LOG7[19485:1]: FD 6 in non-blocking mode 2005.10.21 04:07:33 LOG7[19485:1]: SO_REUSEADDR option set on accept socket 2005.10.21 04:07:33 LOG7[19485:1]: telnets bound to 192.168.34.35:992 2005.10.21 04:07:33 LOG7[19486:1]: Created pid file /stunnel.pid 2005.10.21 04:07:33 LOG5[19487:1]: stunnel 4.12 on i686-pc-linux-gnu UCONTEXT+POLL+IPv4+LIBWRAP with OpenSSL 0.9.8a 11 Oct 2005 2005.10.21 04:07:33 LOG7[19487:1]: Snagged 64 random bytes from /dev/urandom 2005.10.21 04:07:33 LOG7[19487:1]: RAND_status claims sufficient entropy for the PRNG 2005.10.21 04:07:33 LOG6[19487:1]: PRNG seeded successfully 2005.10.21 04:07:33 LOG6[19487:1]: file ulimit = 1024 (can be changed with 'ulimit -n') 2005.10.21 04:07:33 LOG6[19487:1]: poll() used - no FD_SETSIZE limit for file descriptors 2005.10.21 04:07:33 LOG5[19487:1]: 500 clients allowed 2005.10.21 04:07:33 LOG7[19487:1]: FD 4 in non-blocking mode 2005.10.21 04:07:33 LOG7[19487:1]: FD 5 in non-blocking mode 2005.10.21 04:07:33 LOG7[19487:1]: FD 6 in non-blocking mode 2005.10.21 04:07:33 LOG7[19487:1]: SO_REUSEADDR option set on accept socket 2005.10.21 04:07:33 LOG7[19487:1]: soap bound to 127.0.0.1:44300 2005.10.21 04:07:33 LOG7[19488:1]: Created pid file /stunnel.pid 2005.10.21 04:09:30 LOG7[19486:1]: telnets accepted FD=7 from 65.94.188.47:60677 2005.10.21 04:09:30 LOG7[19486:1]: Creating a new context 2005.10.21 04:09:30 LOG7[19486:1]: Context 2 created 2005.10.21 04:09:30 LOG7[19486:2]: Context swap: 1 -> 2 2005.10.21 04:09:30 LOG7[19486:2]: telnets started 2005.10.21 04:09:30 LOG7[19486:2]: FD 7 in non-blocking mode 2005.10.21 04:09:30 LOG7[19486:2]: TCP_NODELAY option set on local socket 2005.10.21 04:09:30 LOG5[19486:2]: telnets connected from 65.94.188.47:60677 2005.10.21 04:09:30 LOG7[19486:2]: SSL state (accept): before/accept initialization 2005.10.21 04:09:30 LOG7[19486:2]: SSL state (accept): SSLv3 read client hello A 2005.10.21 04:09:30 LOG7[19486:2]: SSL state (accept): SSLv3 write server hello A 2005.10.21 04:09:30 LOG7[19486:2]: SSL state (accept): SSLv3 write certificate A 2005.10.21 04:09:30 LOG7[19486:2]: SSL state (accept): SSLv3 write server done A 2005.10.21 04:09:30 LOG7[19486:2]: SSL state (accept): SSLv3 flush data 2005.10.21 04:09:30 LOG7[19486:2]: SSL state (accept): SSLv3 read client key exchange A 2005.10.21 04:09:30 LOG7[19486:2]: SSL state (accept): SSLv3 read finished A 2005.10.21 04:09:30 LOG7[19486:2]: SSL state (accept): SSLv3 write change cipher spec A 2005.10.21 04:09:30 LOG7[19486:2]: SSL state (accept): SSLv3 write finished A 2005.10.21 04:09:30 LOG7[19486:2]: SSL state (accept): SSLv3 flush data 2005.10.21 04:09:30 LOG7[19486:2]: 1 items in the session cache 2005.10.21 04:09:30 LOG7[19486:2]: 0 client connects (SSL_connect()) 2005.10.21 04:09:30 LOG7[19486:2]: 0 client connects that finished 2005.10.21 04:09:30 LOG7[19486:2]: 0 client renegotiatations requested 2005.10.21 04:09:30 LOG7[19486:2]: 1 server connects (SSL_accept()) 2005.10.21 04:09:30 LOG7[19486:2]: 1 server connects that finished 2005.10.21 04:09:30 LOG7[19486:2]: 0 server renegotiatiations requested 2005.10.21 04:09:30 LOG7[19486:2]: 0 session cache hits 2005.10.21 04:09:30 LOG7[19486:2]: 0 session cache misses 2005.10.21 04:09:30 LOG7[19486:2]: 0 session cache timeouts 2005.10.21 04:09:30 LOG6[19486:2]: SSL accepted: new session negotiated 2005.10.21 04:09:30 LOG6[19486:2]: Negotiated ciphers: RC4-MD5 SSLv3 Kx=RSA Au=RSA Enc=RC4(128) Mac=MD5 2005.10.21 04:09:30 LOG7[19486:2]: FD 8 in non-blocking mode 2005.10.21 04:09:30 LOG7[19486:2]: telnets connecting 127.0.0.1:23 2005.10.21 04:09:30 LOG7[19486:2]: connect_wait: waiting 10 seconds 2005.10.21 04:09:30 LOG7[19486:2]: connect_wait: connected 2005.10.21 04:09:30 LOG7[19486:2]: Remote FD=8 initialized 2005.10.21 04:09:30 LOG7[19486:2]: TCP_NODELAY option set on remote socket 2005.10.21 04:09:31 LOG7[19488:1]: soap accepted FD=7 from 127.0.0.1:37120 2005.10.21 04:09:31 LOG7[19488:1]: Creating a new context 2005.10.21 04:09:31 LOG7[19488:1]: Context 2 created 2005.10.21 04:09:31 LOG7[19488:2]: Context swap: 1 -> 2 2005.10.21 04:09:31 LOG7[19488:2]: soap started 2005.10.21 04:09:31 LOG7[19488:2]: FD 7 in non-blocking mode 2005.10.21 04:09:31 LOG7[19488:2]: TCP_NODELAY option set on local socket 2005.10.21 04:09:31 LOG5[19488:2]: soap connected from 127.0.0.1:37120 2005.10.21 04:09:31 LOG7[19488:2]: FD 8 in non-blocking mode 2005.10.21 04:09:31 LOG7[19488:2]: soap connecting 199.84.230.35:443 2005.10.21 04:09:31 LOG7[19488:2]: connect_wait: waiting 10 seconds 2005.10.21 04:09:31 LOG7[19488:2]: connect_wait: connected 2005.10.21 04:09:31 LOG7[19488:2]: Remote FD=8 initialized 2005.10.21 04:09:31 LOG7[19488:2]: TCP_NODELAY option set on remote socket 2005.10.21 04:09:31 LOG7[19488:2]: SSL state (connect): before/connect initialization 2005.10.21 04:09:31 LOG7[19488:2]: SSL state (connect): SSLv3 write client hello A 2005.10.21 04:09:31 LOG7[19488:2]: SSL state (connect): SSLv3 read server hello A 2005.10.21 04:09:31 LOG7[19488:2]: SSL state (connect): SSLv3 read server certificate A 2005.10.21 04:09:31 LOG7[19488:2]: SSL state (connect): SSLv3 read server key exchange A 2005.10.21 04:09:31 LOG7[19488:2]: SSL state (connect): SSLv3 read server done A 2005.10.21 04:09:31 LOG7[19488:2]: SSL state (connect): SSLv3 write client key exchange A 2005.10.21 04:09:31 LOG7[19488:2]: SSL state (connect): SSLv3 write change cipher spec A 2005.10.21 04:09:31 LOG7[19488:2]: SSL state (connect): SSLv3 write finished A 2005.10.21 04:09:31 LOG7[19488:2]: SSL state (connect): SSLv3 flush data 2005.10.21 04:09:31 LOG7[19488:2]: SSL state (connect): SSLv3 read finished A 2005.10.21 04:09:31 LOG7[19488:2]: 1 items in the session cache 2005.10.21 04:09:31 LOG7[19488:2]: 1 client connects (SSL_connect()) 2005.10.21 04:09:31 LOG7[19488:2]: 1 client connects that finished 2005.10.21 04:09:31 LOG7[19488:2]: 0 client renegotiatations requested 2005.10.21 04:09:31 LOG7[19488:2]: 0 server connects (SSL_accept()) 2005.10.21 04:09:31 LOG7[19488:2]: 0 server connects that finished 2005.10.21 04:09:31 LOG7[19488:2]: 0 server renegotiatiations requested 2005.10.21 04:09:31 LOG7[19488:2]: 0 session cache hits 2005.10.21 04:09:31 LOG7[19488:2]: 0 session cache misses 2005.10.21 04:09:31 LOG7[19488:2]: 0 session cache timeouts 2005.10.21 04:09:31 LOG6[19488:2]: SSL connected: new session negotiated 2005.10.21 04:09:31 LOG6[19488:2]: Negotiated ciphers: DHE-RSA-AES256-SHA SSLv3 Kx=DH Au=RSA Enc=AES(256) Mac=SHA1 2005.10.21 04:09:31 LOG7[19488:2]: SSL_read returned WANT_READ: retrying 2005.10.21 04:09:31 LOG7[19488:2]: SSL_read returned WANT_READ: retrying 2005.10.21 04:09:31 LOG7[19488:2]: SSL alert (read): warning: close notify 2005.10.21 04:09:31 LOG7[19488:2]: SSL closed on SSL_read 2005.10.21 04:09:31 LOG7[19488:2]: Socket write shutdown 2005.10.21 04:09:31 LOG7[19488:2]: SSL write shutdown 2005.10.21 04:09:31 LOG7[19488:2]: SSL alert (write): warning: close notify 2005.10.21 04:09:31 LOG6[19488:2]: SSL_shutdown successfully sent close_notify 2005.10.21 04:09:31 LOG7[19488:2]: Socket closed on read 2005.10.21 04:09:31 LOG5[19488:2]: Connection closed: 818 bytes sent to SSL, 4558 bytes sent to socket 2005.10.21 04:09:31 LOG7[19488:2]: soap finished (0 left) 2005.10.21 04:09:31 LOG5[19488:2]: stack_info: size=65536, current=9560 (14%), maximum=9560 (14%) 2005.10.21 04:09:31 LOG7[19488:2]: Context 2 closed 2005.10.21 04:09:45 LOG7[19486:2]: SSL alert (write): fatal: bad record mac 2005.10.21 04:09:45 LOG3[19486:2]: SSL_read: 1408F455: error:1408F455:SSL routines:SSL3_GET_RECORD:decryption failed or bad record mac 2005.10.21 04:09:45 LOG5[19486:2]: Connection reset: 4313 bytes sent to SSL, 232 bytes sent to socket 2005.10.21 04:09:45 LOG7[19486:2]: telnets finished (0 left) 2005.10.21 04:09:45 LOG5[19486:2]: stack_info: size=65536, current=9560 (14%), maximum=9560 (14%) 2005.10.21 04:09:45 LOG7[19486:2]: Context 2 closed _________________________________________________________________ Take 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1 0

ECC-enabled version of Stunnel
by Dennis Laupichler 19 Oct '05

19 Oct '05

Hello, I want to use a ECC-certificate for stunnel.pem, but it doesn't work. Can anybody help me, what I have to do, to use Elliptique Curve cryptography certificates in Stunnel? Is it still possible or not? The ECC-Ciphers "ECDH-ECDSA-AES256-SHA" from openssl 0.9.8 works, but when I loaded the certificate into stunnel, there was follow messages in the log-file: stunnel.log in Server ################## error stack: 140B3009 : error:140B3009:SSL routines:SSL_CTX_use_RSAPrivateKey_file:PEM lib SSL_CTX_use_RSAPrivateKey_file: 607907F: error:0607907F:digital envelope routines:EVP_PKEY_get1_RSA:expecting an rsa key Server is down ################## Thanks, Dennis

2 1

Lost Connection to MySQL
by Dave.Wismer＠faa.gov 18 Oct '05

18 Oct '05

1 0

stunnel silently dies
by Uffe Vedenbrant 18 Oct '05

18 Oct '05

Hi! After using stunnel on several freebsd boxes i decided to try it out on my mailserver.. Unfortunately it silently died after first connection.. ( and with exitcode=0 ) debug = 7 Nothing more in the log than startup + a line about a incomming connection on port 9143.. ( where i put my incomming imap ) Nothing in any log on the box.. Ok.. It might be my openssl freebsd version or stunnel version so i started to upgrade everything.. Freebsd 4.4 -> 4.11 stunnel 4.05 -> 4.11 etc.. Well did it work.. Nop..;-) Finally i found out after tryin ktrace that the problem was that the tcpwrapper code killed me.. That's ok but there where no logging at all that the tcpwrapper silently decided that i was comming from a blocked host.. It's up now without tcpwrapper enabled and works perfect..;-) Is there any possibility to have stunnel to say something about tcpwrapper problems..;-) And not just die..;-) Regards /Uffe

4 9

client and server together?
by Sholund, Mark D, GVSOL 18 Oct '05

18 Oct '05

I have a situation in which I have a client system, a middle-tier application server, and a backend database. The middle-tier takes info from the client and sends requests to the database, in other words the middle-tier has to act as both a client and a server in different parts of a transaction. Is it necessary that I run two instances of stunnel, one with an stunnel-client.conf wherein client=yes and another instance with stunnel-server.conf wherein client=no or is it possible to configure a single stunnel to do this? I would guess it would be kind of like having "client=yes|no" at the service level; this is not an option as far as I can see from the man page for 4.12 but I figured I could at least ask.

3 2

Windows XP, 2000 Crash on VNC over stunnel
by prez2＠o2.pl 15 Oct '05

15 Oct '05

Hello I've got problem with vnc over stunnel, stunnel on client computer crashes all the time. I did all configuration according to information at http://www.securityfocus.com/infocus/1677. Stunnel v 4.12, VNC version 4.1.1, all firewalls off, all computers in the same LAN. Tried on Windows XP SP2 and Windows 2000, on both of them there was a crash. All necessery (at least I think so) information are here: http://users.vlo.ids.gda.pl/~piotr/client.txt http://users.vlo.ids.gda.pl/~piotr/server.txt http://users.vlo.ids.gda.pl/~piotr/windows.txt Thank you in advance

3 2

Re: [stunnel-users] Windows XP, 2000 Crash on VNC over stunnel
by prez2＠o2.pl 14 Oct '05

14 Oct '05

> > I've got problem with vnc over stunnel, stunnel on client computer > > crashes all the time. > Did you try to upgrade DLLs to the latest version: > ftp://stunnel.mirt.net/stunnel/openssl/binary-0.9.8a-zdll/ I did upgrade librabries on both server and client, unfortunately it didn't help - theres is still a crash. Should I generate certifcates again? Meantime, I did configure it on my Ubuntu 10 X box, and manage to connect with server, so I guess server configuration is ok. Thanks for help. Best regards.

2 1

ECC-enabled version of Stunnel
by Dennis Laupichler 13 Oct '05

13 Oct '05

Dear Sirs, I want to use a ECC-certificate for stunnel.pem, but it doesn't work. Can you tell me, what I have to do, to use Elliptique Curve cryptography certificates in Stunnel? Is it still possible or not? The ECC-Ciphers "ECDH-ECDSA-AES256-SHA" from openssl 0.9.8 works, but when I loaded the certificate into stunnel, there was follow messages in the log-file: stunnel.log in Server ################## error stack: 140B3009 : error:140B3009:SSL routines:SSL_CTX_use_RSAPrivateKey_file:PEM lib SSL_CTX_use_RSAPrivateKey_file: 607907F: error:0607907F:digital envelope routines:EVP_PKEY_get1_RSA:expecting an rsa key Server is down ################## Best regards, Dennis

1 0

IMAP TLS support in stunnel 4?
by George Hartzell 12 Oct '05

12 Oct '05

Hi All, I'd like to put stunnel in front of dbmail-imap and dbmail-pop, since they don't offer any encryption. I understand I can just do straight ssl connections, but would like [prefer] to support TLS. I've found patches to the stunnel 3 series that implement TLS for IMAP, but haven't found any for version 4. Has someone implemented it for 4? Is there a technical or political reason/problem, or just not enough round-tuits? Thanks, g.

3 3

404 File Not Found when accessing webservice using STunnel (works fine without STunnel)
by Sundell Staffan 10 Oct '05

10 Oct '05

"stunnel 4.08 on x86-pc-mingw32-gnu WIN32+IPv6 with OpenSSL 0.9.7e 25 Oct 2004" Hi, this is my first try with both SSL & STunnel, so please excuse me for any missunderstandings a.s.o. I have problems running a STunnel in client-mode agains a SSL webservice. Our application does not support clientside-certificates, so i want to use STunnel to handle the SSL connection. For now, our webservice-provider has disabled the need for client-certificates (to help us narrow our problem down) But it still dont work. As a first step, i access whe webservice default-page through IE-Explorer. https://<ip>:3001/<path> and i am presented with the default-webpage. As i second step, i start stunnel with following .conf verify = 2 CApath = <path where i have saved all certificates as .pem:s with <hash>.0 filenames, from the direct-access example with explorer above> debug = 7 client = yes [https] accept = 127.0.0.1:3000 connect = <ip>:3001 TIMEOUTclose = 0 and try to access http://127.0.0.1:3000/<path> but i get: HTTP 404 File Not found. I have tried the same approach against a microsoft webservice at: https://test.uddi.microsoft.com/extension.asmx Without any problems. 1. I see no errors in the log, as i understand it (se below) can any one else with a more skilled eye see any problem ? 2. Our webservice-provider has an invalid hostname in its certificate (no public hostname, just IP during testing, but server certificate state www.fora.se) might that cause a problem ? (i have tried localy with invalid hostname in certificate without any problem though) 3. Is it possible to enable/disable verification of hostname in STunnel ? (as i understand it, the "verify" option in the STunnel.conf concerns the whole certificate-validation-process, and not just the hostname validation ?) 4. Could the problem be a config-issue on the webservice-provider end ? Im not sure, as it works with IE-Explorer, but not through STunnel ? 5. Any clue on where to look would be greatly apriciated, i have been working with this for a week, and i have been able to use STunnel both as server & client, with & without client-certs against everything i have tested localy and public (tried between diffrent home-made applications, on a local webserver, against verisign website a.s.o.) and everything works fine, except where i need it to work (against our webservice-provider). Regards /Staffan Sundell STunnel log against our webservice-provider (when it doesnt work): 2005.10.10 16:50:23 LOG5[2760:2800]: stunnel 4.08 on x86-pc-mingw32-gnu WIN32+IPv6 with OpenSSL 0.9.7e 25 Oct 2004 2005.10.10 16:50:23 LOG7[2760:2332]: RAND_status claims sufficient entropy for the PRNG 2005.10.10 16:50:23 LOG6[2760:2332]: PRNG seeded successfully 2005.10.10 16:50:23 LOG7[2760:2332]: Verify directory set to w:\ws\certs 2005.10.10 16:50:23 LOG5[2760:2332]: No limit detected for the number of clients 2005.10.10 16:50:23 LOG7[2760:2332]: FD 1916 in non-blocking mode 2005.10.10 16:50:23 LOG7[2760:2332]: SO_REUSEADDR option set on accept socket 2005.10.10 16:50:23 LOG7[2760:2332]: https bound to 127.0.0.1:3000 2005.10.10 16:50:28 LOG7[2760:2332]: https accepted FD=1904 from 127.0.0.1:2975 2005.10.10 16:50:28 LOG7[2760:2332]: FD 1904 in non-blocking mode 2005.10.10 16:50:28 LOG7[2760:2332]: Creating a new thread 2005.10.10 16:50:28 LOG7[2760:2332]: New thread created 2005.10.10 16:50:28 LOG7[2760:3748]: https started 2005.10.10 16:50:28 LOG5[2760:3748]: https connected from 127.0.0.1:2975 2005.10.10 16:50:28 LOG7[2760:3748]: FD 1876 in non-blocking mode 2005.10.10 16:50:28 LOG7[2760:3748]: https connecting <webserviceprovider ip>:3001 2005.10.10 16:50:28 LOG7[2760:3748]: connect_wait: waiting 10 seconds 2005.10.10 16:50:28 LOG7[2760:3748]: connect_wait: connected 2005.10.10 16:50:28 LOG7[2760:3748]: Remote FD=1876 initialized 2005.10.10 16:50:28 LOG7[2760:3748]: SSL state (connect): before/connect initialization 2005.10.10 16:50:28 LOG7[2760:3748]: SSL state (connect): SSLv3 write client hello A 2005.10.10 16:50:28 LOG7[2760:3748]: SSL state (connect): SSLv3 read server hello A 2005.10.10 16:50:28 LOG5[2760:3748]: VERIFY OK: depth=2, /C=US/O=VeriSign, Inc./OU=Class 3 Public Primary Certification Authority 2005.10.10 16:50:28 LOG5[2760:3748]: VERIFY OK: depth=1, /O=VeriSign Trust Network/OU=VeriSign, Inc./OU=VeriSign International Server CA - Class 3/OU=www.verisign.com/CPS Incorp.by Ref. LIABILITY LTD.(c)97 VeriSign 2005.10.10 16:50:28 LOG5[2760:3748]: VERIFY OK: depth=0, /C=SE/L=STOCKHOLM/O=Fora AB/OU=Member, VeriSign Trust Network/OU=Terms of use at www.verisign.se/rpa <http://www.verisign.se/rpa> (c)05/OU=Authenticated by VeriSign/OU=Member, VeriSign Trust Network/CN=www.fora.se 2005.10.10 16:50:28 LOG7[2760:3748]: SSL state (connect): SSLv3 read server certificate A 2005.10.10 16:50:28 LOG7[2760:3748]: SSL state (connect): SSLv3 read server done A 2005.10.10 16:50:28 LOG7[2760:3748]: SSL state (connect): SSLv3 write client key exchange A 2005.10.10 16:50:28 LOG7[2760:3748]: SSL state (connect): SSLv3 write change cipher spec A 2005.10.10 16:50:28 LOG7[2760:3748]: SSL state (connect): SSLv3 write finished A 2005.10.10 16:50:28 LOG7[2760:3748]: SSL state (connect): SSLv3 flush data 2005.10.10 16:50:28 LOG7[2760:3748]: SSL state (connect): SSLv3 read finished A 2005.10.10 16:50:28 LOG7[2760:3748]: 1 items in the session cache 2005.10.10 16:50:28 LOG7[2760:3748]: 1 client connects (SSL_connect()) 2005.10.10 16:50:28 LOG7[2760:3748]: 1 client connects that finished 2005.10.10 16:50:28 LOG7[2760:3748]: 0 client renegotiatations requested 2005.10.10 16:50:28 LOG7[2760:3748]: 0 server connects (SSL_accept()) 2005.10.10 16:50:28 LOG7[2760:3748]: 0 server connects that finished 2005.10.10 16:50:28 LOG7[2760:3748]: 0 server renegotiatiations requested 2005.10.10 16:50:28 LOG7[2760:3748]: 0 session cache hits 2005.10.10 16:50:28 LOG7[2760:3748]: 0 session cache misses 2005.10.10 16:50:28 LOG7[2760:3748]: 0 session cache timeouts 2005.10.10 16:50:28 LOG6[2760:3748]: SSL connected: new session negotiated 2005.10.10 16:50:28 LOG6[2760:3748]: Negotiated ciphers: AES256-SHA SSLv3 Kx=RSA Au=RSA Enc=AES(256) Mac=SHA1 2005.10.10 16:50:45 LOG7[2760:3748]: SSL socket closed on SSL_read 2005.10.10 16:50:45 LOG7[2760:3748]: Socket write shutdown 2005.10.10 16:50:45 LOG5[2760:3748]: Connection closed: 407 bytes sent to SSL, 507 bytes sent to socket 2005.10.10 16:50:45 LOG7[2760:3748]: https finished (0 left) STunnel log against microsoft (where it works) 2005.10.10 16:50:22 LOG5[2940:2556]: stunnel 4.08 on x86-pc-mingw32-gnu WIN32+IPv6 with OpenSSL 0.9.7e 25 Oct 2004 2005.10.10 16:50:22 LOG7[2940:1112]: RAND_status claims sufficient entropy for the PRNG 2005.10.10 16:50:22 LOG6[2940:1112]: PRNG seeded successfully 2005.10.10 16:50:22 LOG7[2940:1112]: Verify directory set to c:\ws\certs 2005.10.10 16:50:22 LOG5[2940:1112]: No limit detected for the number of clients 2005.10.10 16:50:22 LOG7[2940:1112]: FD 136 in non-blocking mode 2005.10.10 16:50:22 LOG7[2940:1112]: SO_REUSEADDR option set on accept socket 2005.10.10 16:50:22 LOG7[2940:1112]: https bound to 127.0.0.1:80 2005.10.10 16:50:32 LOG7[2940:1112]: https accepted FD=148 from 127.0.0.1:2977 2005.10.10 16:50:32 LOG7[2940:1112]: FD 148 in non-blocking mode 2005.10.10 16:50:32 LOG7[2940:1112]: Creating a new thread 2005.10.10 16:50:32 LOG7[2940:1112]: New thread created 2005.10.10 16:50:32 LOG7[2940:3904]: https started 2005.10.10 16:50:32 LOG5[2940:3904]: https connected from 127.0.0.1:2977 2005.10.10 16:50:32 LOG7[2940:3904]: FD 176 in non-blocking mode 2005.10.10 16:50:32 LOG7[2940:3904]: https connecting 207.46.197.39:443 2005.10.10 16:50:32 LOG7[2940:3904]: connect_wait: waiting 10 seconds 2005.10.10 16:50:33 LOG7[2940:3904]: connect_wait: connected 2005.10.10 16:50:33 LOG7[2940:3904]: Remote FD=176 initialized 2005.10.10 16:50:33 LOG7[2940:3904]: SSL state (connect): before/connect initialization 2005.10.10 16:50:33 LOG7[2940:3904]: SSL state (connect): SSLv3 write client hello A 2005.10.10 16:50:33 LOG7[2940:3904]: SSL state (connect): SSLv3 read server hello A 2005.10.10 16:50:33 LOG5[2940:3904]: VERIFY OK: depth=3, /C=US/O=GTE Corporation/OU=GTE CyberTrust Solutions, Inc./CN=GTE CyberTrust Global Root 2005.10.10 16:50:33 LOG5[2940:3904]: VERIFY OK: depth=2, /CN=Microsoft Internet Authority 2005.10.10 16:50:33 LOG5[2940:3904]: VERIFY OK: depth=1, /DC=com/DC=microsoft/DC=corp/DC=redmond/CN=Microsoft Secure Server Authority 2005.10.10 16:50:33 LOG5[2940:3904]: VERIFY OK: depth=0, /C=US/ST=Washington/L=Redmond/O=Microsoft/OU=UDDI Test production site/CN=test.uddi.microsoft.com 2005.10.10 16:50:33 LOG7[2940:3904]: SSL state (connect): SSLv3 read server certificate A 2005.10.10 16:50:33 LOG7[2940:3904]: SSL state (connect): SSLv3 read server done A 2005.10.10 16:50:33 LOG7[2940:3904]: SSL state (connect): SSLv3 write client key exchange A 2005.10.10 16:50:33 LOG7[2940:3904]: SSL state (connect): SSLv3 write change cipher spec A 2005.10.10 16:50:33 LOG7[2940:3904]: SSL state (connect): SSLv3 write finished A 2005.10.10 16:50:33 LOG7[2940:3904]: SSL state (connect): SSLv3 flush data 2005.10.10 16:50:33 LOG7[2940:3904]: SSL state (connect): SSLv3 read finished A 2005.10.10 16:50:33 LOG7[2940:3904]: 1 items in the session cache 2005.10.10 16:50:33 LOG7[2940:3904]: 1 client connects (SSL_connect()) 2005.10.10 16:50:33 LOG7[2940:3904]: 1 client connects that finished 2005.10.10 16:50:33 LOG7[2940:3904]: 0 client renegotiatations requested 2005.10.10 16:50:33 LOG7[2940:3904]: 0 server connects (SSL_accept()) 2005.10.10 16:50:33 LOG7[2940:3904]: 0 server connects that finished 2005.10.10 16:50:33 LOG7[2940:3904]: 0 server renegotiatiations requested 2005.10.10 16:50:33 LOG7[2940:3904]: 0 session cache hits 2005.10.10 16:50:33 LOG7[2940:3904]: 0 session cache misses 2005.10.10 16:50:33 LOG7[2940:3904]: 0 session cache timeouts 2005.10.10 16:50:33 LOG6[2940:3904]: SSL connected: new session negotiated 2005.10.10 16:50:33 LOG6[2940:3904]: Negotiated ciphers: RC4-MD5 SSLv3 Kx=RSA Au=RSA Enc=RC4(128) Mac=MD5 2005.10.10 16:51:38 LOG3[2940:3904]: readsocket: Connection reset by peer (WSAECONNRESET) (10054) 2005.10.10 16:51:38 LOG5[2940:3904]: Connection reset: 203 bytes sent to SSL, 3214 bytes sent to socket 2005.10.10 16:51:38 LOG7[2940:3904]: https finished (0 left)

1 0

Usage scenarios of stgunnel
by Jagannadha Bhattu Gosukonda 09 Oct '05

09 Oct '05

Hi, Can you kindly let me know the usage scenarios of stunnel in the sense that will it be used mainly at the client side / server side? which is the most common scenario? Thanks JB

1 0

STUNNEL and Windows 98 Second Edition
by David T. Ashley 08 Oct '05

08 Oct '05

I've installed STUNNEL on a Win 98 SE machine. Connections die after a few or a few hundred bytes. Any ideas? Thanks, Dave. ----------------------------------- David T. Ashley (dta(a)e3ft.com) Thousand Feet Consulting, LLC

2 1

UID/GID/Permissions Issue
by David T. Ashley 08 Oct '05

08 Oct '05

I've installed STUNNEL, works great, etc. etc. etc. Just one thing is a mystery .... The daemon definitely runs with UID "stunnel" (as I set it up), but still somehow it is able to grab its own keys and cert, as well as the client cert, which I set with root-only access. How is that possible? Does it buffer these things during startup (as root) before it sets UID/GID to stunnel, or am I missing something? Thanks. ----------------------------------- David T. Ashley (dta(a)e3ft.com) Thousand Feet Consulting, LLC

1 0

stunnel-4.12 Solaris 9 libwrap compile problem
by John Christian 07 Oct '05

07 Oct '05

Hi gurus... I'm setting up a centralized log server for all of my Solaris 9 hosts. Kim's article at http://www.sun.com/bigadmin/features/articles/syslog_ng.html is providing much of the guidence. I plan to use syslog-ng, but would like to have stunnel in place first. http://www.sunfreeware.com does not have a pre-rolled stunnel for Solaris 9. I'm receiving the error below when trying to compile stunnel-4.12 on Solaris 9. Can you offer any tips on overcoming the stunnelcompile error below? ERROR: [snip] gcc -g -O2 -Wall -Wshadow -Wcast-align -Wpointer-arith -I/usr/local/ssl/include -o stunnel client.o log.o options.o protocol.o network.o resolver.o ssl.o sthreads.o stunnel.o pty.o -lz -lsocket -lnsl -L/usr/local/ssl/lib -lssl -lcrypto -lwrap Undefined first referenced symbol in file allow_severity /usr/sfw/lib/libwrap.so deny_severity /usr/sfw/lib/libwrap.so ld: fatal: Symbol referencing errors. No output written to stunnel collect2: ld returned 1 exit status make[1]: *** [stunnel] Error 1 make[1]: Leaving directory `/var/spool/src/stunnel-4.12/src' make: *** [all-recursive] Error 1 I'm using GNU's make 3.80 and gcc 3.4.2. My environment variable LD_LIBRARY_PATH is: LD_LIBRARY_PATH=/usr/openwin/lib:/usr/dt/lib:/usr/local/lib:/usr/local/ssl/lib:/usr/sfw/lib Thanks for taking the time to share any direct solutions or hints that will help me find a solution. -John __________________________________ Yahoo! Mail - PC Magazine Editors' Choice 2005 http://mail.yahoo.com

1 0

Help With Verify = 3
by David T. Ashley 07 Oct '05

07 Oct '05

Hi, I installed Stunnel 4.12 on a Linux box, and am attempting to use it to secure SMTP e-mail injection from Windows machines. I have everything working, and I have a Windows Stunnel client which will inject mail into a Linux Stunnel server over TCP Port 465. However, I've been unable to find the right combination of verification settings to cause the server to refuse connections from clients without the right certificates. Right now, I'm able to inject mail if the client has ANY certificate. Is there any tutorial on how to generate the keys, .PEM files, and the Stunnel settings to have the behavior where only MY clients can inject mail? Thanks and best regards, Dave Ashley.

2 2

stunnel and logrotate
by Bohdan Linda 06 Oct '05

06 Oct '05

Hello, I have noticed that by sending -HUP signal to stunnel causes daemon to exit. The problem is when stunnel is logging to a file and the file was recreated (i.e. by logrotate). I have blindly configured logrotate to send -HUP to the stunnel after the logs are rotated and awaited 'common-habbit' functionality: re-read configuration and refresh file handles. But I was supprised: xxxx@yyyyy:/var/log# more stunnel.log.1 2005.09.27 14:07:51 LOG5[23244:3084273344]: stunnel 4.07 on xxxxxxxxxxxxxxx 2005.09.27 14:07:51 LOG5[23244:3084273344]: 500 clients allowed 2005.10.02 04:40:03 LOG3[23245:3084273344]: Received signal 1; terminating Apparently messages are going to the 'old' filehandle and stunnel exits. Is there any workaround to this except: 1) hard restarting stunnel 2) putting stunnel in inetd Thank you, Bohdan

2 1

Stunnel 4.12 won't work with Openssl 0.98
by Luca G. 05 Oct '05

05 Oct '05

Hi I upgraded yesterday from stunnel 4.11 to 4.12, and i had a few problems... Basically I have been unable to use latest libeay32.dll and libssl32.dll versions (the one that comes with stunnel's installation file). I use stunnel to tunnel a thightvnc connection from my windows xp sp2 workstation to a couple of windows 2000 server machine on the opposite side of the building. At the moment i'm keeping 0.98 files on the server machines, 0.97f on my client and it works These are my stunnel.conf files -----------------------------------client CAfile = CAcert.pem CApath = certificates cert = client.pem client = yes verify = 3 debug = 7 output = stunnel.log [vnc] accept = 127.0.0.1:5900 connect = 192.168.1.252:443 [vnc2] accept = 127.0.0.1:5899 connect = 192.168.1.254:443 ---------------------------------------- -------------------------------server CAfile = CAcert.pem CApath = certificates cert = server.pem client = no verify = 3 debug = 7 output = stunnel.log [vnc] accept = 443 connect = 127.0.0.1:5900 -------------------------------------- And this is what i found in my log files after every connection attempt -----------------------------------client 2005.10.05 09:50:21 LOG5[3880:3960]: stunnel 4.12 on x86-pc-mingw32-gnu WIN32+SELECT+IPv6 with OpenSSL 0.9.8 05 Jul 2005 2005.10.05 09:50:21 LOG7[3880:3964]: RAND_status claims sufficient entropy for the PRNG 2005.10.05 09:50:21 LOG6[3880:3964]: PRNG seeded successfully 2005.10.05 09:50:21 LOG7[3880:3964]: Certificate: client.pem 2005.10.05 09:50:21 LOG7[3880:3964]: Key file: client.pem 2005.10.05 09:50:21 LOG7[3880:3964]: Loaded verify certificates from CAcert.pem 2005.10.05 09:50:21 LOG7[3880:3964]: Verify directory set to certificates 2005.10.05 09:50:21 LOG5[3880:3964]: Peer certificate location certificates 2005.10.05 09:50:21 LOG5[3880:3964]: No limit detected for the number of clients 2005.10.05 09:50:21 LOG7[3880:3964]: FD 164 in non-blocking mode 2005.10.05 09:50:21 LOG7[3880:3964]: SO_REUSEADDR option set on accept socket 2005.10.05 09:50:21 LOG7[3880:3964]: vnc bound to 127.0.0.1:5900 2005.10.05 09:50:21 LOG7[3880:3964]: FD 168 in non-blocking mode 2005.10.05 09:50:21 LOG7[3880:3964]: SO_REUSEADDR option set on accept socket 2005.10.05 09:50:21 LOG7[3880:3964]: vnc2 bound to 127.0.0.1:5899 2005.10.05 09:50:30 LOG7[3880:3964]: vnc accepted FD=176 from 127.0.0.1:1351 2005.10.05 09:50:30 LOG7[3880:3964]: Creating a new thread 2005.10.05 09:50:30 LOG7[3880:3964]: New thread created 2005.10.05 09:50:30 LOG7[3880:388]: vnc started 2005.10.05 09:50:30 LOG7[3880:388]: FD 176 in non-blocking mode 2005.10.05 09:50:30 LOG5[3880:388]: vnc connected from 127.0.0.1:1351 2005.10.05 09:50:30 LOG7[3880:388]: FD 200 in non-blocking mode 2005.10.05 09:50:30 LOG7[3880:388]: vnc connecting 192.168.1.252:443 2005.10.05 09:50:30 LOG7[3880:388]: connect_wait: waiting 10 seconds 2005.10.05 09:50:30 LOG7[3880:388]: connect_wait: connected 2005.10.05 09:50:30 LOG7[3880:388]: Remote FD=200 initialized 2005.10.05 09:50:30 LOG7[3880:388]: SSL state (connect): before/connect initialization 2005.10.05 09:50:30 LOG7[3880:388]: SSL state (connect): SSLv3 write client hello A 2005.10.05 09:50:30 LOG7[3880:388]: SSL state (connect): SSLv3 read server hello A 2005.10.05 09:50:30 LOG5[3880:388]: VERIFY OK: depth=1, /C=IT/ST=Trentino/L=Trento/O=ATAS onlus/OU=Atas Trento/CN=VNC/emailAddress=tecnico(a)atas.tn.it 2005.10.05 09:50:30 LOG5[3880:388]: VERIFY OK: depth=0, /C=IT/ST=Trentino/L=Trento/O=ATAS onlus/OU=Atas Trento/CN=VNC_server/emailAddress=tecnico(a)atas.tn.it 2005.10.05 09:50:30 LOG7[3880:388]: SSL state (connect): SSLv3 read server certificate A 2005.10.05 09:50:30 LOG7[3880:388]: SSL state (connect): SSLv3 read server certificate request A 2005.10.05 09:50:30 LOG7[3880:388]: SSL state (connect): SSLv3 read server done A 2005.10.05 09:50:30 LOG7[3880:388]: SSL state (connect): SSLv3 write client certificate A 2005.10.05 09:50:30 LOG7[3880:388]: SSL state (connect): SSLv3 write client key exchange A 2005.10.05 09:50:30 LOG7[3880:388]: SSL state (connect): SSLv3 write certificate verify A ----------------------------------- -----------------------------------server 2005.10.04 10:49:50 LOG5[2480:2760]: stunnel 4.12 on x86-pc-mingw32-gnu WIN32+SELECT+IPv4 with OpenSSL 0.9.8 05 Jul 2005 2005.10.04 10:49:51 LOG7[2480:2824]: RAND_status claims sufficient entropy for the PRNG 2005.10.04 10:49:51 LOG6[2480:2824]: PRNG seeded successfully 2005.10.04 10:49:51 LOG7[2480:2824]: Certificate: server.pem 2005.10.04 10:49:51 LOG7[2480:2824]: Key file: server.pem 2005.10.04 10:49:51 LOG7[2480:2824]: Loaded verify certificates from CAcert.pem 2005.10.04 10:49:51 LOG7[2480:2824]: Verify directory set to certificates 2005.10.04 10:49:51 LOG5[2480:2824]: Peer certificate location certificates 2005.10.04 10:49:51 LOG5[2480:2824]: No limit detected for the number of clients 2005.10.04 10:49:51 LOG7[2480:2824]: FD 864 in non-blocking mode 2005.10.04 10:49:51 LOG7[2480:2824]: SO_REUSEADDR option set on accept socket 2005.10.04 10:49:51 LOG7[2480:2824]: vnc bound to 0.0.0.0:443 2005.10.04 10:51:00 LOG7[2480:2824]: vnc accepted FD=852 from 192.168.1.250:13545 2005.10.04 10:51:00 LOG7[2480:2824]: Creating a new thread 2005.10.04 10:51:00 LOG7[2480:2824]: New thread created 2005.10.04 10:51:00 LOG7[2480:2740]: vnc started 2005.10.04 10:51:00 LOG7[2480:2740]: FD 852 in non-blocking mode 2005.10.04 10:51:00 LOG5[2480:2740]: vnc connected from 192.168.1.250:13545 2005.10.04 10:51:00 LOG7[2480:2740]: SSL state (accept): before/accept initialization 2005.10.04 10:51:00 LOG7[2480:2740]: SSL state (accept): SSLv3 read client hello A 2005.10.04 10:51:00 LOG7[2480:2740]: SSL state (accept): SSLv3 write server hello A 2005.10.04 10:51:00 LOG7[2480:2740]: SSL state (accept): SSLv3 write certificate A 2005.10.04 10:51:00 LOG7[2480:2740]: SSL state (accept): SSLv3 write certificate request A 2005.10.04 10:51:00 LOG7[2480:2740]: SSL state (accept): SSLv3 flush data 2005.10.04 10:51:00 LOG3[2480:2740]: SSL_accept: Peer suddenly disconnected 2005.10.04 10:51:00 LOG7[2480:2740]: vnc finished (0 left) ----------------------------------- Am i doing soething wrong? Thanks in advance Luca

1 0

4.12 Broken?
by G J Piper 04 Oct '05

04 Oct '05

The new Stunnel Version 4.12 doesn't work well with POPs mail retrieval on my system. Reverting back to 4.11 fixes it perfectly. With 4.12, various emails wouldn't come through, got random timeouts, LONG email retrieval times mainly. Sometimes an email would be impossible to retrieve from the spool file. Running Stunnel with default parameters. Standalone I believe POPs runs off xinetd. % uname -a FreeBSD pipercomputerservices.net 4.4-RELEASE FreeBSD 4.4-RELEASE #0: Wed Aug 28 19:41:18 GMT 2002 root@osbuilder:/usr/src/sys/compile/SERVER i386 % gcc -v Using builtin specs. gcc version 2.95.3 20010315 (release) [FreeBSD] % openssl version OpenSSL 0.9.6e 30 Jul 2002 % stunnel -version stunnel 4.11 on i386-unknown-freebsd4.4 PTHREAD+POLL+IPv4+LIBWRAP with OpenSSL 0.9.6e 30 Jul 2002 Global options cert = /usr/local/etc/stunnel/stunnel.pem ciphers = ALL:!ADH:+RC4:@STRENGTH debug = 5 key = /usr/local/etc/stunnel/stunnel.pem pid = /usr/local/var/run/stunnel.pid RNDbytes = 64 RNDfile = /dev/urandom RNDoverwrite = yes session = 300 seconds verify = none Service-level options TIMEOUTbusy = 300 seconds TIMEOUTclose = 60 seconds TIMEOUTconnect = 10 seconds TIMEOUTidle = 43200 seconds

2 2

Help: Remote desktop connection crashes Stunnel
by Jonathan Bell 04 Oct '05

04 Oct '05

In an attempt to get remote desktop set up over SSL tunneling with compression, I have installed stunnel on my Windows XP Professional SP2 machine and created a "portable" stunnel/config/dll zip that just contains the essentials to create a pre-configured tunnel. Here are the two config files: Server -------------------------------- ; Sample stunnel configuration file by Michal Trojnara 2002-2005 ; Some options used here may not be adequate for your particular configuration ; Certificate/key is needed in server mode and optional in client mode ; The default certificate is provided only for testing and should not ; be used in a production environment cert = stunnel.pem key = stunnel.pem ; Some performance tunings socket = l:TCP_NODELAY=1 socket = r:TCP_NODELAY=1 compression = zlib ; Some debugging stuff useful for troubleshooting debug = 6 output = G:\Stunnel Logs\stunnel.log taskbar = no ; Use it for client mode client = no ; Service-level configuration [remote-desktop] accept = 9833 connect = 127.0.0.1:3389 --------------------------------- Client --------------------------------- ; Sample stunnel configuration file by Michal Trojnara 2002-2005 ; Some options used here may not be adequate for your particular configuration ; Some performance tunings socket = l:TCP_NODELAY=1 socket = r:TCP_NODELAY=1 compression = zlib ; Some debugging stuff useful for troubleshooting debug = 7 output = stunnel.log taskbar = yes ; Use it for client mode client = yes ; Service-level configuration [remote-desktop] accept = 127.0.0.1:6389 connect = my.host.name:9833 ---------------------------------- The procedure I used was as follows - start Stunnel on the host, run upstairs with the zipped "portable" stunnel on a USB drive, run stunnel on the other PC, also running XP Pro SP2. Start->run->mstsc, enter 127.0.0.1:6389 and all that happens is that stunnel instantly crashes then Remote Desktop times out. What am I doing wrong?

2 1

Dual Instance of Stunnel Service on W2K
by Mundy Jennifer 04 Oct '05

04 Oct '05

Am new to stunnel and in need of some help. I have W2K box that has Stunnel installed as a service. Upon startup, it starts the service and uses the default stunnel.conf file. I would like to install a second Stunnel service and call a custom .conf service. Is this possible? I've read thru the documentation but haven't come across anything about a second service. We're running v4.05. I know I can get a second instance running via cmd line/batch file, but need the second instance to startup automatically so it can be monitored as well as other things. Thank you in advance. Jennifer The information contained in this e-mail may be confidential and is intended solely for the use of the named addressee. Access, copying or re-use of the e-mail or any information contained therein by any other person is not authorized. If you are not the intended recipient please notify us immediately by returning the e-mail to the originator.(17b)

1 0

SSL_GET_NEW_SESSION:ssl session id callback failed
by DoJo 04 Oct '05

04 Oct '05

Hi There, We have run into "SSL_GET_NEW_SESSION:ssl session id callback failed" error. Can anyone describe what it means? I didn't find any information about it. We'd like to use stunnel to secure Oracle SQL*Net communication. HP-UX server communicates with Win32 clients. We use stunnel standalone not from inetd. Any help would be appreciated. Thanks DoJo Here is a cut from the log file (level 7): 2005.09.29 11:49:53 LOG5[10388:1]: stunnel 4.09 on hppa2.0w-hp-hpux11.11 PTHREAD+POLL+IPv4+LIBWRAP with OpenSSL 0.9.7e 25 Oct 2004 2005.09.29 11:49:53 LOG7[10388:1]: Snagged 0 random bytes from EGD Socket /var/run/egd-pool 2005.09.29 11:49:53 LOG6[10388:1]: PRNG seeded successfully 2005.09.29 11:49:53 LOG7[10388:1]: Certificate: /opt/iexpress/stunnel/etc/stunnel/..._cert.cer 2005.09.29 11:49:53 LOG7[10388:1]: Key file: /opt/iexpress/stunnel/etc/stunnel/..._privkey.pem 2005.09.29 11:49:53 LOG6[10388:1]: file ulimit = 60 (can be changed with 'ulimit -n') 2005.09.29 11:49:53 LOG6[10388:1]: poll() used - no FD_SETSIZE limit for file descriptors 2005.09.29 11:49:53 LOG5[10388:1]: 27 clients allowed 2005.09.29 11:49:53 LOG7[10388:1]: FD 4 in non-blocking mode 2005.09.29 11:49:53 LOG7[10388:1]: FD 5 in non-blocking mode 2005.09.29 11:49:53 LOG7[10388:1]: FD 6 in non-blocking mode 2005.09.29 11:49:53 LOG7[10388:1]: SO_REUSEADDR option set on accept socket 2005.09.29 11:49:53 LOG7[10388:1]: myapp bound to 0.0.0.0:2000 2005.09.29 11:49:53 LOG7[10389:1]: Created pid file /stunnel.pid 2005.09.30 12:01:47 LOG7[10389:1]: myapp accepted FD=1 from 10.3.125.165:3570 2005.09.30 12:01:47 LOG7[10389:1]: FD 1 in non-blocking mode 2005.09.30 12:01:47 LOG7[10389:2]: myapp started 2005.09.30 12:01:47 LOG5[10389:2]: myapp connected from 10.3.125.165:3570 2005.09.30 12:01:47 LOG7[10389:2]: SSL state (accept): before/accept initialization 2005.09.30 12:01:47 LOG3[10389:2]: SSL_accept: 140B544E: error:140B544E:SSL routines:SSL_GET_NEW_SESSION:ssl session id callback failed 2005.09.30 12:01:47 LOG7[10389:2]: myapp finished (0 left) Our config file: cert = /opt/iexpress/stunnel/etc/stunnel/..._cert.cer # contains the server's signed (by a CA) cert. key = /opt/iexpress/stunnel/etc/stunnel/..._privkey.pem # contains the server's private key service = myapp-ssl chroot = /var/run/stunnel pid = /stunnel.pid setuid = oracle setgid = oracle debug = 7 output = stunnel.log client = no [myapp] accept=2000 connect=1521

1 1

stunnel4 user + permissions
by nick.hoffman＠altcall.com 04 Oct '05

04 Oct '05

Hey guys, I've been using stunnel for a while and it's great. I've noticed something that doesn't make much sense to me though, so I was wondering if you might be able to shed some light. Stunnel runs as user:group stunnel4:stunnel4. The server reads client certs (for verify = 3) from /etc/stunnel/certs/ which is chown'd root:ssl-certs and chmod'd 750. The client PEMs in that directory have the same ownership and permissions. User stunnel4 is in the ssl-certs group. When a client connects, the server is unable to read from /etc/stunnel/certs/. If I change the ownership of the directory to root:stunnel4 though, everything works. Any idea why this occurs? Cheers, Nick

2 1

Win2k, stunnel & Magic Mail Monitor questions
by Dana Rasmussen 04 Oct '05

04 Oct '05

Hello, I am running Windows 2000. I have recently learned of the stunnel tool. I am using it with Magic Mail Monitor, (MMM). MMM is a POP3 new mail notifier program. MMM allows me to configure a POP3 server by user name, host, password and POP3 port. MMM allows me to have multiple POP3 servers configured. Unfortunately, MMM does not use SSL. I have been able to get MMM to work with stunnel with the following stunnel.conf file: client = yes [MyPOP3SSL] accept=995 connect=mypop3server.com:995 The associated MMM configuration is: user: myuser host: 127.0.0.1 password:mypassword port:995 I would like to be able to add a second POP3 server to MMM, i.e. Gmail. If I add the following to the bottom of the existing stunnel.conf file Gmail POP3SSL access fails. If I add the following to the top of the existing stunnel.conf file the MyPOP3SSL fails but Gmail works. [GmailPOP3SSL] accept=995 connect=pop.gmail.com:995 The additional MMM configuration is: user:mygmail host: 127.0.0.1 password:mygmailpassword port:995 Is there a way to map the MMM configurations to the matching entries in the stunnel.conf file? Thank you, Dana

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Peer suddenly disconnected
by Mark Tabash 03 Oct '05

03 Oct '05

Hello, I'm having problems using stunnel. I would be glad to provide further information upon request. The funny thing is that it was working before I shipped the client pc to the remote location. Nothing has changed since. Here's what I get in the logs: CLIENT: ssmtp accepted FD=8 from 127.0.0.1:32844 FD 8 in non-blocking mode ssmtp started ssmtp connected from 127.0.0.1:32844 FD 9 in non-blocking mode ssmtp connecting 62.21.201.224:465 remote connect #1: EINPROGRESS: retrying waitforsocket: FD=9, DIR=write waitforsocket: ok Remote FD=9 initialized SSL state (connect): before/connect initialization SSL state (connect): SSLv3 write client hello A waitforsocket: FD=9, DIR=read waitforsocket: ok SSL state (connect): SSLv3 read server hello A SSL state (connect): SSLv3 read server certificate A SSL state (connect): SSLv3 read server certificate request A SSL state (connect): SSLv3 read server done A SSL state (connect): SSLv3 write client certificate A SSL state (connect): SSLv3 write client key exchange A SSL state (connect): SSLv3 write certificate verify A SSL state (connect): SSLv3 write change cipher spec A SSL state (connect): SSLv3 write finished A SSL state (connect): SSLv3 flush data waitforsocket: FD=9, DIR=read waitforsocket: ok SSL_connect: Peer suddenly disconnected ssmtp finished (0 left) SERVER: ssmtp accepted FD=8 from 77.34.26.143:32845 FD 8 in non-blocking mode ssmtp started ssmtp connected from 77.34.26.143:32845 SSL state (accept): before/accept initialization SSL state (accept): SSLv3 read client hello A SSL state (accept): SSLv3 write server hello A SSL state (accept): SSLv3 write certificate A SSL state (accept): SSLv3 write certificate request A SSL state (accept): SSLv3 flush data SSL_accept: Peer suddenly disconnected ssmtp finished (0 left) ============================================ CLIENT INFO: stunnel 4.05 on i386-pc-linux-gnu PTHREAD+LIBWRAP with OpenSSL 0.9.7e 25 Oct 2004 Global options cert = /etc/stunnel/stunnel.pem ciphers = ALL:!ADH:+RC4:@STRENGTH debug = 5 key = /etc/stunnel/stunnel.pem pid = /var/run/stunnel4/stunnel.pid RNDbytes = 64 RNDfile = /dev/urandom RNDoverwrite = yes session = 300 seconds verify = none Service-level options TIMEOUTbusy = 300 seconds TIMEOUTclose = 60 seconds TIMEOUTidle = 43200 seconds ------------------ SERVER INFO: stunnel 4.09 on x86_64-pc-linux-gnu PTHREAD+POLL+IPv6+LIBWRAP with OpenSSL 0.9.7e 25 Oct 2004 Global options cert = /etc/stunnel/stunnel.pem ciphers = ALL:!ADH:+RC4:@STRENGTH debug = 5 key = /etc/stunnel/stunnel.pem pid = /var/lib/run/stunnel.pid RNDbytes = 64 RNDfile = /dev/urandom RNDoverwrite = yes session = 300 seconds verify = none Service-level options TIMEOUTbusy = 300 seconds TIMEOUTclose = 60 seconds TIMEOUTconnect = 10 seconds TIMEOUTidle = 43200 seconds

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Stunnel 4.12 released
by Michal Trojnara 30 Sep '05

30 Sep '05

Here is the ChangeLog entry: Version 4.12, 2005.09.29, urgency: MEDIUM: * New features - Win32 installer added. - New Win32 commandline options: -start and -stop. - Log level and thread number are reported to syslog. - DLLs for OpenSSL 0.9.8. - stunnel.spec updated by neeo <neeo(a)irc.pl>. * Bugfixes - Use of broken poll() is disabled on Mac OS X. - Yet another transfer() infinite loop condition fixed. - Workaround for a serious M$ bug (KB177346). - IPv6 DLLs allocation problem resulting in GPF on W2K fixed. - zlib added to shared libraries (OpenSSL may need it). - size_t printf() fixed in stack_info(). * Release notes - This is a bugfix release. Upgrade is recommended. Homepage: http://stunnel.mirt.net/ Download: ftp://stunnel.mirt.net/stunnel/ sha1sum: 3a0f1b9955f64dcab376b4145663f1eadc5dfba5 stunnel-4.12.tar.gz Best regards, Mike

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Stunnel Win32 binary
by Michal Trojnara 30 Sep '05

30 Sep '05

Dear Users, Some people were asking me for a standalone stunnel.exe file. It's located in stunnel-4.12/src directory of stunnel-4.12.tar.gz archive. Winzip can handle .tar.gz format, so you'll be able to unpack it. http://www.winzip.com/wzdifs.htm BTW: I recommend to try the installer, anyway. It's designed to make the upgrade much easier. You can simply enter the path where your current stunnel.exe and stunnel.conf are located during the install. stunnel.conf and stunnel.pem files won't be replaced and your Windows will remember the path so you won't have to enter it on next upgrade. Also the latest OpenSSL DLLs are installed in stunnel directory each time. Notes: 1. Uninstall removes stunnel.conf, so don't uninstall if you're only going to upgrade stunnel. 2. Remember to stop stunnel before you uninstall/upgrade it. Best regards, Mike

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No encryption?
by Revelancefound＠aol.com 27 Sep '05

27 Sep '05

Dear patient users, It seems that stunnel does not encrypt outward traffic from my pc. I was able to get stunnel to work in the first place by having different proxies for each protocol. However, to test if my 8196 bit + x509 certificate keys actually encrypted my traffic I decided to do a test. I had sniffed my own computer using Cain and Able while logging in to my home router. To my disappointment, the sniffer picked up my username and password in plain text through HTTP protocol several times. Either that or Able can crack 256bit level encryption (256 x 32 = 8196) rather quickly. My stunnel.conf file: ; Sample stunnel configuration file by Michal Trojnara 2002-2005 ; Some options used here may not be adequate for your particular configuration ; Certificate/key is needed in server mode and optional in client mode cert = C:\Program Files\stunnel\stunnel.pem key = C:\Program Files\stunnel\stunnel.pem ; Some performance tunings socket = l:TCP_NODELAY=1 socket = r:TCP_NODELAY=1 ; 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 = certs.pem ; Don't forget to c_rehash CRLpath; CRLpath is located inside chroot jail: ;CRLpath = crls ; Alternatively you can use CRLfile: ;CRLfile = crls.pem ; Some debugging stuff useful for troubleshooting ;debug = 7 ;dutput = C:\Program Files\stunnel\stunnel.log ; Use it for client mode client = yes ; Service-level configuration client = yes verify = 0 ;[pop3s] ;accept = 995 ;connect = 110 ;[imaps] ;accept = 993 ;connect = 143 [ssmtp] accept = 127.0.0.1:465 connect = httpsupportingproxy4:3124 TIMEOUTclose = 0 [http] accept = 127.0.0.1:444 connect = httpsupportingproxy3:6588 TIMEOUTclose = 0 [https] accept = 127.0.0.1:443 connect = httpsupportingproxy2:6588 TIMEOUTclose = 0 [ftps] accept = 127.0.0.1:21 connect = httpsupportingproxy1:6588 TIMEOUTclose = 0 ; vim:ft=dosini And my bat file used to generate keys: openssl req -new -x509 -days 365 -nodes -config C:\OpenSSL\bin\openssl.cnf -out stunnel.pem -keyout stunnel.pem ;requirements: ;OpensSSL.exe in C:\windows directory ;Installation of Win32OpenSSL-v0.9.8.mis to C:\ ;Edit C:\OpenSSL\bin\openssl.cnf strings ;[ req ] ;default_bits = 8196 ;default_keyfile = stunnel.pem ;distinguished_name = req_distinguished_name ;attributes = req_attributes ;x509_extensions = v3_ca # The extentions to add to the self signed cert Cain Log: ================================================================== = Cain's MAC Scanner/Promiscuous-mode Detector = ================================================================== IP Address: (Router) MAC Address: (RouterMAC) OUI Fingerprint: Cisco-Linksys, LLC Hostname: ARP Test (Broadcast 31-bit): * ARP Test (Broadcast 16-bit): * ARP Test (Broadcast 8-bit): * ARP Test (Group bit): * ARP Test (Multicast group 0): * ARP Test (Multicast group 1): * ARP Test (Multicast group 3): * Am I doing something wrong here?

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question about usage of configfile
by Revelancefound＠aol.com 26 Sep '05

26 Sep '05

To put it blatantly, I am trying to make stunnel 4.12 create a 2 way encrypted channel from my home computer as a client to an SSL supporting proxy (HTTP). Also, I am using localhost (127.0.0.1) as a connect address for proxy settings in such programs as Internet Explorer or a download manager. A sample of my stunnel.conf is bellow: client = yes verify = 0 [https] accept = 127.0.0.1:8080 connect = ssl.supporting.httpproxy.with.openport:80 TIMEOUTclose = 0 ; vim:ft=dosini My computer currently has the following installed: stunnel-4.12 Opensslv0.9.8 (Win32OpenSSL-v0.9.8.exe) ActivePerl-5.8.7.813-MSWin32-x86-148120.msi Windows XP Home Edition (SP2) Whenever I try to connect to 127.0.0.1:8080 the stunnel log reports 2005.09.23 20:57:33 LOG5[6012:5668]: stunnel 4.12 on x86-pc-mingw32-gnu WIN32+IPv6 with OpenSSL 0.9.8 05 Jul 2005 2005.09.23 20:57:33 LOG5[6012:4600]: No limit detected for the number of clients 2005.09.23 20:57:38 LOG5[6012:1560]: https connected from 127.0.0.1:3226 2005.09.23 20:59:10 LOG5[6012:5396]: https connected from 127.0.0.1:3232 2005.09.23 21:04:10 LOG5[6012:4576]: https connected from 127.0.0.1:3249 2005.09.23 21:09:10 LOG5[6012:4652]: https connected from 127.0.0.1:3268 2005.09.23 21:14:10 LOG5[6012:5396]: https connected from 127.0.0.1:3283 2005.09.23 21:19:12 LOG5[6012:1556]: https connected from 127.0.0.1:3296 2005.09.23 21:24:13 LOG5[6012:4072]: https connected from 127.0.0.1:3309 2005.09.23 21:29:23 LOG3[6012:3408]: Failed to initialize remote connection 2005.09.23 21:29:23 LOG5[6012:6140]: https connected from 127.0.0.1:3332 And so on into infinity Am I trying to do the impossible, or are all those 8196 bit RSA keys (certified through x508) that I generated going to waste?

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stunnel for dovecot
by dhaval thakar 26 Sep '05

26 Sep '05

dear friends, i m preparing for RHCE Exam, as dovecot can not be configured in host.deny (TCP wrappers), we can create tunnel using stunnel & can use for the security perpose. kindly help me blocking pop3 access using host.deny file (using dovecot for the pop3) thanks in advance

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minor annoyance
by Alaric Dailey 26 Sep '05

26 Sep '05

I have been using stunnel for a while with great success, only one minor issue, I am using stunnel for my http server and it ALWAYS logs traffic as coming from the stunnel IP rather than the IP address it is really coming from, is there a way around this?

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RE: [stunnel-users] newbie stunnel question
by Revelancefound＠aol.com 25 Sep '05

25 Sep '05

no data is being transfered, thats the problem 2005.09.24 09:41:19 LOG5[1672:3268]: stunnel 4.11 on x86-pc-mingw32-gnu WIN32+IPv6 with OpenSSL 0.9.7f 22 Mar 2005 2005.09.24 09:41:20 LOG5[1672:2716]: No limit detected for the number of clients 2005.09.24 09:41:33 LOG5[1672:3576]: http connected from 127.0.0.1:1876 2005.09.24 09:42:18 LOG5[1672:1176]: http connected from 127.0.0.1:1881 2005.09.24 09:42:35 LOG5[1672:1408]: http connected from 127.0.0.1:1884 2005.09.24 09:42:44 LOG5[1672:1028]: http connected from 127.0.0.1:1887 And so on until Failed to initialize remote connection My config file: client = yes cert=c:\stunnel\stunnel.pem [http] accept = 127.0.0.1:80 connect = httpsupportingsslserver:80 [https] accept = 127.0.0.1:443 connect = httpsupportingsslserver:80 [ftp] accept = 127.0.0.1:22 connect = httpsupportingsslserver:80 Am I missing something here?

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newbie stunnel question
by Revelancefound＠aol.com 24 Sep '05

24 Sep '05

Hello, im new to stunnel 4.11 and I am currently having trouble creating ssl conncetions. My operating sysytem in Windows XP Home (SP2), I am running Stunnel not as a service and I do not have CERT nor chroot. I am trying to create a SSL tunnel from my pc (stunnel in client mode) to a SSL supporting proxy that does not spill my ip. Because I am using windows I have to edit the stunnel.conf file, its contense is displayed here: client = yes cert=c:\stunnel\stunnel.pem [http] accept = 127.0.0.1:3900 connect = 200.114.206.192:8080 [https] accept = 127.0.0.1:3900 connect = 200.114.206.192:8080 [ftp] accept = 127.0.0.1:3900 connect = 200.114.206.192:8080 After these values are estabolished an netstat -an shows Proto Local Address Foreign Address State TCP 127.0.0.1:3900 0.0.0.0:0 LISTENING Can someone please help me? Attachment:

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stunnel >= 4.0.7 crashes on IPv6 enabled Windows 2000
by Peter Bieringer 24 Sep '05

24 Sep '05

Hi, 4.0.6 claim about "The procedure entry point freeaddrinfo could not be located in the dynamic link library WS2_32.DLL" 4.0.7 and above crashes "...has generated errors". Windows 2000 is IPv6 enabled by <http://msdn.microsoft.com/downloads/sdks/platform/tpipv6.asp> with information from: <http://msdn.microsoft.com/downloads/sdks/platform/tpipv6/faq.asp> Is it planned to fix this issue? BTW: IPv6 enabled 4.0.11 works fine on Linux ! Peter -- Dr. Peter Bieringer http://www.bieringer.de/pb/ GPG/PGP Key 0x958F422D mailto: pb at bieringer dot de Deep Space 6 Co-Founder and Core Member http://www.deepspace6.net/

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Re: stunnel-users Digest, Vol 14, Issue 7
by mxrtmxd72＠att.net 22 Sep '05

22 Sep '05

Thanks Michael. -------------- Original message ---------------------- From: stunnel-users-request(a)mirt.net > Send stunnel-users mailing list submissions to > stunnel-users(a)mirt.net > > To subscribe or unsubscribe via the World Wide Web, visit > http://stunnel.mirt.net/mailman/listinfo/stunnel-users > or, via email, send a message with subject or body 'help' to > stunnel-users-request(a)mirt.net > > You can reach the person managing the list at > stunnel-users-owner(a)mirt.net > > When replying, please edit your Subject line so it is more specific > than "Re: Contents of stunnel-users digest..." > > > Today's Topics: > > 1. Help Installing Stunnel After Reformat Drive (mxrtmxd72(a)att.net) > 2. Re: Help Installing Stunnel After Reformat Drive (Michal Trojnara) > > > ---------------------------------------------------------------------- > > Message: 1 > Date: Wed, 21 Sep 2005 20:21:03 +0000 > From: mxrtmxd72(a)att.net > Subject: [stunnel-users] Help Installing Stunnel After Reformat Drive > To: stunnel-users(a)mirt.net (stunnel-users) > Message-ID: > > <092120052021.21511.4331C0AE000BE230000054072160376316CDC90B98039B9D9803(a)att.net > > > > > I have been using Stunnel with Agent versioin 3. My system recently crashed and > I had to re-format the hard drive, reinstall Windows XP, and reinstall my apps. > I have followed the directions at wurd.com/cl_ssl_stunnel.php#Windows. > Fortunately, I had backups of the required files. > > I placed libeay32.dll, libssl32.dll, stunnel-4.10.exe, and stunnel.conf in > C:\Stunnel. > > I placed a shortcut on the desktop which points to C:\Batch\runagent.bat. > > C:\Batch\runagent.bat consists of the following line: > c:\batch\runagent.cmd > > c:\batch\runagent.cmd consists of the following lines: > net start stunnel > "C:\Program Files\Agent\agent.exe" > net stop stunnel > > There is also a desktop shortcut which points to C:\Stunnel\stunnel-4.10.exe. > > When I place a pause command following the net start stunnel line in > runagent.cmd a message appears: The service name is invalid. > > The WURD document seems to imply that it is not necessary to run stunnel-410.exe > -install unless you want Stunnel to run all the time. Am I missing something? > I don't remember exactly how I made this work when I first installed it before > my system crashed. > > Any assistance would be gratefully appreciated. Thanks. > > Mort Middleman > > > > > > > Print. > Move to folder: > > > > ------------------------------ > > Message: 2 > Date: Thu, 22 Sep 2005 10:05:51 +0200 > From: "Michal Trojnara" <Michal.Trojnara(a)mobi-com.net> > Subject: Re: [stunnel-users] Help Installing Stunnel After Reformat > Drive > To: "stunnel-users" <stunnel-users(a)mirt.net> > Message-ID: <001401c5bf4c$823b6f00$df66a8c0@DT1518000186> > Content-Type: text/plain; format=flowed; charset="iso-8859-2"; > reply-type=original > > Mort Middleman <mxrtmxd72(a)att.net> wrote: > > net start stunnel > [cut] > > The WURD document seems to imply that it is not necessary to run > > stunnel-410.exe > > -install unless you want Stunnel to run all the time. Am I missing > > something? > > Yes. You need to install a service in order to start it. 8-) > You can change Startup Type in your Control Panel/Services so stunnel > service is not started automatically. > > BTW: Stunnel 4.12 is going to be released with a Windows installer, so users > won't have to maually copy the dlls. 8-) > You could try a prerelease here: > ftp://ftp.mirt.net/stunnel/stunnel-4.12rc1-installer.exe > > Best regards, > Mike > > > > ------------------------------ > > _______________________________________________ > stunnel-users mailing list > stunnel-users(a)mirt.net > http://stunnel.mirt.net/mailman/listinfo/stunnel-users > > > End of stunnel-users Digest, Vol 14, Issue 7 > ********************************************

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Help Installing Stunnel After Reformat Drive
by mxrtmxd72＠att.net 22 Sep '05

22 Sep '05

I have been using Stunnel with Agent versioin 3. My system recently crashed and I had to re-format the hard drive, reinstall Windows XP, and reinstall my apps. I have followed the directions at wurd.com/cl_ssl_stunnel.php#Windows. Fortunately, I had backups of the required files. I placed libeay32.dll, libssl32.dll, stunnel-4.10.exe, and stunnel.conf in C:\Stunnel. I placed a shortcut on the desktop which points to C:\Batch\runagent.bat. C:\Batch\runagent.bat consists of the following line: c:\batch\runagent.cmd c:\batch\runagent.cmd consists of the following lines: net start stunnel "C:\Program Files\Agent\agent.exe" net stop stunnel There is also a desktop shortcut which points to C:\Stunnel\stunnel-4.10.exe. When I place a pause command following the net start stunnel line in runagent.cmd a message appears: The service name is invalid. The WURD document seems to imply that it is not necessary to run stunnel-410.exe -install unless you want Stunnel to run all the time. Am I missing something? I don't remember exactly how I made this work when I first installed it before my system crashed. Any assistance would be gratefully appreciated. Thanks. Mort Middleman Print. Move to folder:

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RE: [stunnel-users] Access to a daemon that has SSL abilities
by Amiram Oren 15 Sep '05

15 Sep '05

10x for the quick reply Alaric! Just want to see if I fully understand your note.. You set the stunnel daemon (/application) on a certain client machine. (let's say you have an IMAP client on it) Then, you configure your Argosoft server, which is set on another machine, to listen to SSL communication (i.e. IMAPS). Is this correct? Cheers, Oren. -----Original Message----- From: Alaric Dailey [mailto:[email protected]] Sent: Wednesday, September 14, 2005 7:44 PM To: Amiram Oren; stunnel-users(a)mirt.net Subject: Re: [stunnel-users] Access to a daemon that has SSL abilities Amiram Oren wrote: > Hi. > > Can I use stunnel only on a client side, in case on the other side, > the server already supports SSL? > > Will this work for SPOP3 and SMTP\S? > > 10X! > > Oren Amiram > >ilman/listinfo/stunnel-users > > I use it on my Argosoft email server to support IMAP, pop3 and HTTP with SSL onWindows 2003 yet :) - ______________________________________________________________________ This email message has been scanned by PineApp Mail-Secure and has been found clean.

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Failed to initialize remote connection
by stunnel-users＠tinfoil.cotse.net 15 Sep '05

15 Sep '05

Hello I am running the Win32 binaries, v4.11, and up to now, they were working fine, as had all the 4.x versions before. But now my http connection will not work; it says "Failed to initialize remote connection". 2005.09.14 22:50:04 LOG3[2500:1492]: Failed to initialize remote connection 2005.09.14 22:50:06 LOG3[2500:1608]: Failed to initialize remote connection Please can anyone advice me what is wrong and how to put this right? Thanks.

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Re: stunnel-4.11 stable?
by Serge Marigold 14 Sep '05

14 Sep '05

FYI, I'm trying to make a case so that my employer will feel some degree of comfort if we deploy it. Is there any other commercial entity that uses this version (4.11) of stunnel. Thanks

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stunnel-4.11 patch for multiple certificates
by Nick Tolomiczenko 14 Sep '05

14 Sep '05

Hi stunnel users, I placed a patch to stunnel-4.11 that will enable it to handle multiple certificates. It is currently awaiting moderator approval. For those who can't wait, please contact myself, Nick Tolomiczenko, or Shem Ali below. Here's the description of what it does: This patch addresses the need for service-level ssl contexts. In particular, the following options which were only available as global options may now be used at the service level: cert, key, CApath, CAfile, ciphers, CRLpath, CRLfile, options, client and verify. If any of these options are used in a service section, stunnel will override its global setting -- if it exists -- and initialize a separate ssl context for the service. On the other hand, for those services that do not specify any of these options, stunnel will fall back on what was specified in the global section of the configuration file and intialize a "common" ssl context for those services. Note: If all services each specified at least one the the above ssl options, then the no "common" ssl context will be initialized since each service will have its own. In this case, it's still a good idea to put common default ssl options in the global section as each service will inherit these settings even if the service initializes its own ssl context. Brought to you by: Nick Tolomiczenko: nick(a)renderquest.com or nick(a)neikos.com Shem Ali: shem(a)renderquest.com

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stunnel-4.11 patch for multiple certificates
by Nick Tolomiczenko 14 Sep '05

14 Sep '05

This patch addresses the need for service-level ssl contexts. In particular, the following options which were only available as global options may now be used at the service level: cert, key, CApath, CAfile, ciphers, CRLpath, CRLfile, options, client and verify. If any of these options are used in a service section, stunnel will override its global setting -- if it exists -- and initialize a separate ssl context for the service. On the other hand, for those services that do not specify any of these options, stunnel will fall back on what was specified in the global section of the configuration file and intialize a "common" ssl context for those services. Note: If all services each specified at least one the the above ssl options, then the no "common" ssl context will be initialized since each service will have its own. In this case, it's still a good idea to put common default ssl options in the global section as each service will inherit these settings even if the service initializes its own ssl context. Brought to you by: Nick Tolomiczenko: nick(a)renderquest.com or nick(a)neikos.com Shem Ali: shem(a)renderquest.com

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Access to a daemon that has SSL abilities
by Amiram Oren 14 Sep '05

14 Sep '05

Hi. Can I use stunnel only on a client side, in case on the other side, the server already supports SSL? Will this work for SPOP3 and SMTP\S? 10X! Oren Amiram

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stunnel-4.11 stable?
by Serge Marigold 13 Sep '05

13 Sep '05

Hi, Is anyone using stunnel-4.11 in a heavily trafficed production environment?

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4.10 stable?
by conover＠rahul.net 09 Sep '05

09 Sep '05

Stunnel 4.10 has gzip compression, right? Is it stable? Thanks, John -- John Conover, conover(a)rahul.net, http://www.johncon.com/

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[BUG] Stunnel 4.10 + xinetd : Connection reset by peer
by Eric Piel 02 Sep '05

02 Sep '05

Hello, I've upgraded to stunnel 4.10 yesterday and since this time I can't managed to get stunnel working with xinetd. I try to access a CVS server with ssl encryption. If stunnel is started as stand-alone, it works as before, but when it's started by xinetd all I get is: cvs [update aborted]: reading from server: Connection reset by peer I've attached the connection logs with 4.09 and 4.10 as well as my configuration file (which used to work for more than a year). My xinetd is version 2.3.13 (and I haven't changed it for several months). Please, let me know if I'm overlooking at something or if I can try anything to debug more in depth... Thanks in advance, Eric PS: actually the CVS is accesible from outside, so you might want to try yourself! # Sample stunnel configuration file # Copyright by Michal Trojnara 2002 setuid = root setgid = root # Authentication stuff verify = 2 CAfile = /etc/ssl/stunnel/lifl-cvs.pem # Use it for client mode client = yes #debug = 7 #output = /home/eric/busy/stunnel.log connect = cvs.lifl.fr:2405

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Re: Flyspray task #7 - CRLfile is never refreshed
by Kartik Subbarao 27 Aug '05

27 Aug '05

I wanted to follow up on this. Flyspray did not let me add a comment since the bug is closed, so I'm posting to the mailing list. 1. I tried using CRLpath (and setting up the symbolic link properly to the hashed value), but that had the same behavior as CRLfile. It only reads the actual CRL once. If I update the file on disk, it never re-reads the file. So I don't see how this is a workaround. Am I missing something? 2. As I mentioned in my initial report, it is a significant disruption for existing stunnel processes to be killed. If it were possible just to kill the main daemon without also killing the child processes (i.e. like sshd), that could be a workaround. But currently, killing the main stunnel process also kills all child stunnel processes. I guess I don't understand what else one could do in this situation, apart from having the application properly reread the CRL on a regular basis. (OCSP is not yet available). When you say that "that's how openssl works", are you saying that the API does not allow you to reread/reload the CRL file? That seems rather odd. It seems like there should be some kind of way to refresh the OpenSSL data structures that store the CRL. Any thoughts/suggestions would be appreciated. Thanks, -Kartik Michal.Trojnara(a)mirt.net wrote: > Notice from stunnel > > Michal Trojnara (mtrojnar) has closed the following task. You are > receiving this because you are on the notification list. > > Task #7: CRLfile is never refreshed > The reason for closing is: Not a bug > That's how OpenSSL work. There are two workarounds: > 1. Use CRLpath instead of CRLfile (I recommend it). > 2. Restart stunnel after the CRL file modification. > > You can get more information about this task at the following URL: > http://stunnel.mirt.net/flyspray/index.php?do=details&id=7 > >

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[stunnel patch] updated transparent proxy on linux 2.6 using cttproxy patch
by MAtteo HCE Valsasna 26 Aug '05

26 Aug '05

hello folks, here comes an improved version of the transparent proxy patch, basically solving the previous TODO issues. please try it if you are interested in transparent stunnel. any feedback il welcome. the code is heavly based on the examples distributed along with the cttproxy patch, many thanks to Balzs Scheidler for its great work and to Lennert Buytenhek for the skaidrus example program. this code is (re)distributed under the GPL version 2 MAtteo ---README--- cttproxy patch to stunnel MAtteo HCE Valsasna (matteo dot valsasna at uninsubria dot it) based on example code in cttproxy patch ports stunnel transparent proxy to cttproxy kernel patch allow stunnel server to connect to the application server faking the stunnel client's IP source address. the server sees connections coming from the stunnel client's IP address instead of that of the stunnel server, and thus can apply admission control, bandwidth control, logging policies as if the client connected directly. should work 2.4 and 2.6 kernels and 2.0.x cttproxy patch tested with kernel 2.6.12.5 and cttproxy-2.6.12-2.0.2 patch setup: * application server(s): here run the application(s) you want to access trough stunnel must route all traffic, or at least all traffic for transproxyed connections, trough the stunnel server * stunnel server: must not be the same host as the application server grab recent kernel source patch your kernel source with the appropriate cttproxy patch (from http://www.balabit.com/products/oss/tproxy/) configure kernel with: CONFIG_IP_NF_TPROXY=m CONFIG_IP_NF_MATCH_TPROXY=m CONFIG_IP_NF_TARGET_TPROXY=m make and install kernel reboot and choose patched kernel load tproxy kernel modules # modprobe iptable_tproxy # modprobe ipt_tproxy enable ip forwarding (this must act as a router) # echo 1 > /proc/sys/net/ipv4/ip_forward grab stunnel source and extract it $ tar xzf stunnel-4.11.tar.gz patch it $ patch -p0 < cttproxy.patch configure selecting tproxy support $ ./configure --enable-tproxy make and install $ make # make install run stunnel in server mode with transparent = yes remote = <application server>:<port> in conf file * stunnel client run plain stunnel, client = yes remote = stunnel server * application client may or may not be the same host as the stunnel client connect to stunnel client to talk securely to application server ---PATCH---diff -crb /tmp/stunnel-4.11/configure stunnel-4.11/configure *** /tmp/stunnel-4.11/configure 2005-07-09 23:00:44.000000000 +0200 --- stunnel-4.11/configure 2005-08-25 16:59:57.000000000 +0200 *************** *** 463,469 **** # include <unistd.h> #endif" ! ac_subst_vars='SHELL PATH_SEPARATOR PACKAGE_NAME PACKAGE_TARNAME PACKAGE_VERSION PACKAGE_STRING PACKAGE_BUGREPORT exec_prefix prefix program_transform_name bindir sbindir libexecdir datadir sysconfdir sharedstatedir localstatedir libdir includedir oldincludedir infodir mandir build_alias host_alias target_alias DEFS ECHO_C ECHO_N ECHO_T LIBS INSTALL_PROGRAM INSTALL_SCRIPT INSTALL_DATA CYGPATH_W PACKAGE VERSION ACLOCAL AUTOCONF AUTOMAKE AUTOHEADER MAKEINFO install_sh STRIP ac_ct_STRIP INSTALL_STRIP_PROGRAM mkdir_p AWK SET_MAKE am__leading_dot AMTAR am__tar am__untar build build_cpu build_vendor build_os host host_cpu host_vendor host_os CC CFLAGS LDFLAGS CPPFLAGS ac_ct_CC EXEEXT OBJEXT DEPDIR am__include am__quote AMDEP_TRUE AMDEP_FALSE AMDEPBACKSLASH CCDEPMODE am__fastdepCC_TRUE am__fastdepCC_FALSE EGREP LN_S ECHO AR ac_ct_AR RANLIB ac_ct_RANLIB CPP CXX CXXFLAGS ac_ct_CXX CXXDEPMODE am__fastdepCXX_TRUE am__fastdepCXX_FALSE CXXCPP F77 FFLAGS ac_ct_F77 LIBTOOL ssldir RANDOM_FILE USE_DH USE_IPv6 LIBOBJS LTLIBOBJS' ac_subst_files='' # Initialize some variables set by options. --- 463,469 ---- # include <unistd.h> #endif" ! ac_subst_vars='SHELL PATH_SEPARATOR PACKAGE_NAME PACKAGE_TARNAME PACKAGE_VERSION PACKAGE_STRING PACKAGE_BUGREPORT exec_prefix prefix program_transform_name bindir sbindir libexecdir datadir sysconfdir sharedstatedir localstatedir libdir includedir oldincludedir infodir mandir build_alias host_alias target_alias DEFS ECHO_C ECHO_N ECHO_T LIBS INSTALL_PROGRAM INSTALL_SCRIPT INSTALL_DATA CYGPATH_W PACKAGE VERSION ACLOCAL AUTOCONF AUTOMAKE AUTOHEADER MAKEINFO install_sh STRIP ac_ct_STRIP INSTALL_STRIP_PROGRAM mkdir_p AWK SET_MAKE am__leading_dot AMTAR am__tar am__untar build build_cpu build_vendor build_os host host_cpu host_vendor host_os CC CFLAGS LDFLAGS CPPFLAGS ac_ct_CC EXEEXT OBJEXT DEPDIR am__include am__quote AMDEP_TRUE AMDEP_FALSE AMDEPBACKSLASH CCDEPMODE am__fastdepCC_TRUE am__fastdepCC_FALSE CPP LN_S RANLIB ac_ct_RANLIB EGREP ECHO AR ac_ct_AR CXX CXXFLAGS ac_ct_CXX CXXDEPMODE am__fastdepCXX_TRUE am__fastdepCXX_FALSE CXXCPP F77 FFLAGS ac_ct_F77 LIBTOOL ssldir RANDOM_FILE USE_DH USE_IPv6 USE_TPROXY LIBOBJS LTLIBOBJS' ac_subst_files='' # Initialize some variables set by options. *************** *** 1037,1042 **** --- 1037,1043 ---- --disable-rsa Disable RSA support --enable-dh Enable DH support --enable-ipv6 Enable IPv6 support + --enable-tproxy Enable linux 2.6 tproxy patch support --disable-libwrap Disable TCP wrappers library support Optional Packages: *************** *** 23166,23171 **** --- 23344,23367 ---- fi; + # use linux 2.[46] tproxy patch + echo "$as_me:$LINENO: checking whether to enable transparent proxyng using linux 2.46 tproxy patch" >&5 + echo $ECHO_N "checking whether to enable transparent proxyng using linux 2.46 tproxy patch... $ECHO_C" >&6 + # Check whether --enable-tproxy or --disable-tproxy was given. + if test "${enable_tproxy+set}" = set; then + enableval="$enable_tproxy" + echo "$as_me:$LINENO: result: yes" >&5 + echo "${ECHO_T}yes" >&6; cat >>confdefs.h <<\_ACEOF + #define USE_TPROXY 1 + _ACEOF + + else + echo "$as_me:$LINENO: result: no" >&5 + echo "${ECHO_T}no" >&6 + + fi; + + # Disable use of libwrap (TCP wrappers) # it should be the last check! echo "$as_me:$LINENO: checking whether to disable TCP wrappers library support" >&5 *************** *** 23987,23992 **** --- 24184,24190 ---- s,@RANDOM_FILE@,$RANDOM_FILE,;t t s,@USE_DH@,$USE_DH,;t t s,@USE_IPv6@,$USE_IPv6,;t t + s,@USE_TPROXY@,$USE_TPROXY,;t t s,@LIBOBJS@,$LIBOBJS,;t t s,@LTLIBOBJS@,$LTLIBOBJS,;t t CEOF diff -crb /tmp/stunnel-4.11/configure.ac stunnel-4.11/configure.ac *** /tmp/stunnel-4.11/configure.ac 2005-07-09 22:58:05.000000000 +0200 --- stunnel-4.11/configure.ac 2005-08-25 16:56:33.000000000 +0200 *************** *** 14,21 **** --- 14,24 ---- if test "$GCC" = "yes" then CFLAGS="$CFLAGS -Wall -Wshadow -Wcast-align -Wpointer-arith" fi + AC_PROG_CPP AC_PROG_INSTALL + AC_PROG_LN_S AC_PROG_MAKE_SET + AC_PROG_RANLIB # Checks for typedefs, structures, and compiler characteristics # AC_C_CONST *************** *** 254,259 **** --- 257,271 ---- ) AC_SUBST(USE_IPv6) + # use linux 2.[46] tproxy patch + AC_MSG_CHECKING([whether to enable transparent proxyng using linux 2.[46] tproxy patch]) + AC_ARG_ENABLE(tproxy, + [ --enable-tproxy Enable linux 2.6 tproxy patch support], + [AC_MSG_RESULT([yes]); AC_DEFINE(USE_TPROXY)], + [AC_MSG_RESULT([no])] + ) + AC_SUBST(USE_TPROXY) + # Disable use of libwrap (TCP wrappers) # it should be the last check! AC_MSG_CHECKING([whether to disable TCP wrappers library support]) diff -crb /tmp/stunnel-4.11/src/client.c stunnel-4.11/src/client.c *** /tmp/stunnel-4.11/src/client.c 2005-07-02 08:55:58.000000000 +0200 --- stunnel-4.11/src/client.c 2005-08-26 16:01:34.000000000 +0200 *************** *** 44,49 **** --- 44,65 ---- #define SHUT_RDWR 2 #endif + #ifdef USE_TPROXY + #define LINUX_NETFILTER + #define LINUX_TPROXY + #define TPROXY_MAJOR_VERSION(x) ((x >> 24) & 0xff) + #define TPROXY_MINOR_VERSION(x) ((x >> 16) & 0xff) + #define TPROXY_PATCH_VERSION(x) (x & 0xffff) + #endif + + /* transparent proxy */ + #ifdef LINUX_NETFILTER + #include <linux/netfilter_ipv4.h> + #endif + #ifdef LINUX_TPROXY + #include <linux/netfilter_ipv4/ip_tproxy.h> + #endif + /* TCP wrapper */ #ifdef USE_LIBWRAP #include <tcpd.h> *************** *** 77,82 **** --- 93,103 ---- static int connect_wait(CLI *, int, int); static void reset(int, char *); + #ifdef USE_TPROXY + static int determine_source_address(struct sockaddr_in *destination, + struct sockaddr_in *source); + #endif + int max_clients; #ifndef USE_WIN32 int max_fds; *************** *** 921,926 **** --- 942,954 ---- int s; /* destination socket */ u16 i; + // struct in_addr *local=NULL; + #ifdef USE_TPROXY + int f; + struct in_tproxy itp; + struct sockaddr_in tproxy_sin; + #endif + /* setup address_list */ if(c->opt->option.delayed_lookup) { resolved_list.num=0; *************** *** 945,959 **** if(alloc_fd(s)) return -1; ! if(c->bind_addr.num) { /* explicit local bind or transparent proxy */ memcpy(&bind_addr, &c->bind_addr.addr[0], sizeof(SOCKADDR_UNION)); if(bind(s, &bind_addr.sa, addr_len(bind_addr))<0) { sockerror("bind transparent"); closesocket(s); return -1; } } /* try to connect for the 1st time */ s_ntop(c->connecting_address, &addr); s_log(LOG_DEBUG, "%s connecting %s", --- 973,1066 ---- if(alloc_fd(s)) return -1; ! if(c->bind_addr.num ! #ifdef USE_TPROXY ! /* if we're using the tproxy patch, transparent proxy is ! handled below */ ! && !c->opt->option.transparent ! #endif ! ) { ! /* explicit local bind, not tproxy transparent mode */ ! memcpy(&bind_addr, &c->bind_addr.addr[0], sizeof(SOCKADDR_UNION)); if(bind(s, &bind_addr.sa, addr_len(bind_addr))<0) { sockerror("bind transparent"); closesocket(s); return -1; } + sockerror("local bind succeeded"); } + #ifdef USE_TPROXY + if (c->opt->option.transparent){ + /* transparent proxy support on 2.[46] linux kernels */ + /* added by MAtteo HCE Valsasna (matteo.valsasna(a)uninsubria.it), 20050826 */ + /* requires tproxy kernel patch (http://www.balabit.com/products/oss/tproxy */ + /* based on examples in cttproxy patch */ + /* this patch is released under the GNU General Public Licence, Version 2 */ + + memcpy(&bind_addr, &c->bind_addr.addr[0], sizeof(SOCKADDR_UNION)); + + /* check tproxy version */ + itp.op = TPROXY_VERSION; + itp.v.version = 0x00000000; + + getsockopt(s, SOL_IP, IP_TPROXY, &itp, &f); + s_log(LOG_NOTICE, "TPROXY_VERSION: %d.%d.%d", + TPROXY_MAJOR_VERSION(itp.v.version), + TPROXY_MINOR_VERSION(itp.v.version), + TPROXY_PATCH_VERSION(itp.v.version)); + + /* conservative: accepting only tproxy version 2.0.x */ + if (TPROXY_MAJOR_VERSION(itp.v.version) != 2 || + TPROXY_MINOR_VERSION(itp.v.version) != 0) + { + s_log(LOG_ERR, "unsupported tproxy version: %x (2.0.x required)", itp.v.version); + return -1; + } + + tproxy_sin.sin_family = AF_INET; + if (determine_source_address(&addr.in, &tproxy_sin) < 0){ + sockerror("determine_source_address"); + return -1; + } + + /* do not request a specific source port */ + tproxy_sin.sin_port = htons(0); + + /* bind to local source address */ + /* needed for tproxy magic */ + if (bind(s, (struct sockaddr *) &tproxy_sin, sizeof(tproxy_sin)) == -1) + { + sockerror("bind"); + return -1; + } + s_log(LOG_NOTICE, "bound to local: %s", inet_ntoa(tproxy_sin.sin_addr)); + + /* assign foreign address */ + itp.op = TPROXY_ASSIGN; + itp.v.addr.faddr = bind_addr.in.sin_addr; + itp.v.addr.fport = 0; + + if (setsockopt(s, SOL_IP, IP_TPROXY, &itp, sizeof(itp)) == -1) + { + s_log(LOG_NOTICE, "error assigning foreign address: %s", inet_ntoa(bind_addr.in.sin_addr)); + sockerror("setsockopt(SOL_IP, IP_TPROXY, TPROXY_ASSIGN)"); + return -1; + } + s_log(LOG_NOTICE, "assigned foreign address: %s", inet_ntoa(bind_addr.in.sin_addr)); + + /* set connect flag on socket */ + itp.op = TPROXY_FLAGS; + itp.v.flags = ITP_CONNECT|ITP_ONCE; + if (setsockopt(s, SOL_IP, IP_TPROXY, &itp, sizeof(itp)) == -1) + { + sockerror("setsockopt(SOL_IP, IP_TPROXY, TPROXY_FLAGS)"); + return -1; + } + } + #endif + /* try to connect for the 1st time */ s_ntop(c->connecting_address, &addr); s_log(LOG_DEBUG, "%s connecting %s", *************** *** 1020,1023 **** --- 1127,1175 ---- log_error(LOG_DEBUG, get_last_socket_error(), txt); } + + #ifdef USE_TPROXY + + /* from skaidrus */ + static int determine_source_address(struct sockaddr_in *destination, + struct sockaddr_in *source) + { + struct sockaddr_in addr; + socklen_t addrlen; + char textaddr[32]; + int sock; + + sock = socket(AF_INET, SOCK_DGRAM, 0); + if (sock < 0) { + syslog(LOG_CRIT, "determine_source_address: error " + "%d while creating socket", errno); + abort(); + } + + addr = *destination; + addr.sin_port = htons(80); + if (connect(sock, (struct sockaddr *)&addr, sizeof(addr)) < 0) { + syslog(LOG_ALERT, "determine_source_address: error %d " + "while looking up route for %d", errno, + inet_aton(textaddr, &(addr.sin_addr))); + close(sock); + return -1; + } + + addrlen = sizeof(*source); + if (getsockname(sock, (struct sockaddr *)source, &addrlen) < 0) { + syslog(LOG_CRIT, "determine_source_address: error %d " + "while retrieving source address", errno); + abort(); + } + source->sin_port = 0; + + close(sock); + + return 0; + } + + #endif + + /* End of client.c */

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