[stunnel-users] No SSL handshake between stunnel in client mode and SSL server

Tue Jan 31 19:11:20 CET 2012

Hi Jose,

Thank you for your help!  Finally I made it working.

But there is one thing that is not quite clear for me.  In logs I can see
"Socket closed on read". Here it is:

2012.01.31 12:57:12 LOG7[6748:6808]: Socket closed on read
2012.01.31 12:57:12 LOG7[6748:6808]: Sending close_notify alert"

Can you please explain what it means? Why socket is closed?

Here is log:

2012.01.31 12:56:58 LOG7[6748:4740]: No limit detected for the number of
clients
2012.01.31 12:56:58 LOG5[6748:4740]: stunnel 4.52 on x86-pc-mingw32-gnu
platform
2012.01.31 12:56:58 LOG5[6748:4740]: Compiled/running with OpenSSL
0.9.8s-fips 4 Jan 2012
2012.01.31 12:56:58 LOG5[6748:4740]: Threading:WIN32 SSL:ENGINE,FIPS
Auth:none Sockets:SELECT,IPv6
2012.01.31 12:56:58 LOG5[6748:4740]: Reading configuration from file
stunnel.conf
2012.01.31 12:56:58 LOG5[6748:4740]: FIPS mode is disabled
2012.01.31 12:56:58 LOG7[6748:4740]: Compression not enabled
2012.01.31 12:56:58 LOG7[6748:4740]: Snagged 64 random bytes from C:/.rnd
2012.01.31 12:56:58 LOG7[6748:4740]: Wrote 1024 new random bytes to C:/.rnd
2012.01.31 12:56:58 LOG7[6748:4740]: PRNG seeded successfully
2012.01.31 12:56:58 LOG6[6748:4740]: Initializing SSL context for service
Router
2012.01.31 12:56:58 LOG7[6748:4740]: SSL options set: 0x05000004
2012.01.31 12:56:58 LOG6[6748:4740]: SSL context initialized
2012.01.31 12:56:58 LOG5[6748:4740]: Configuration successful
2012.01.31 12:56:58 LOG7[6748:4740]: Service Router bound FD=292 to
192.168.1.121:55555
2012.01.31 12:57:12 LOG7[6748:4740]: Service Router accepted FD=332 from
192.168.1.161:59076
2012.01.31 12:57:12 LOG7[6748:4740]: Creating a new thread
2012.01.31 12:57:12 LOG7[6748:4740]: New thread created
2012.01.31 12:57:12 LOG7[6748:6808]: Service Router started
2012.01.31 12:57:12 LOG5[6748:6808]: Service Router accepted connection
from 192.168.1.161:59076
2012.01.31 12:57:12 LOG6[6748:6808]: connect_blocking: connecting
192.168.160.169:55443
2012.01.31 12:57:12 LOG7[6748:6808]: connect_blocking: s_poll_wait
192.168.160.169:55443: waiting 10 seconds
2012.01.31 12:57:12 LOG5[6748:6808]: connect_blocking: connected
192.168.160.169:55443
2012.01.31 12:57:12 LOG5[6748:6808]: Service Router connected remote server
from 192.168.1.121:52050
2012.01.31 12:57:12 LOG7[6748:6808]: Remote FD=412 initialized
2012.01.31 12:57:12 LOG7[6748:6808]: Peer certificate was cached (1017
bytes)
2012.01.31 12:57:12 LOG6[6748:6808]: SSL connected: new session negotiated
2012.01.31 12:57:12 LOG6[6748:6808]: Negotiated ciphers: RC4-SHA SSLv3
Kx=RSA Au=RSA Enc=RC4(128) Mac=SHA1
2012.01.31 12:57:12 LOG6[6748:6808]: Compression: null, expansion: null
2012.01.31 12:57:12 LOG7[6748:6808]: Socket closed on read
2012.01.31 12:57:12 LOG7[6748:6808]: Sending close_notify alert
2012.01.31 12:57:12 LOG6[6748:6808]: SSL_shutdown successfully sent
close_notify alert
2012.01.31 12:57:22 LOG3[6748:6808]: transfer: s_poll_wait: TIMEOUTclose
exceeded: closing
2012.01.31 12:57:22 LOG5[6748:6808]: Connection closed: 200 bytes sent to
SSL, 1 bytes sent to socket
2012.01.31 12:57:22 LOG7[6748:6808]: Service Router finished (0 left)

Best regards,
Denis

2012/1/25 Jose Alf. <josealf at rocketmail.com>

> Denis,
>
> Please review this:
>
> http://stunnel.mirt.net/pipermail/stunnel-users/2011-May/003080.html
>
> In particular, check that you have your signing CA certificates (hashed)
> in your CaPath.
>
> Do the tests with openssl connect and post sanitized results if you are in
> trouble.
>
> Regards,
> Jose
>
>   ------------------------------
> *From:* Denis Berezhnoy <denis.berezhnoy at gmail.com>
> *To:* Jose Alf. <josealf at rocketmail.com>
> *Cc:* "stunnel-users at stunnel.org" <stunnel-users at stunnel.org>
> *Sent:* Wednesday, January 25, 2012 9:55 AM
> *Subject:* Re: [stunnel-users] No SSL handshake between stunnel in client
> mode and SSL server
>
> Hi Jose,
>
> Thank you for your reply. I double checked and actually there is SSL
> handshake. Sorry, it was my mistake I did not analyze WireShark capture
> carefully.
>
> But handshake failed and here is stunnel log:
>
> 2012.01.25 09:39:58 LOG5[1944:6264]: stunnel 4.52 on x86-pc-mingw32-gnu
> platform
> 2012.01.25 09:39:58 LOG5[1944:6264]: Compiled/running with OpenSSL
> 0.9.8s-fips 4 Jan 2012
> 2012.01.25 09:39:58 LOG5[1944:6264]: Threading:WIN32 SSL:ENGINE,FIPS
> Auth:none Sockets:SELECT,IPv6
> 2012.01.25 09:39:58 LOG5[1944:6264]: Reading configuration from file
> stunnel.conf
> 2012.01.25 09:39:58 LOG5[1944:6264]: FIPS mode is enabled
> 2012.01.25 09:39:58 LOG5[1944:6264]: Configuration successful
> 2012.01.25 09:40:13 LOG5[1944:4724]: Service Router accepted connection
> from 192.168.1.161:59519
> 2012.01.25 09:40:13 LOG5[1944:4724]: connect_blocking: connected
> 192.168.160.168:55443
> 2012.01.25 09:40:13 LOG5[1944:4724]: Service Router connected remote
> server from 192.168.1.121:52250
> 2012.01.25 09:40:13 LOG3[1944:4724]: SSL_connect: 1408F10B:
> error:1408F10B:SSL routines:SSL3_GET_RECORD:wrong version number
> 2012.01.25 09:40:13 LOG5[1944:4724]: Connection reset: 0 bytes sent to
> SSL, 0 bytes sent to socket
> Server is setup for SSL3.0.
>
> Best regards,
> Denis
>
> 2012/1/24 Jose Alf. <josealf at rocketmail.com>
>
> Denis,
>
> Looks like your configuration is incomplete. Check  the sample
> stunnel.conf file in the stunnel distribution. Read the man page. Post your
> log file.
>
> Try adding lines like these before [Router]
>
> sslVersion = SSLv3
>
> cert=stunnel.pem
> key=stunnel.pem
>
> # Authentication stuff, try 0 for test
> verify = 0
>
> CApath = /your/CAcerts/path
>
> debug = 7
> output = stunnel.log
>
>
>
>   ------------------------------
> *From:* Denis Berezhnoy <denis.berezhnoy at gmail.com>
> *To:* stunnel-users at stunnel.org
> *Sent:* Tuesday, January 24, 2012 6:10 PM
> *Subject:* [stunnel-users] No SSL handshake between stunnel in client
> mode and SSL server
>
> Hi guys,
> I have a quick question. I am trying to use stunnel in client mode to
> encrypt traffic going to my server.
> Basically, I have a server which listens for SSL connection. And I have a
> client which can not do SSL but it needs to communicate with server over
> SSL.
> I setup stunnel in client mode to accept unecrypted traffic from client
> and redirect it to server over SSL. I checked TCP traffic with WireShark
> between stunnel  and my server and I can see that there is no SSL
> handshake, stunnel makes TCP connection with server and sends some TCP
> packets but I expect to see SSL handshake.
> My stunnel conf file is here:
> [Router]
> client=yes
> accept = 192.168.1.121:55555
> connect = 192.168.160.168:55443
> Can you please comment on this?
> Best regards,
> Denis
>
> _______________________________________________
> stunnel-users mailing list
> stunnel-users at stunnel.org
> http://stunnel.mirt.net/mailman/listinfo/stunnel-users
>
>
>
>
>
>
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