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 <[email protected]>
To: Jose Alf. <[email protected]>
Cc: "[email protected]" <[email protected]>
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. <[email protected]>

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 <[email protected]>
To: [email protected]
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

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