Laurent,

Ideally, you should terminate the SSL connection on your final server. But that's not the problem here. It should work as is.

Mosty likely the problem is on the client SSL software you are using to connect to stunnel. The cipher you are trying to use DESC-CBC-SHA works with SSLv3 and TLSv1. Can you force your client to use those protocols? Maybe it is trying to negotiate SSLv2. Also are you sure it is speaking SSL instead of plain text?

You can test your connection to stunnel server with openssl s_client command. Example

openssl s_client -ssl3 -state -connect your-stunnel-ip:10443 openssl s_client -tls1 -state -connect your-stunnel-ip:10443

if this works, we found the culprit.

Regards

Jose

________________________________ From: "laurent.uk@bnpparibas.com" laurent.uk@bnpparibas.com To: josealf@rocketmail.com Cc: stunnel-users@stunnel.org; stunnel-users-bounces@stunnel.org Sent: Wed, May 4, 2011 2:05:07 AM Subject: Réf. : Re: Réf. : Re: [stunnel-users] need help error :SSL3_GET_RECORD:wrong versionnumber with cipher DES-CBC-SHA

Jose,

I use 2 servers in my configuration:

the first one who listenning on the port 10443 (where we receive encrypted traffic from software using ssl)

and the second one who listenning the port 10016 (where we receive decrypted traffic).

The first one receive the encrypted traffic, it decrypted it and send it to the second server that's why i only use the server mode on my fist server.

Do you think that i also need to change this configuration?

Cordialement,

Laurent UK

Internet   josealf@rocketmail.com 03/05/2011 19:18 Pour Laurent UK cc stunnel-users@stunnel.org, stunnel-users-bounces@stunnel.org Objet Re: Réf. :  Re: [stunnel-users] need help error :SSL3_GET_RECORD:wrong versionnumber with cipher DES-CBC-SHA

Laurent,   I'm not sure you are connecting the dots right.   I see an stunnel server configuration. In this case, your stunnel is a front-end to a service you run on host XXXX port 10016. What is that service? Is stunnel running on the same host? Note that If stunnel is not running on the same host with IP XXXX, then you may have some traffic in clear text in your network (from the device running stunnel to the device hosting the service on port 10016).

You need a client to connect to the stunnel server. Unless your client support SSL natively, you also should have an stunnel running on your client device with entries like these:

client=yes [pestip] accept = 10443 connect = Your-Stunnel-server-IP:10443   In this case your client apps connects locally to port 10443, traffic is encrypted and sent to your server listening on port 10443, where it is decripted and send to IP XXXX port 10016.

Regards,   Jose

________________________________ From: "laurent.uk@bnpparibas.com" laurent.uk@bnpparibas.com To: josealf@rocketmail.com Cc: stunnel-users@stunnel.org; stunnel-users-bounces@stunnel.org Sent: Tue, May 3, 2011 10:48:11 AM Subject: Réf. : Re: [stunnel-users] need help error :SSL3_GET_RECORD:wrong versionnumber with cipher DES-CBC-SHA

Dear Jose,

here is the configuration file of my stunnel : ; Sample stunnel configuration file by Michal Trojnara 2002-2006 ; Some options used here may not be adequate for your particular configuration ; Please make sure you understand them (especially the effect of chroot jail)

; Certificate/key is needed in server mode and optional in client mode cert = /opt/freeware/etc/stunnel/ca_nopass.pem foreground = yes syslog = yes ; Protocol version (all, SSLv2, SSLv3, TLSv1) ;sslVersion = SSLv2 sslVersion = all ;ciphers = DES-CBC-SHA ;ciphers = DES-CBC3-SHA:IDEA-CBC-MD5 ; Some security enhancements for UNIX systems - comment them out on Win32 ;chroot = /usr/local/stunnel/var/lib/stunnel ;chroot = /tmp/ ;setuid = root ;setgid = other ; PID is created inside chroot jail pid = /var/adm/stunnel_server_level1.pid

; Some performance tunings socket = l:TCP_NODELAY=1 socket = r:TCP_NODELAY=1 ;compression = rle

; Workaround for Eudora bug ;options = DONT_INSERT_EMPTY_FRAGMENTS ;options = Options_SSL ; Authentication stuff verify = 3 ; Don't forget to c_rehash CApath ; CApath is located inside chroot jail CApath = /opt/freeware/etc/stunnel/CA_files/ ; It's often easier to use CAfile ;CAfile = /opt/freeware/etc/stunnel/ca.pem ; Don't forget to c_rehash CRLpath ; CRLpath is located inside chroot jail ;CRLpath = /crls ; Alternatively you can use CRLfile ;CRLfile = /usr/local/stunnel/etc/stunnel/crls.pem

; Some debugging stuff useful for troubleshooting debug = 7

; Use it for client mode client = no ; Service-level configuration

[pesitip] accept = 10443 connect = XXXXXXX:10016

Thanks for your help.

Regards.

Laurent UK

Internet   josealf@rocketmail.com 03/05/2011 14:52

Veuillez répondre à josealf@rocketmail.com

Pour Laurent UK, stunnel-users-bounces@stunnel.org, stunnel-users@stunnel.org cc Objet Re: [stunnel-users] need help error :SSL3_GET_RECORD:wrong versionnumber with cipher DES-CBC-SHA

Laurent,

Can you post your configuration? For security, You should change the real IPs (but not the ports) before posting.

You can check:

1. Does your stunnel client config has client=yes? 2. Does your stunnel server config has client=no 3. Check your packet flow, that is: your accept/connect settings.

Regards Jose -----Original Message----- From: laurent.uk@bnpparibas.com Sender: stunnel-users-bounces@stunnel.org Date: Tue, 3 May 2011 14:16:09 To: stunnel-users@stunnel.org Subject: [stunnel-users] need help error :SSL3_GET_RECORD:wrong version                number with cipher DES-CBC-SHA

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