Cool, I will check that out.  Thank you.  :)



Robert Remsik

Telecom

Desk Phone: 970 491 7120

[email protected]

________________________________
From: Daniel-Constantin Mierla <[email protected]>
Sent: Tuesday, February 20, 2018 1:16:59 AM
To: Kamailio (SER) - Users Mailing List; Remsik,Robert
Subject: Re: [SR-Users] Kamailio 4.3 decrypting SIP-TLS


Hello,


for Kamailio v4.3 you can print is syslog the $mb as it was suggested in the 
other response 
(https://lists.kamailio.org/pipermail/sr-users/2018-February/100378.html), you 
can do that in request_route or onreply_route. In onsend_route you can print 
$snd(buf).


Then there is siptrace module that can work standalone and store sip traffic in 
a database table.


If you have a production system with lot of traffic, Homer Sipcapture project 
might be something to consider -- kamailio has the modules siptrace and 
sipcapture.


I also want to highlight that v5.1 has a new module sipdump that should 
simplify the capture of sip traffic:


  * https://www.kamailio.org/docs/modules/stable/modules/sipdump.html


I added it because I needed to look at tls traffic while developing/debugging.


Cheers,
Daniel

On 16.02.18 21:28, Remsik,Robert wrote:

Hello!


I'm working on setting up our kamailio instance to use TLS for inter-phone 
communication and so far I've been able to configure the GUI and get it to work 
which is great.  However, I'm trying to grab a packet capture and decode the 
TLS session to get the SIP ladder (so I can troubleshoot issues) and so far 
I've been unable to.  I've been following the article at: 
http://packetpushers.net/using-wireshark-to-decode-ssltls-packets/ and using 
the kamailio self-signed cert as I think that's the cert being used with no 
success.  I'm getting the Cipher Suite: TLS_RSA_WITH_AES_256_CBC_SHA (0x0035) 
which doesn't use perfect forward secrecy so it should be able to be decoded.


Is there a way to decode the kamailio TLS encoded communications so I can 
troubleshoot issues that may come up?

Thank you in advance,
Robert




Robert Remsik

Telecom

Desk Phone: 970 491 7120

[email protected]<mailto:[email protected]>



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