Check any firewalls and inspect some traces if you haven't. Never know what you'll find. We've seen tcp messages not properly reconstructing on some setups on just one port for some reason (not having anything to do with Kamailio). You could also try a non-standard port to see if it is any different. No reason it must be 5060/5061.

Might check out some of the tcp parameters as well. This one in particular we are trying out disabled because with it on certain requests go out an ephemeral port that we don't have set up in our iptables. With it disabled it goes out a standard listening port we have setup and is preferred.

You should also set debug=3 for clues if you haven't. I suggest providing more detail if you don't figure it out. Could be so many different things.

Regards,
Ryan

On Thu, Jun 18, 2015 at 4:22 PM, Ankhit Vivekananda <ankhit.vivekananda@biscotti.com> wrote:
Hello,

I have configured kamailio 4.0.4 long back. Now, I wanted to enable the usage of port 5061 with TLS. By doing so, the client(video camera) can place outgoing calls fine. But while receiving an incoming call, the message does not get sent out to the other client. Hence, the call fails. I can place and receive calls on port 5060 successfully without any issues. Can anyone please tell me why port 5061 is giving me a problem.

Also, as a test, I set up kamailio on another machine(version 4.1) and 5061 works fine in all directions. Its only on the other machine that I have problems with. 

Appreciate any help!

Thank you,
Ankhit

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