Hello Sergey,

Thanks for the suggestion. Not sure if his is what i'm looking for, allow me to explain further:
We set up an NetworkLoadBalancer on AWS to offload tls on it. This Load balancer is a TLS listener on the outside and a TCP connection to the proxy inside.
So when sending an INVITE to the connected client, the via has a TCP protocol like

Via: SIP/2.0/TCP mydomain:port;branch=z9hG4bKf176.53ac8af0d7090a31e44548f15ea420ff.0

and the client (linphone) disconnects and tries to contact the proxy on that address on a TCP socket, which doesn't exist. I tried many solutions none of which actually work... last one setting $du =$du + ";transport=tls" and forcing the socket to the TCP socket to the load balancer, but of course i'm getting warnings about this.

is this something that PR (not merged) would be addressing, i didn't see that.
If not, is there a way of doing this without any trickery?

Thanks!

Regards,

David Villasmil
phone: +34669448337


On Wed, May 22, 2024 at 12:16 PM Sergey Safarov <s.safarov@gmail.com> wrote:
Probable you need this PR
https://github.com/kamailio/kamailio/pull/3810

Or you can try
https://github.com/kamailio/kamailio/pull/3731
In this PR we faced the same issue and solved this.


On Wed, May 22, 2024 at 3:43 AM David Villasmil via sr-users <sr-users@lists.kamailio.org> wrote:
Hello Anthony, did you solve this problem? I'm facing the same problem

Thanks!
Regards,

David Villasmil
phone: +34669448337


On Mon, Feb 5, 2018 at 5:57 AM Anthony Alba <ascanio.alba7@gmail.com> wrote:
I have kamailio behind a TLS termination proxy so the sockets are correctly deduced to be TCP. However the clients only talk TLS to the proxy and are confused when the top Via header added by Kamailio is TCP. Is there a way for Kamailio to forcibly pretend its protocol is TLS? Like advertised_address but "advertised_protocol"  instead. 

(With pjsip testing: it has a flag use_tls which ignores TCP from Kamailio and continues to use the persistent TLS transport to proxy. Linphone fails because it tries to honor TCP in Via and is unable to establish TCP transport). 

BTW I am using t_relay_to_tcp so Kamailio will return traffic to the proxy as TCP even though the contact addresses specify transport=TLS.
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