Hello!
This is probably caused by SIP ALG in the NAT router. Compare what the client sends to what you receive on the server.
With kind regards Pan B. Christensen Developer Phonect AS
-----Original Message----- From: sr-users sr-users-bounces@lists.kamailio.org On Behalf Of Social Boh Sent: onsdag 9. mai 2018 18:32 To: sr-users@lists.kamailio.org Subject: [SR-Users] Understanding port changing
Hello list,
I'm looking for to understand a problem have with Kamailio.
The configuration is:
user (behind NAT) -> Kamilio (Public IP) -> user (behind NAT)
When I make a call from user A to user B (both registered) , User B receive the INVITE correctly but in the ringing SIP message change the port present on the Contact Header and same think on 200OK so when Kamailio try to send it ACK SIP message to this port fail because the Softphone listen on the port where has received the INVITE from Kamailio.
This happens with 3 different Softphone: BRIA, Xlite, Linphone on the same computer.
Thank you
Regards
--
I'm SoCIaL, MayBe
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