[SR-Users] Kamailio IMS NAT issue: PRACK/ACK RURI changing in P-CSCF

Owais Millennium.Bug at Gmail.com
Mon Sep 26 23:37:32 CEST 2016

Hi Franz,

Sorry for the misunderstanding, none of the nodes are "local only". Its a
private address that they're listening to. 

As for the issue, source UE sends correct ACK with the right RURI
(containing the correct IP and port of the destination UE). 

But P-CSCF strips that alias parameter off such that the ACK ends up going
to the *wrong port* of destination UE. It seems that the proxy is not
honouring the alias that was added. (same is the case with PRACK).

Has anyone else experienced the same issue?

I am using the default examples of kamailio pcscf git master version.

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