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

[Owais]

Hi all,
My scenario is as follows:
I have All the CSCFs on the same IP using different ports.
P-CSCF advertises a public IP. Rest of the nodes including I-CSCF and S-CSCF
listen local only.

Behavior: When an ACK or PRACK goes from P-CSCF to S-CSCF, the RURI changes
such that alias parameter is removed.
Hence, P-CSCF ends up sending PRACK and ACK on private IP of UE.

Here's what the config looks like:



Any hints?



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