[OpenSIPS-Users] Fixing the Contact Header for NAT

Iñaki Baz Castillo ibc at aliax.net
Fri Nov 28 13:23:04 CET 2008

El Viernes, 28 de Noviembre de 2008, Juan Backson escribió:
> SIP/2.0 200 OK
> Via: SIP/2.0/UDP
> Record-Route: <sip:;lr=on;ftag=795a0d32;nat=yes>

This Record-Route means that the UAC MUST send the ACK to address adding a Route header with same content. Is it feasible for the 
UAC to send the ACK to that private address?

> Contact: <sip:mod_sofia at 233.32.345.5:5800;transport=udp>

This Contact means that, when the ACK arrives to the proxy, it must forward it 
to address 233.32.345.5:5800 (since proxy does loose_routing and deletes top 

Iñaki Baz Castillo

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