[OpenSIPS-Users] Safe place and way to change the Contact header without killing loose route

[Nick Khamis]

Hello Everyone,

We have our OpenSIPS box behind nat, and would like a safe place to
change the Contact header to a public IP without messing up our
loose/recorded routes. We attempted to do it in on_reply but got the
following result:

Via: SIP/2.0/UDP
73.14.112.21;rport=5060;received=73.14.112.21;branch=z9hG4bKe1c.5cc516a1.2.
Via: SIP/2.0/UDP
73.14.112.21;rport=5060;received=73.14.112.21;branch=z9hG4bKe1c.5cc516a1.2.
Via: SIP/2.0/UDP
73.14.112.21;rport=5060;received=73.14.112.21;branch=z9hG4bKe1c.5cc516a1.2.
Via: SIP/2.0/UDP
73.14.112.21;rport=5060;received=73.14.112.21;branch=z9hG4bKe1c.5cc516a1.2.
Via: SIP/2.0/UDP
73.14.112.21;rport=5060;received=73.14.112.21;branch=z9hG4bKe1c.5cc516a1.2.
Via: SIP/2.0/UDP
73.14.112.21;rport=5060;received=73.14.112.21;branch=z9hG4bKe1c.5cc516a1.2.
Via: SIP/2.0/UDP
73.14.112.21;rport=5060;received=73.14.112.21;branch=z9hG4bKe1c.5cc516a1.2.

Kind Regards,

Nick