[SR-Users] Does pure outbound RFC5626 work without edge proxies?

Juha Heinanen jh at tutpro.com
Sun Jul 17 08:20:57 CEST 2022

Richard Chan writes:

> This leads me to ask: for pure RFC5626 to work (no nathelper stuff at all)
> is it a must that there is a  "edge-proxy--[1]-->internal-proxy" layout?
> ...and...the flow-tokens in [1] are what make it possible to skip bogus
> Contact: header and route to an existing flow?

If UA is behind NAT and initial INVITE has contact header, BUT contact
URI does not have ;gr, I call add_contact_alias(), which "Adds an
“;alias=ip~port~transport” parameter to the contact URI containing
either received ip, port, and transport protocol".

-- Juha

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