[SR-Users] Issue with INVITE to NATed client

[Daniel Tryba]

On Fri, May 05, 2017 at 03:56:10PM +0100, Iskren Hadzhinedev wrote:
> However, when a call comes from PSTN to the client, kamailio sends the
> INVITE to the client's RFC1918 IP and I can't figure out how to send it to
> the correct destination. I tried loading the registrar and usrloc modules
> and used save("location") during REGISTER and lookup("location") just before
> loose_route(), but the end result was that kamailio replied to REGISTERs
> with any username/password with a 200 OK and the endpoints never registered
> with the PBX.

If the PBX support Path, add the headers to the REGISTER in kamailio.
Else you have to mangle the contact header before relaying
(add_contact_alias) and use that in INVITEs to the client (handle_ruri_alias)