[SR-Users] Kamailio - passing registration to another sip server

[Daniel Tryba]

On Fri, Sep 02, 2016 at 07:13:13PM +0200, Klaus Darilion wrote:
> I see 2 solutions:
> a) fix_nated_contact
...
> b) if the Contact header must be preserved (strict clients) or if the
> registrar does not apply NAT traversal, then it is necessary to do heavy
> message rewriting and registration in the proxy too:
> - the URI in the Contact forwarded to the registrar must point to the proxy
> - this URI must be mapped by the proxy to the clients received/NAT address
> - depending on the requirements (e.g. multiple registrars, multiple domains)
> the mapping can be simple or complex

Another solution might be to use the topoh/topos modules. Haven't ever
tried it on a machine that forwards REGISTERs having glanced the topos
code it should work for any SIP message.