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

Am 25.08.2016 um 16:19 schrieb E. Schmidbauer: Just a comment (I found this thread as I currently have the some problem). Both provided solutions do use PATH which of course requires PATH support on the registrar. If the reigstrar does not support PATH then things get complicated. I see 2 solutions: a) if the registrar does NAT traversal (and thus always send SIP messages to the IP:port it received the REGISTER), does not manipulate the received Contact header and the client does not care about manipulated Contact header it may be possible by just applying "fix_nated_contact()" and route messages from the registrar to the client by using the R-URI in the incoming request. 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 Thus, I think a generic solution for registrars without PATH support involves plenty of message manipulation and lot of time and testing. regards Klaus