[OpenSIPS-Users] NAT and media/signaling IPs different

[Jeff Pyle]

Hello,

In my experience with SIP thus far I've been rather insulated from the ill
effects of NAT on SIP and RTP.  My honeymoon is over.

In every NAT-supporting commercial SBC I've seen the signaling IP is the
same as the media IP.  Is this necessary?  In Opensips/Mediaproxy terms,
does Opensips need to be operating on the same IP address as the media
relay?

The clients in this case are things like X-Lite, Linksys ATAs or Polycom IP
handsets behind dumb Linksys/Netgear/D-Link/whatever residential gateway
style wireless routers.


Thanks,
Jeff