9 Mar
2011
9 Mar
'11
1:59 p.m.
Hi Derrick,
Edge Proxy adds a Path header with a flow token
and includes the "ob" parameter when Processing Register Requests.
Eg:
Path: <sip:VskztcQ/S8p4WPbOnHbuyh5iJvJIW3ib@ep1.example.com;lr;ob>
http://kamailio.org/docs/modules/stable/modules_k/path.html and
http://kamailio.org/docs/modules/stable/modules_k/registrar.html#id2954403
(and the two following params) might be sufficient if you're just
interested in traversing NAT via kamailio acting as a load-balancer.
It's an implementation of RFC3327, see
http://openser.org/pipermail/devel/2006-March/002142.html for a
real-world example.
It won't handle the "ob" header and various keep-alive mechanisms
proposed in RFC5626 though, but probably you can solve this with the
nat-ping features of nathelper or nat_traversal modules anyways?
Andreas