Hello All,
thank you for valuable responses.
According to Paul, Proxies MUST NOT modify SDP in INVITE, but SBC CAN do it,
It depends on implementation.
So, in SBC case with NAT traversal feature, if 2 c= lines exist in SDP, 1
at session level and 1 at media level, what is the correct behaviour
how can proxies edit c line in sdp? which rules can be applied to c line by
proxies?
I have a sip client behind nat which insert its own private IP at session
level (c line under m line)
and NAT adds its own public IP into c line at media level before forwarding
200 OK to proxy.
Here, proxy remove
