[Kamailio-Users] add_path_received and OBP problems

[Florian Meister]

> For SIP NAT traversal. Almost all SIP clients are symmetric
> (send/receive SIP on the same port) - thus by always use the "received"
> information instead of the provided "Contact" you should not have
> negative impacts. Exception: IIRC, I once saw Cisco SIP phones behind a
> Cisco PIX which were asymmetric (can't remember if it was SIP or RTP).

I see. So I'll do it the same.

>   + some countries require lawful intercept, which must not be
> noticeable by the costumer. As the LI requires a media relay (to record
> audio) you do not have a choice and have to activate the media relay
> for
> all calls anyway.

I have exactly that problem, so I already proxying all rtp-traffic via rtpproxy.