Daniel-Constantin Mierla writes:
I think Juha added a new way lately, to encode/decode source ip/port in the contact uri.
yes, but that only replaces with fix_nated_contact and can be used if someone wants to re-use tcp connections between proxy and UAs and wants to always deliver to UAs correct request-uris. tutorial is here:
http://sip-router.org/wiki/tutorials/alias-example
-- juha