Hi, I'm trying opensips and pjsua (pjlib) and encounter a problem in the registry when the client is behind a NAT. The client parser throws an exception because of the contact header has sip: host: port1: port2: PortNo Example: Contact: <sip:7020 at 192.168.2.84:17737:19222> It seems a problem when opensips rewrites the "contact uri"