Hi Fred, I have advertised the udp port in kamailio.cfg like below - listen=udp:192.168.1.x:5060 advertise 182.70.xx.yy:5060 But how to advertise rtp Ports?? I have attached sip.conf *Asterisk 1----\ * * \ ------ **Kamailio+RTPPROXY ----** FW (pfsense **182.75.xx.yy public-IP)**--- INTERNET** \ **(private ip - 192.168.1.x)* *Asterisk n------\ * *Th**anks & Regards,* *Arish Haque* _______________________________________________ Kamailio (SER) - Users Mailing List sr-users(a)lists.kamailio.org https://lists.kamailio.org/cgi-bin/mailman/listinfo/sr-users