RE: [Serusers] Nathelper question

The following routine should give you a general idea how to handle this situation. Basically, don't do rtp proxy when both caller and callee are behind same NAT. Just change their contact address for signalling. Flag 4 is set when the caller is behind NAT. Flag 5 is set when the callee is behind NAT. if (method=="INVITE") { if (isflagset(4) && isflagset(5)) { /* NAT source & NAT dest. */ if (!exec_msg('echo $SIP_RURI | cut -d: -f2 | cut -d@ -f2 | grep "$SIP_SRCIP" > /dev/null')) { xlog("L_NOTICE", "UAs behind different NAT devices, forcing rtpproxy\n"); force_rtp_proxy(); t_on_reply("2"); } else { xlog("L_NOTICE", "UAs behind same NAT devices\n"); t_on_reply("3"); } ... Other situation, NAT -> Public, Public -> NAT ... } onreply_route[2] { if (t_check_status("200") || t_check_status("183")) { if (isflagset(5)) { fix_nated_contact(); }; force_rtp_proxy(); }; }; onreply_route[3] { if (t_check_status("200") || t_check_status("183")) { if (isflagset(5)) { fix_nated_contact(); }; }; };