I config a OP with public IP.And I encount a problem.Two UAs can't invite each other from a same OP. ua1(private ip)--->nat--->OP1---->register1 ua2(public ip)----->OP1-->register1 ua1---invite---->OP1 When ua1 invite ua2,OP1 return 483.The same from ua2 to ua1. What's wrong? Is my configure file something wrong? Can somebody here help me? # # $Id: ser.cfg,v 1.24 2003/11/11 15:32:36 andrei Exp $ # # simple quick-start config script # # ----------- global configuration parameters ------------------------ #debug=3 # debug level (cmd line: -dddddddddd) #fork=yes #log_stderror=no # (cmd line: -E) /* Uncomment these lines to enter debugging mode */ #log_stderror=yes #debug=4 debug =3 fork=yes log_stderror=yes check_via=no # (cmd. line: -v) dns=no # (cmd. line: -r) rev_dns=no # (cmd. line: -R) port=5070 listen="222.44.22.60" children=4 fifo="/tmp/ser_fifo" # ------------------ module loading ---------------------------------- loadmodule "/home/ser-0.9.3/modules/sl/sl.so" loadmodule "/home/ser-0.9.3/modules/tm/tm.so" loadmodule "/home/ser-0.9.3/modules/rr/rr.so" loadmodule "/home/ser-0.9.3/modules/maxfwd/maxfwd.so" loadmodule "/home/ser-0.9.3/modules/usrloc/usrloc.so" loadmodule "/home/ser-0.9.3/modules/textops/textops.so" loadmodule "/home/ser-0.9.3/modules/nathelper/nathelper.so" loadmodule "/home/ser-0.9.3/modules/uri/uri.so" # ----------------- setting module-specific parameters --------------- # -- usrloc params -- modparam("usrloc", "db_mode", 0) modparam("nathelper", "natping_interval", 30) # Ping interval 30 s modparam("nathelper", "ping_nated_only", 1) # Ping only clients behind NAT modparam("nathelper", "rtpproxy_sock", "/var/run/rtpproxy.sock") modparam("rr", "enable_full_lr", 1) # ------------------------- request routing logic ------------------- route{ # ----------------------------------------------------------------- # Sanity Check Section # ----------------------------------------------------------------- if (!mf_process_maxfwd_header("10")) { sl_send_reply("483", "Too Many Hops"); break; }; if (msg:len > max_len) { sl_send_reply("513", "Message Overflow"); break; }; #--------------- if (method == "REGISTER" || ! search("^Record-Route:")) { append_hf("Alex-hint: NAThelper\r\n"); fix_nated_register(); fix_nated_contact(); if (method == "INVITE") { append_hf("Alex-hint: SDP rewritten\r\n"); force_rtp_proxy(); }; force_rport(); setflag(6); }; #--------------- # ----------------------------------------------------------------- # Record Route Section # ----------------------------------------------------------------- if(method != "REGISTER") { record_route(); }; if (method=="BYE" || method=="CANCEL") { unforce_rtp_proxy(); } # ----------------------------------------------------------------- # Loose Route Section # ----------------------------------------------------------------- if (loose_route()) { if (has_totag() && (method=="INVITE" || method=="ACK")) { if (nat_uac_test("19")) { setflag(6); force_rport(); }; force_rtp_proxy("l"); }; append_hf("Alex-hint: Loose Route\r\n"); route(1); break; }; # ----------------------------------------------------------------- # Call Type Processing Section # ----------------------------------------------------------------- if (uri!=myself) { route(1); break; }; if (uri==myself) { if (method=="CANCEL") { route(3); break; } else if (method=="INVITE") { route(3); break; } else if (method=="REGISTER") { route(2); break; }; if (uri!=myself) { route(1); break; }; }; route(1); } route[1] { # ----------------------------------------------------------------- # Default Message Handler # ----------------------------------------------------------------- t_on_reply("1"); if (!t_relay()) { if (method=="INVITE" && isflagset(6)) { unforce_rtp_proxy(); }; sl_reply_error(); }; } route[2] { # ----------------------------------------------------------------- # REGISTER Message Handler # ---------------------------------------------------------------- if (!search("^Contact:\ +\*") && nat_uac_test("19")) { setflag(6); fix_nated_register(); force_rport(); }; sl_send_reply("100", "Trying"); } route[3] { # ----------------------------------------------------------------- # CANCEL and INVITE Message Handler # ----------------------------------------------------------------- if (nat_uac_test("19")) { setflag(6); }; if (uri!=myself) { route(1); break; }; if (isflagset(6)) { force_rport(); #fix_nated_contact(); force_rtp_proxy(); }; t_on_reply("1"); if (!t_relay()) { if(isflagset(6)) { unforce_rtp_proxy(); } sl_reply_error(); }; } onreply_route[1] { if (isflagset(6) || status=~"(180)|(183)|2[0-9][0-9]") { if (!search("^Content-Length:\ +0")) { force_rtp_proxy(); append_hf("NAT: 1\r\n"); }; }; }