Hi all: I use ser+rtpproxy+nathelper to run as a outbound proxy.But the UAs can't receive ACK or BYE from each other before a same NAT. What's wrong with this config file? Can anybody 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="222.44.33.59" 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/registrar/registrar.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("registrar", "nat_flag", 6) 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 (! search("^Record-Route:")) { append_hf("Alex-hint: NAThelper\r\n"); fix_nated_contact(); if(method == "REGISTER") { fix_nated_register(); save_noreply("location"); }; 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; } else if (method=="ACK") { route(3); break; } else if (method=="BYE") { route(3); break; }; lookup("aliases"); if (uri!=myself) { route(1); break; }; if (!lookup("location")) { sl_send_reply("404", "User Not Found,aaa"); 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"); if(!save("location")) { sl_reply_error(); } else append_hf("Alex-hint: save location\r\n"); } route[3] { # ----------------------------------------------------------------- # CANCEL and INVITE Message Handler # ----------------------------------------------------------------- if (nat_uac_test("19")) { setflag(6); }; if (uri!=myself) { route(1); break; }; if (method == "INVITE" && !lookup("location")) { sl_send_reply("404", "User Not Found haha"); 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]") { fix_nated_contact(); if (!search("^Content-Length:\ +0")) { force_rtp_proxy(); append_hf("NAT: 1\r\n"); }; }; }