I just posted about a problem with rtpproxy, but i was able to correct that. now ser is able to connect to rtpproxy, but media is still being lost. someone suggested i put my external ip in the listen= value at the top, but that breaks remote registration. I am following the rtpproxy section of the "Getting Started with Ser Docs" http://siprouter.onsip.org/doc/gettingstarted/ch08s02.html so one would expect i would have ser.cfg set up correctly, but obviously something is wrong. here is some ngrep output. 10.0.0.10 is SER. 10.0.0.110 is a client LOCAL to ser, and 10.0.0.100/67.84.215.54 is a remote client behind yet another nat U 10.0.0.10:6060 -> 10.0.0.110:9267 INVITE sip:1000@10.0.0.110:9267 SIP/2.0. Record-Route: <sip:10.0.0.10:6060;ftag=d752304f;lr=on>. To: <sip:1000@bmy.gotdns.org>. From: <sip:1001@bmy.gotdns.org>;tag=d752304f. Via: SIP/2.0/UDP 10.0.0.10:6060;branch=z9hG4bK44a9.9b2912a1.1. Via: SIP/2.0/UDP 10.0.0.100:9170;received=67.84.215.54;branch=z9hG4bK-d87543-71698269-1--d87543-;rport=9170. Call-ID: cc766a6d3e104232. CSeq: 2 INVITE. Contact: <sip:1001@67.84.215.54:9170>. Max-Forwards: 16. Allow: INVITE, ACK, CANCEL, OPTIONS, BYE, REFER, NOTIFY, MESSAGE, SUBSCRIBE, INFO. Content-Type: application/sdp. User-Agent: eyeBeam release 3004w stamp 16863. Content-Length: 285. . v=0. o=- 105355536 105355589 IN IP4 10.0.0.100. s=eyeBeam. c=IN IP4 10.0.0.10. t=0 0. m=audio 20026 RTP/AVP 100 6 0 8 3 18 5 101. a=alt:1 1 : 7D3DDAD1 578F25CA 10.0.0.100 9172. a=fmtp:101 0-15. a=rtpmap:100 speex/16000. a=rtpmap:101 telephone-event/8000. a=sendrecv. a=nortpproxy:yes. # U 10.0.0.110:9267 -> 10.0.0.10:6060 SIP/2.0 180 Ringing. To: <sip:1000@bmy.gotdns.org>;tag=703e0d1b. From: <sip:1001@bmy.gotdns.org>;tag=d752304f. Via: SIP/2.0/UDP 10.0.0.10:6060;branch=z9hG4bK44a9.9b2912a1.1;received=10.0.0.10. Via: SIP/2.0/UDP 10.0.0.100:9170;received=67.84.215.54;branch=z9hG4bK-d87543-71698269-1--d87543-;rport=9170. Call-ID: cc766a6d3e104232. CSeq: 2 INVITE. Record-Route: <sip:10.0.0.10:6060;ftag=d752304f;lr=on>. Contact: <sip:1000@10.0.0.110:9267>. Content-Length: 0. . # U 10.0.0.10:6060 -> 67.84.215.54:9170 SIP/2.0 180 Ringing. To: <sip:1000@bmy.gotdns.org>;tag=703e0d1b. From: <sip:1001@bmy.gotdns.org>;tag=d752304f. Via: SIP/2.0/UDP 10.0.0.100:9170;received=67.84.215.54;branch=z9hG4bK-d87543-71698269-1--d87543-;rport=9170. Call-ID: cc766a6d3e104232. CSeq: 2 INVITE. Record-Route: <sip:10.0.0.10:6060;ftag=d752304f;lr=on>. Contact: <sip:1000@10.0.0.110:9267>. Content-Length: 0. . # U 10.0.0.110:9267 -> 10.0.0.10:6060 SIP/2.0 180 Ringing. To: <sip:1000@bmy.gotdns.org>;tag=703e0d1b. From: <sip:1001@bmy.gotdns.org>;tag=d752304f. Via: SIP/2.0/UDP 10.0.0.10:6060;branch=z9hG4bK44a9.9b2912a1.1;received=10.0.0.10. Via: SIP/2.0/UDP 10.0.0.100:9170;received=67.84.215.54;branch=z9hG4bK-d87543-71698269-1--d87543-;rport=9170. Call-ID: cc766a6d3e104232. CSeq: 2 INVITE. Record-Route: <sip:10.0.0.10:6060;ftag=d752304f;lr=on>. Contact: <sip:1000@10.0.0.110:9267>. Content-Length: 0. . # U 10.0.0.10:6060 -> 67.84.215.54:9170 SIP/2.0 180 Ringing. To: <sip:1000@bmy.gotdns.org>;tag=703e0d1b. From: <sip:1001@bmy.gotdns.org>;tag=d752304f. Via: SIP/2.0/UDP 10.0.0.100:9170;received=67.84.215.54;branch=z9hG4bK-d87543-71698269-1--d87543-;rport=9170. Call-ID: cc766a6d3e104232. CSeq: 2 INVITE. Record-Route: <sip:10.0.0.10:6060;ftag=d752304f;lr=on>. Contact: <sip:1000@10.0.0.110:9267>. Content-Length: 0. and here is my ser.cfg which ive also attached. # # $Id: ser.cfg,v 1.25.2.1 2005/02/18 14:30:44 andrei Exp $ # # simple quick-start config script # # ----------- global configuration parameters ------------------------ debug=3 # debug level (cmd line: -dddddddddd) fork=no log_stderror=yes # (cmd line: -E) /* Uncomment these lines to enter debugging mode fork=no log_stderror=yes */ check_via=no # (cmd. line: -v) dns=no # (cmd. line: -r) rev_dns=no # (cmd. line: -R) listen=10.0.0.10 alias=hostname.dyndns.org port=6060 children=4 fifo="/tmp/ser_fifo" fifo_db_url="mysql://user:pw@localhost/ser" # ------------------ module loading ---------------------------------- # Uncomment this if you want to use SQL database #loadmodule "/usr/local/lib/ser/modules/mysql.so" loadmodule "/usr/local/lib/ser/modules/mysql.so" loadmodule "/usr/local/lib/ser/modules/sl.so" loadmodule "/usr/local/lib/ser/modules/tm.so" loadmodule "/usr/local/lib/ser/modules/rr.so" loadmodule "/usr/local/lib/ser/modules/maxfwd.so" loadmodule "/usr/local/lib/ser/modules/usrloc.so" loadmodule "/usr/local/lib/ser/modules/registrar.so" loadmodule "/usr/local/lib/ser/modules/auth.so" loadmodule "/usr/local/lib/ser/modules/auth_db.so" loadmodule "/usr/local/lib/ser/modules/uri.so" loadmodule "/usr/local/lib/ser/modules/uri_db.so" loadmodule "/usr/local/lib/ser/modules/nathelper.so" loadmodule "/usr/local/lib/ser/modules/textops.so" #From Getting Started modparam("auth_db|uri_db|usrloc", "db_url", "mysql://user:pw@localhost/ser") # ----------------- setting module-specific parameters --------------- # -- auth params -- # Uncomment if you are using auth module # modparam("auth_db", "calculate_ha1", yes) # # If you set "calculate_ha1" parameter to yes (which true in this config), # uncomment also the following parameter) # modparam("auth_db", "password_column", "password") modparam("nathelper", "rtpproxy_disable", 1) modparam("nathelper", "natping_interval", 30) modparam("nathelper", "rtpproxy_sock", "unix:/var/run/rtpproxy.sock") modparam("usrloc", "db_mode", 2) modparam("registrar", "nat_flag", 6) # -- rr params -- # add value to ;lr param to make some broken UAs happy modparam("rr", "enable_full_lr", 1) # ------------------------- request routing logic ------------------- # main routing logic route{ # initial sanity checks -- messages with # max_forwards==0, or excessively long requests if (!mf_process_maxfwd_header("10")) { sl_send_reply("483","Too Many Hops"); break; }; if (msg:len >= 2048 ) { sl_send_reply("513", "Message too big"); break; }; # we record-route all messages -- to make sure that # subsequent messages will go through our proxy; that's # particularly good if upstream and downstream entities # use different transport protocol if (method!="REGISTER") { record_route(); }; if (method=="BYE" || method=="CANCEL") { unforce_rtp_proxy(); } # subsequent messages withing a dialog should take the # path determined by record-routing if (loose_route()) { if ((method=="INVITE" || method=="REFER") && !has_totag()) { sl_send_reply("403", "Forbidden"); break; }; if (method=="INVITE") { if (!proxy_authorize("","subscriber")) { proxy_challenge("","0"); break; }else if (!check_from()) { sl_send_reply("403", "Use From=ID"); break; }; consume_credentials(); if (nat_uac_test("19")) { setflag(6); force_rport(); fix_nated_contact(); }; force_rtp_proxy("l"); }; route(1); break; }; #======= call type processing section if (!uri==myself) { append_hf("P-hint: outbound\r\n"); route(4); route(1); break; }; if (method=="ACK") { route(1); break; } else if (method=="CANCEL") { route(1); break; } else if (method=="INVITE") { route(3); break; } else if (method=="REGISTER") { route(2); break; }; lookup("aliases"); if (uri!=myself) { route(4); route(1); break; }; if (!lookup("location")) { sl_send_reply("404", "User Not Found"); break; }; route(1); } route[1] { t_on_reply("1"); # send it out now; use stateful forwarding as it works reliably # even for UDP2TCP 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 (!www_authorize("","subscriber")) { www_challenge("","0"); break; }; if (!check_to()) { sl_send_reply("401", "Unauthorized"); break; }; consume_credentials(); if (!save("location")) { sl_reply_error(); }; } route[3] { #---------- #--INVITE Message Handler #----------- if (!proxy_authorize("","subscriber")) { proxy_challenge("","0"); break; } else if (!check_from()) { sl_send_reply("403", "Use From=ID"); break; }; consume_credentials(); if (nat_uac_test("19")) { setflag(6); } lookup("aliases"); if (uri!=myself) { route(4); route(1); break; }; if (!lookup("location")) { sl_send_reply("404", "User Not Found"); break; }; route(4); route(1); } route[4] { #NAT Traversal if (isflagset(6)) { force_rport(); fix_nated_contact(); force_rtp_proxy(); } } onreply_route[1] { if (isflagset(6) && status=~"(180)|(183)|2[0-9][0-9]") { if (!search("^Contact-Length:[ ]*0")) { force_rtp_proxy(); }; }; if (nat_uac_test("1")) { fix_nated_contact(); }; }