I have been playnig with SER for a few weeks now on an internal network (all 192.168.X.X) I now want to set up SER to handle NAT so that I can give it a public IP and have my Cisco ATA188's and X-Lite Softphones connect from anywhere. I followed the guide/instructions fron www.onsip.org I ahve SER-0.9 and MediaProxy1.3 up and running. Using the same ser.cfg from onsip.org I thought things were good. I can call from one internal Cisco ATA to another, but there is no sound. During the call if I run sessions.py I see the call although the from and To IP addesses are "XXX.XXX.XXX.XXX" and the status is "Inactive". I assume that is correct as it shouldn't use proxying for an internal to internal call. I am NOT using mediaidspather as both SER and MediaProxy are on the same machine. I want to get internal to internal calling to work before I go back to testing NAT. I am not sure how to debug this further. Any help would be great. Below is my ser.cfg, and mediaproxy.ini SER.cfg # file with Nat'ing setup # #set all Master Level Flags # debug=3 #fork=yes #log_stderror=no /* fork=no log_stderror=yes */ dns=no rev_dns=no fifo="/tmp/ser_fifo" # # Load all Modules # loadmodule "//lib/ser/modules/mysql.so" loadmodule "//lib/ser/modules/sl.so" loadmodule "//lib/ser/modules/tm.so" loadmodule "//lib/ser/modules/rr.so" loadmodule "//lib/ser/modules/maxfwd.so" loadmodule "//lib/ser/modules/usrloc.so" loadmodule "//lib/ser/modules/registrar.so" loadmodule "//lib/ser/modules/auth.so" loadmodule "//lib/ser/modules/auth_db.so" loadmodule "//lib/ser/modules/uri.so" loadmodule "//lib/ser/modules/uri_db.so" #loadmodule "//lib/ser/modules/avpops.so" loadmodule "//lib/ser/modules/textops.so" loadmodule "//lib/ser/modules/domain.so" loadmodule "//lib/ser/modules/mediaproxy.so" loadmodule "//lib/ser/modules/nathelper.so" # #Set Module Parameters # modparam("auth_db", "calculate_ha1", 1) modparam("auth_db", "password_column", "password") modparam("nathelper", "rtpproxy_disable", 1) modparam("nathelper", "natping_interval", 0) modparam("mediaproxy","natping_interval", 30) modparam("mediaproxy","mediaproxy_socket", "/var/run/mediaproxy.sock") modparam("mediaproxy","sip_asymmetrics","/etc/ser/sip-clients") modparam("mediaproxy","rtp_asymmetrics","/etc/ser/rtp-clients") modparam("usrloc", "db_mode", 2) modparam("registrar", "nat_flag", 6) modparam("rr", "enable_full_lr", 1) # # begin Main Route Block # 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; }; # ----------------------------------------------------------------- # Record Route Section # ----------------------------------------------------------------- /*if (method=="INVITE" && client_nat_test("3")) {*/ if (method=="INVITE") { #record_route_preset("192.168.122.135:5060;nat=yes"); # insert IP address #} else if (method!="REGISTER") { record_route(); }; # ----------------------------------------------------------------- # Call Tear Down Section # ----------------------------------------------------------------- if (method=="BYE" || method=="CANCEL") { end_media_session(); }; # ----------------------------------------------------------------- # Loose Route Section # ----------------------------------------------------------------- if (loose_route()) { if (has_totag() && method=="INVITE") { if (client_nat_test("3") || search("^Route:.*;nat=yes")) { setflag(6); # use_media_proxy(); }; }; route(1); break; }; # ----------------------------------------------------------------- # Call Type Processing Section # ----------------------------------------------------------------- if (uri==myself) { if (method=="INVITE") { route(3); break; } else if (method=="REGISTER") { route(2); break; }; if (!lookup("location")) { if (uri=~"^sip:30") { rewritehost("162.168.191.1"); }; if (uri=~"^sip:83") { rewritehost("192.168.194.1"); }; }; route(1); }; } route[1] { # Default Message Handler # ----------------------------------------------------------------- t_on_reply("1"); if (!t_relay()) { if (method=="INVITE" || method=="ACK") { end_media_session(); }; sl_reply_error(); }; } route[2] { # ----------------------------------------------------------------- # REGISTER Message Handler # ---------------------------------------------------------------- sl_send_reply("100", "Trying"); if (!search("^Contact: \*") && client_nat_test("7")) { setflag(6); fix_nated_register(); force_rport(); }; if (!www_authorize("a.b.c ","subscriber")) { www_challenge("a.b.c ","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 (client_nat_test("3")) { setflag(7); force_rport(); fix_nated_contact(); }; if (!lookup("location")) { if (uri=~"^sip:30") { rewritehost("162.168.191.1"); }; if (uri=~"^sip:83") { rewritehost("192.168.194.1"); }; }; if (!proxy_authorize("a.b.c ","subscriber")) { proxy_challenge("a.b.c","0"); break; } else if (!check_from()) { sl_send_reply("403", "Use From=ID"); break; }; consume_credentials(); if (isflagset(6) || isflagset(7)) { use_media_proxy(); }; route(1); } onreply_route[1] { if ((isflagset(6) || isflagset(7)) && (status=~"(180)|(183)|2[0-9][0-9]")) { if (!search("^Content-Length:\ 0")) { use_media_proxy(); }; }; if (client_nat_test("1")) { fix_nated_contact(); }; } Mediaproxy.ini ; ; Configuration file for MediaProxy ; [Dispatcher] ;socket = /var/run/proxydispatcher.sock ;group = ser ;defaultProxy = /var/run/mediaproxy.sock [MediaProxy] ;socket = /var/run/mediaproxy.sock ;group = ser ;listen = None allow = any ;proxyIP = 10.0.0.1 ;portRange = 35000:65000 ;TOS = 0xb8 ;idleTimeout = 60 ;holdTimeout = 3600 ;forceClose = 0 accounting = off [Accounting] user = dbuser password = dbpass host = dbhost database = radius table = radacct