Hi Daniel Thank you so much for your feedback.
I came upon the below post, but I'm unable to find the example Norman posted. http://www.mail-archive.com/users@openser.org/msg01932.html In short the end solution is: # If both clients are behind nat we can check to see if they are behind the same # external IP and optimize the media path to go directly between them else if ( isflagset(2) and isflagset(3) ) { log(1, "Both Clients are behind NAT"); # Store the destination domain into an AVP avp_printf("i:450", "$dd"); if ( avp_check("i:450", "eq/$src_ip/g") ) { xlog("L_INFO", "Detected Two Clients Behind the Same NAT - Disabling Mediaproxy"); # Do not use mediaproxy as the clients seem to be behind the same NAT resetflag(2); resetflag(3); } } I haven't tested yet, but would I be right in saying my config should look something like: ####### Routing Logic ######## # Main SIP request routing logic # - processing of any incoming SIP request starts with this route route { # per request initial checks route(REQINIT); # NAT detection route(NAT); # Caller NAT detection route route[NAT] { #!ifdef WITH_NAT force_rport(); if (nat_uac_test("19")) { if (method=="REGISTER") { fix_nated_register(); } else { fix_nated_contact(); } setflag(FLT_NATS); # If both clients are behind nat we can check to see if they are behind the same # external IP and optimize the media path to go directly between them else if ( isflagset(FLT_NATS) and isflagset(FLT_NATB) ) { log(1, "Both Clients are behind NAT"); # Store the destination domain into an AVP avp_printf("i:450", "$dd"); if ( avp_check("i:450", "eq/$src_ip/g") ) { xlog("L_INFO", "Detected Two Clients Behind the Same NAT - Disabling RTPproxy"); # Do not use rtpproxy as the clients seem to be behind the same NAT resetflag(FLT_NATS); resetflag(FLT_NATB); } } } #!endif return; } # RTPProxy control route[RTPPROXY] { #!ifdef WITH_NAT if (is_method("BYE")) { unforce_rtp_proxy(); } else if (is_method("INVITE")){ force_rtp_proxy(); } if (!has_totag()) add_rr_param(";nat=yes"); #!endif return; } Rgds Deon On Dec 20, 2010, at 2:41 PM, Daniel-Constantin Mierla wrote: > Hello, > > On 12/20/10 11:25 AM, Deon Vermeulen wrote: >> Hi List >> >> Can someone please help me? >> >> I need to implement PBX Services for a customer that has 10 IP Phones at his >> Main site and then 20 IP Phones located over 5 Branches. >> >> My goal is to have RTP go end to end and not proxied. >> >> I had a look at the below link and tried it, but with no luck. >> >> http://kamailio.org/dokuwiki/doku.php/examples:caller-callee-behind-same-nat >> >> Here is a partial output of my kamailio.cfg file if someone would be so kind >> to help me. >> >> >> #!ifdef WITH_NAT >> # ----- rtpproxy params ----- >> modparam("rtpproxy", "rtpproxy_sock", "udp:localhost:7722") >> >> # ----- nathelper params ----- >> modparam("nathelper", "natping_interval", 30) >> modparam("nathelper", "ping_nated_only", 1) >> modparam("nathelper", "sipping_bflag", FLB_NATSIPPING) >> modparam("nathelper", "sipping_from", "sip:pin...@x.x.x.x") >> >> # params needed for NAT traversal in other modules >> modparam("nathelper|registrar", "received_avp", "$avp(RECEIVED)") >> modparam("usrloc", "nat_bflag", FLB_NATB) >> #!endif >> >> >> >> ####### Routing Logic ######## >> >> >> # Main SIP request routing logic >> # - processing of any incoming SIP request starts with this route >> route { >> >> # per request initial checks >> route(REQINIT); >> >> # NAT detection >> route(NAT); >> >> >> >> >> # Caller NAT detection route >> route[NAT] { >> #!ifdef WITH_NAT >> force_rport(); >> if (nat_uac_test("19")) { >> if (method=="REGISTER") { >> fix_nated_register(); >> } else { >> fix_nated_contact(); >> } >> setflag(FLT_NATS); >> } >> #!endif >> return; >> } >> >> # RTPProxy control >> route[RTPPROXY] { >> #!ifdef WITH_NAT >> if (is_method("BYE")) { >> unforce_rtp_proxy(); >> } else if (is_method("INVITE")){ >> force_rtp_proxy(); >> } >> if (!has_totag()) add_rr_param(";nat=yes"); >> #!endif >> return; >> } >> >> > what you have to do is to check if the source is natted and $si==$dd, then > callee and caller are behind same nat (if there is one level of nat), so you > don't force rtpproxy usage. > > Cheers, > Daniel > > -- > Daniel-Constantin Mierla > Kamailio (OpenSER) Advanced Training > Jan 24-26, 2011, Irvine, CA, USA > http://www.asipto.com >
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