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But the private IP was already replaced with following by the NAT/FW:<BR>
<BR>
c=IN IP4 113.108.Z.1<BR>t=0 0<BR>m=audio 14794 RTP/AVP 18 101<BR>a=fmtp:18 annexb=yes<BR><BR>
Even if not, the Kamailio also will fix it by the fix_nated_sdp. Most likely, there's a firewall which does the NAT and is aware of the SIP call as it replaces the 172.16.114.1 in both the SDP and the via header, and could be something wrong btw the kamailio and the firewall.<BR>
<BR>
Please suggest if any special config required on Kamailio.<BR>
<BR>
Thanks,<BR>
Kevin<BR>
<BR>
<HR id=stopSpelling>
Date: Sun, 20 Jun 2010 08:24:19 -0400<BR>From: kamailio.org@spam.lublink.net<BR>To: sr-users@lists.sip-router.org<BR>Subject: Re: [SR-Users] No voice issue with NAT<BR><BR><BR>The eyebeam has referenced a private address in the SDP ( 172.16.114.1 ), it is my understanding that since this IP is not routable, you'll never get any audio. I believe the purpose of RTPProxy is to bridge calls that are behind private IPs. <BR><BR>I believe you'll need an RTP Proxy or Media Proxy to fully support crossing NATs. <BR><BR>David<BR><BR><BR>On 10-06-20 06:50 AM, JinKevin wrote:
<BLOCKQUOTE cite=mid:SNT110-W332AD4CC665BF10EE366E4E6C20@phx.gbl>
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Hi,<BR> <BR>My kamailio and application server are with Public IPs so the system uses nathelper without RTPProxy. It works with the eyebeam behind the ADSL router, but I cannot hear any voice ( ethereal capture on the PC shows no RTP from the application server) when try it in a Hotel or with a 3G data card. Below is the SIP messages for the issue, is there anyway can fix the issuse? <BR>============Start===========================<BR>UAC ----> NAT/Firewall(FW)<BR> <BR>INVITE <A class=ecxmoz-txt-link-freetext>sip:0216666@210.x.y.15</A> SIP/2.0<BR>Via: SIP/2.0/UDP 172.16.114.1:51828;branch=z9hG4bK-d8754z-3870be05b936bf38-1---d8754z-;rport<BR>Max-Forwards: 70<BR>Contact: <A class=ecxmoz-txt-link-rfc2396E><sip:2001@172.16.114.1:12461></A><BR>To: "videoConf"<A class=ecxmoz-txt-link-rfc2396E><sip:0216666@210.x.y.15></A><BR>From: "2001"<A class=ecxmoz-txt-link-rfc2396E><sip:2001@210.x.y.15></A>;tag=db06e72d<BR>Call-ID: NzYwMzhjOTc5NWJlY2Q5YzFiN2JlZGNjNDlkNzMyNmU.<BR> CSeq: 1 INVITE<BR>Allow: INVITE, ACK, CANCEL, OPTIONS, BYE, REFER, NOTIFY, MESSAGE, SUBSCRIBE, INFO<BR>Content-Type: application/sdp<BR>User-Agent: eyeBeam release 1102q stamp 51814<BR>Content-Length: 230<BR>v=0<BR>o=- 7 2 IN IP4 172.16.114.1<BR>s=CounterPath eyeBeam 1.5<BR>c=IN IP4 172.16.114.1<BR>t=0 0<BR>m=audio 27384 RTP/AVP 18 101<BR>a=fmtp:18 annexb=yes<BR>a=fmtp:101 0-15<BR>a=rtpmap:18 G729/8000<BR>a=rtpmap:101 telephone-event/8000<BR>a=sendrecv<BR><BR>NAT/FW ---> Kamailio(KAM)<BR>INVITE <A class=ecxmoz-txt-link-freetext>sip:0216666@210.x.y.15</A> SIP/2.0<BR>Via: SIP/2.0/UDP 113.108.Z.1:13945;branch=z9hG4bK-d8754z-3870be05b936bf38-1---d8754z-;rport<BR>Call-ID: NzYwMzhjOTc5NWJlY2Q5YzFiN2JlZGNjNDlkNzMyNmU.<BR>From: "2001"<A class=ecxmoz-txt-link-rfc2396E><sip:2001@113.108.Z.1:12302></A>;tag=db06e72d<BR>To: "videoConf"<A class=ecxmoz-txt-link-rfc2396E><sip:0216666@210.x.y.15></A><BR>CSeq: 1 INVITE<BR>Max-Forwards: 70<BR>Contact: <A class=ecxmoz-txt-link-rfc2396E><sip:2001@113.108.Z.1:13202></A><BR>Allow: INVITE,ACK,CANCEL,OPTIONS,BYE,REFER,NOTIFY,MESSAGE,SUBSCRIBE,INFO<BR>User-Agent: eyeBeam release 1102q stamp 51814<BR>Content-Length: 230<BR>Content-Type: application/sdp<BR>v=0<BR>o=- 7 2 IN IP4 172.16.114.1<BR>s=CounterPath eyeBeam 1.5<BR>c=IN IP4 113.108.Z.1<BR>t=0 0<BR>m=audio 14794 RTP/AVP 18 101<BR>a=fmtp:18 annexb=yes<BR>a=fmtp:101 0-15<BR>a=rtpmap:18 G729/8000<BR>a=rtpmap:101 telephone-event/8000<BR>a=sendrecv<BR><BR>NAT/FW ---> Kamailio(KAM)<BR>INVITE <A class=ecxmoz-txt-link-freetext>sip:0216666@210.x.y.15</A> SIP/2.0<BR>Via: SIP/2.0/UDP 113.108.Z.1:13945;branch=z9hG4bK-d8754z-3870be05b936bf38-1---d8754z-;rport<BR>Call-ID: NzYwMzhjOTc5NWJlY2Q5YzFiN2JlZGNjNDlkNzMyNmU.<BR>From: "2001"<A class=ecxmoz-txt-link-rfc2396E><sip:2001@113.108.Z.1:12302></A>;tag=db06e72d<BR>To: "videoConf"<A class=ecxmoz-txt-link-rfc2396E><sip:0216666@210.x.y.15></A><BR>CSeq: 1 INVITE<BR>Max-Forwards: 70<BR>Contact: <A class=ecxmoz-txt-link-rfc2396E><sip:2001@113.108.Z.1:13202></A><BR>Allow: INVITE,ACK,CANCEL,OPTIONS,BYE,REFER,NOTIFY,MESSAGE,SUBSCRIBE,INFO<BR>User-Agent: eyeBeam release 1102q stamp 51814<BR>Content-Length: 230<BR>Content-Type: application/sdp<BR>v=0<BR>o=- 7 2 IN IP4 172.16.114.1<BR>s=CounterPath eyeBeam 1.5<BR>c=IN IP4 113.108.Z.1<BR>t=0 0<BR>m=audio 14794 RTP/AVP 18 101<BR>a=fmtp:18 annexb=yes<BR>a=fmtp:101 0-15<BR>a=rtpmap:18 G729/8000<BR>a=rtpmap:101 telephone-event/8000<BR>a=sendrecv<BR><BR>SIP/2.0 100 trying -- your call is important to us<BR>Via: SIP/2.0/UDP 172.16.114.1:51828;branch=z9hG4bK-d8754z-3870be05b936bf38-1---d8754z-;rport=12461<BR>Call-ID: NzYwMzhjOTc5NWJlY2Q5YzFiN2JlZGNjNDlkNzMyNmU.<BR>From: "2001"<A class=ecxmoz-txt-link-rfc2396E><sip:2001@210.x.y.15:5060></A>;tag=db06e72d<BR>To: "videoConf"<A class=ecxmoz-txt-link-rfc2396E><sip:0216666@210.x.y.15></A><BR>CSeq: 1 INVITE<BR>Server: kamailio (3.0.2 (sparc64/solaris))<BR>Content-Length: 0<BR>KAM ---> AS<BR>INVITE <A class=ecxmoz-txt-link-freetext>sip:0216666@210.x.y.3:5060</A> SIP/2.0<BR>Record-Route: <A class=ecxmoz-txt-link-rfc2396E><sip:210.x.y.15;lr=on;nat=yes></A><BR>Via: SIP/2.0/UDP 210.x.y.15;branch=z9hG4bK316e.08d5.0<BR>Via: SIP/2.0/UDP 113.108.Z.1:13945;branch=z9hG4bK-d8754z-3870be05b936bf38-1---d8754z-;rport=12461<BR>Call-ID: NzYwMzhjOTc5NWJlY2Q5YzFiN2JlZGNjNDlkNzMyNmU.<BR>From: "2001"<A class=ecxmoz-txt-link-rfc2396E><sip:2001@113.108.Z.1:12302></A>;tag=db06e72d<BR>To: "videoConf"<A class=ecxmoz-txt-link-rfc2396E><sip:0216666@210.x.y.15></A><BR>CSeq: 1 INVITE<BR>Max-Forwards: 69<BR>Contact: <A class=ecxmoz-txt-link-rfc2396E><sip:2001@113.108.Z.1:12461></A><BR>Allow: INVITE,ACK,CANCEL,OPTIONS,BYE,REFER,NOTIFY,MESSAGE,SUBSCRIBE,INFO<BR>User-Agent: eyeBeam release 1102q stamp 51814<BR>Content-Length: 257<BR>Content-Type: application/sdp<BR>v=0<BR>o=- 7 2 IN IP4 113.108.Z.1<BR>s=CounterPath eyeBeam 1.5<BR>c=IN IP4 113.108.Z.1<BR>t=0 0<BR>m=audio 14794 RTP/AVP 18 101<BR>a=fmtp:18 annexb=yes<BR>a=fmtp:101 0-15<BR>a=rtpmap:18 G729/8000<BR>a=rtpmap:101 telephone-event/8000<BR>a=sendrecv<BR>a=oldmediaip:172.16.114.1<BR><BR>KAM ---> NAT/FW <BR>SIP/2.0 180 Ringing<BR>Via: SIP/2.0/UDP 172.16.114.1:51828;branch=z9hG4bK-d8754z-3870be05b936bf38-1---d8754z-;rport=12461<BR>Record-Route: <A class=ecxmoz-txt-link-rfc2396E><sip:210.x.y.15;lr;nat=yes></A><BR>Call-ID: NzYwMzhjOTc5NWJlY2Q5YzFiN2JlZGNjNDlkNzMyNmU.<BR>From: "2001"<A class=ecxmoz-txt-link-rfc2396E><sip:2001@210.x.y.15:5060></A>;tag=db06e72d<BR>To: "videoConf"<A class=ecxmoz-txt-link-rfc2396E><sip:0216666@210.x.y.15></A>;tag=a72e08e3-09d3-4cd2-a0d2-d33113440310<BR>CSeq: 1 INVITE<BR>Allow: INVITE,ACK,BYE,CANCEL,PRACK,NOTIFY,INFO,OPTIONS,UPDATE<BR>Supported: 100rel,timer,precondition<BR>Contact: <A class=ecxmoz-txt-link-rfc2396E><sip:0216666@210.x.y.3:5060;transport=udp></A><BR>Content-Length: 0<BR>AS ---> KAM<BR> <BR>SIP/2.0 200 Ok<BR>Via: SIP/2.0/UDP 210.x.y.15;branch=z9hG4bK316e.08d5.0<BR>Via: SIP/2.0/UDP 113.108.Z.1:13945;branch=z9hG4bK-d8754z-3870be05b936bf38-1---d8754z-;rport=12461<BR>Record-Route: <A class=ecxmoz-txt-link-rfc2396E><sip:210.x.y.15;lr=on;nat=yes></A><BR>To: "videoConf" <A class=ecxmoz-txt-link-rfc2396E><sip:0216666@210.x.y.15></A>;tag=a72e08e3-09d3-4cd2-a0d2-d33113440310<BR>From: "2001" <A class=ecxmoz-txt-link-rfc2396E><sip:2001@113.108.Z.1:12302></A>;tag=db06e72d<BR>Call-ID: NzYwMzhjOTc5NWJlY2Q5YzFiN2JlZGNjNDlkNzMyNmU.<BR>CSeq: 1 INVITE<BR>Content-Length: 222<BR>Content-Type: application/sdp<BR>Session-Expires: 1800;refresher=uas<BR>Require: timer<BR>Allow: INVITE,ACK,BYE,CANCEL,PRACK,NOTIFY,INFO,OPTIONS,UPDATE<BR>Supported: 100rel, timer,precondition<BR>Contact: <A class=ecxmoz-txt-link-rfc2396E><sip:0216666@210.x.y.3:5060;transport=udp></A><BR>v=0<BR>o=- 15638 1276800468 IN IP4 210.x.y.8<BR>s=-<BR>c=IN IP4 210.x.y.11<BR>t=0 0<BR>m=audio 30654 RTP/AVP 18 101<BR>a=fmtp:18 annexb=yes<BR>a=fmtp:101 0-15<BR>a=ptime:20<BR>a=rtpmap:18 G729/8000<BR>a=rtpmap:101 telephone-event/8000<BR> <BR>KAM -----> NAT/FW<BR>SIP/2.0 200 Ok<BR>Via: SIP/2.0/UDP 113.108.Z.1:13945;branch=z9hG4bK-d8754z-3870be05b936bf38-1---d8754z-;rport=12461<BR>Record-Route: <A class=ecxmoz-txt-link-rfc2396E><sip:210.x.y.15;lr=on;nat=yes></A><BR>To: "videoConf" <A class=ecxmoz-txt-link-rfc2396E><sip:0216666@210.x.y.15></A>;tag=a72e08e3-09d3-4cd2-a0d2-d33113440310<BR>From: "2001" <A class=ecxmoz-txt-link-rfc2396E><sip:2001@113.108.Z.1:12302></A>;tag=db06e72d<BR>Call-ID: NzYwMzhjOTc5NWJlY2Q5YzFiN2JlZGNjNDlkNzMyNmU.<BR>CSeq: 1 INVITE<BR>Content-Length: 222<BR>Content-Type: application/sdp<BR>Session-Expires: 1800;refresher=uas<BR>Require: timer<BR>Allow: INVITE,ACK,BYE,CANCEL,PRACK,NOTIFY,INFO,OPTIONS,UPDATE<BR>Supported: 100rel, timer,precondition<BR>Contact: <A class=ecxmoz-txt-link-rfc2396E><sip:0216666@210.x.y.3:5060;transport=udp></A><BR>v=0<BR>o=- 15638 1276800468 IN IP4 210.x.y.8<BR>s=-<BR>c=IN IP4 210.x.y.11<BR>t=0 0<BR>m=audio 30654 RTP/AVP 18 101<BR>a=fmtp:18 annexb=yes<BR>a=fmtp:101 0-15<BR>a=ptime:20<BR>a=rtpmap:18 G729/8000<BR>a=rtpmap:101 telephone-event/8000<BR> <BR>NAT/FW ----> UAC<BR>SIP/2.0 200 Ok<BR>Via: SIP/2.0/UDP 172.16.114.1:51828;branch=z9hG4bK-d8754z-3870be05b936bf38-1---d8754z-;rport=12461<BR>Record-Route: <A class=ecxmoz-txt-link-rfc2396E><sip:210.x.y.15;lr;nat=yes></A><BR>Call-ID: NzYwMzhjOTc5NWJlY2Q5YzFiN2JlZGNjNDlkNzMyNmU.<BR>From: "2001"<A class=ecxmoz-txt-link-rfc2396E><sip:2001@210.x.y.15:5060></A>;tag=db06e72d<BR>To: "videoConf"<A class=ecxmoz-txt-link-rfc2396E><sip:0216666@210.x.y.15></A>;tag=a72e08e3-09d3-4cd2-a0d2-d33113440310<BR>CSeq: 1 INVITE<BR>Session-Expires: 1800;refresher=uas<BR>Require: timer<BR>Allow: INVITE,ACK,BYE,CANCEL,PRACK,NOTIFY,INFO,OPTIONS,UPDATE<BR>Supported: 100rel,timer,precondition<BR>Contact: <A class=ecxmoz-txt-link-rfc2396E><sip:0216666@210.x.y.3:5060;transport=udp></A><BR>Content-Length: 222<BR>Content-Type: application/sdp<BR>v=0<BR>o=- 15638 1276800468 IN IP4 210.x.y.8<BR>s=-<BR>c=IN IP4 210.x.y.11<BR>t=0 0<BR>m=audio 30654 RTP/AVP 18 101<BR>a=fmtp:18 annexb=yes<BR>a=fmtp:101 0-15<BR>a=ptime:20<BR>a=rtpmap:18 G729/8000<BR>a=rtpmap:101 telephone-event/8000<BR><BR>UAC ---> NAT/FW<BR>ACK <A class=ecxmoz-txt-link-freetext>sip:0216666@210.x.y.3:5060;transport=udp</A> SIP/2.0<BR>Via: SIP/2.0/UDP 172.16.114.1:51828;branch=z9hG4bK-d8754z-ff50226f4e20b91c-1---d8754z-;rport<BR>Max-Forwards: 70<BR>Route: <A class=ecxmoz-txt-link-rfc2396E><sip:210.x.y.15;lr;nat=yes></A><BR>Contact: <A class=ecxmoz-txt-link-rfc2396E><sip:2001@172.16.114.1:12461></A><BR>To: "videoConf"<A class=ecxmoz-txt-link-rfc2396E><sip:0216666@210.x.y.15></A>;tag=a72e08e3-09d3-4cd2-a0d2-d33113440310<BR>From: "2001"<A class=ecxmoz-txt-link-rfc2396E><sip:2001@210.x.y.15:5060></A>;tag=db06e72d<BR>Call-ID: NzYwMzhjOTc5NWJlY2Q5YzFiN2JlZGNjNDlkNzMyNmU.<BR>CSeq: 1 ACK<BR>User-Agent: eyeBeam release 1102q stamp 51814<BR>Content-Length: 0<BR> <BR>NAT/FW ----> KAM <BR> <BR>ACK <A class=ecxmoz-txt-link-freetext>sip:0216666@210.x.y.3:5060;transport=udp</A> SIP/2.0<BR>Via: SIP/2.0/UDP 113.108.Z.1:13945;branch=z9hG4bK-d8754z-ff50226f4e20b91c-1---d8754z-;rport<BR>Route: <A class=ecxmoz-txt-link-rfc2396E><sip:210.x.y.15;lr;nat=yes></A><BR>Call-ID: NzYwMzhjOTc5NWJlY2Q5YzFiN2JlZGNjNDlkNzMyNmU.<BR>From: "2001"<A class=ecxmoz-txt-link-rfc2396E><sip:2001@113.108.Z.1:12302></A>;tag=db06e72d<BR>To: "videoConf"<A class=ecxmoz-txt-link-rfc2396E><sip:0216666@210.x.y.15></A>;tag=a72e08e3-09d3-4cd2-a0d2-d33113440310<BR>CSeq: 1 ACK<BR>Max-Forwards: 70<BR>Contact: <A class=ecxmoz-txt-link-rfc2396E><sip:2001@113.108.Z.1:13202></A><BR>User-Agent: eyeBeam release 1102q stamp 51814<BR>Content-Length: 0<BR> <BR>KAM ----> AS <BR> <BR>ACK <A class=ecxmoz-txt-link-freetext>sip:0216666@210.x.y.3:5060;transport=udp</A> SIP/2.0<BR>Via: SIP/2.0/UDP 210.x.y.15;branch=0<BR>Via: SIP/2.0/UDP 113.108.Z.1:13945;branch=z9hG4bK-d8754z-ff50226f4e20b91c-1---d8754z-;rport=12461<BR>Call-ID: NzYwMzhjOTc5NWJlY2Q5YzFiN2JlZGNjNDlkNzMyNmU.<BR>From: "2001"<A class=ecxmoz-txt-link-rfc2396E><sip:2001@113.108.Z.1:12302></A>;tag=db06e72d<BR>To: "videoConf"<A class=ecxmoz-txt-link-rfc2396E><sip:0216666@210.x.y.15></A>;tag=a72e08e3-09d3-4cd2-a0d2-d33113440310<BR>CSeq: 1 ACK<BR>Max-Forwards: 69<BR>Contact: <A class=ecxmoz-txt-link-rfc2396E><sip:2001@113.108.Z.1:12461></A><BR>User-Agent: eyeBeam release 1102q stamp 51814<BR>Content-Length: 0<BR>==============End================<BR> <BR> <BR>Thanks,<BR>Kevin<BR><BR><BR>
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