Re: [SR-Users] No voice issue with NAT

But the private IP was already replaced with following by the NAT/FW: c=IN IP4 113.108.Z.1 t=0 0 m=audio 14794 RTP/AVP 18 101 a=fmtp:18 annexb=yes 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. Please suggest if any special config required on Kamailio. Thanks, Kevin Date: Sun, 20 Jun 2010 08:24:19 -0400 From: kamailio.org(a)spam.lublink.net To: sr-users(a)lists.sip-router.org Subject: Re: [SR-Users] No voice issue with NAT 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. I believe you'll need an RTP Proxy or Media Proxy to fully support crossing NATs. David On 10-06-20 06:50 AM, JinKevin wrote: Hi, 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? ============Start=========================== UAC ----> NAT/Firewall(FW) INVITE sip:0216666@210.x.y.15 SIP/2.0 Via: SIP/2.0/UDP 172.16.114.1:51828;branch=z9hG4bK-d8754z-3870be05b936bf38-1---d8754z-;rport Max-Forwards: 70 Contact: <sip:2001@172.16.114.1:12461> To: "videoConf"<sip:0216666@210.x.y.15> From: "2001"<sip:2001@210.x.y.15>;tag=db06e72d Call-ID: NzYwMzhjOTc5NWJlY2Q5YzFiN2JlZGNjNDlkNzMyNmU. CSeq: 1 INVITE Allow: INVITE, ACK, CANCEL, OPTIONS, BYE, REFER, NOTIFY, MESSAGE, SUBSCRIBE, INFO Content-Type: application/sdp User-Agent: eyeBeam release 1102q stamp 51814 Content-Length: 230 v=0 o=- 7 2 IN IP4 172.16.114.1 s=CounterPath eyeBeam 1.5 c=IN IP4 172.16.114.1 t=0 0 m=audio 27384 RTP/AVP 18 101 a=fmtp:18 annexb=yes a=fmtp:101 0-15 a=rtpmap:18 G729/8000 a=rtpmap:101 telephone-event/8000 a=sendrecv NAT/FW ---> Kamailio(KAM) INVITE sip:0216666@210.x.y.15 SIP/2.0 Via: SIP/2.0/UDP 113.108.Z.1:13945;branch=z9hG4bK-d8754z-3870be05b936bf38-1---d8754z-;rport Call-ID: NzYwMzhjOTc5NWJlY2Q5YzFiN2JlZGNjNDlkNzMyNmU. From: "2001"<sip:2001@113.108.Z.1:12302>;tag=db06e72d To: "videoConf"<sip:0216666@210.x.y.15> CSeq: 1 INVITE Max-Forwards: 70 Contact: <sip:2001@113.108.Z.1:13202> Allow: INVITE,ACK,CANCEL,OPTIONS,BYE,REFER,NOTIFY,MESSAGE,SUBSCRIBE,INFO User-Agent: eyeBeam release 1102q stamp 51814 Content-Length: 230 Content-Type: application/sdp v=0 o=- 7 2 IN IP4 172.16.114.1 s=CounterPath eyeBeam 1.5 c=IN IP4 113.108.Z.1 t=0 0 m=audio 14794 RTP/AVP 18 101 a=fmtp:18 annexb=yes a=fmtp:101 0-15 a=rtpmap:18 G729/8000 a=rtpmap:101 telephone-event/8000 a=sendrecv NAT/FW ---> Kamailio(KAM) INVITE sip:0216666@210.x.y.15 SIP/2.0 Via: SIP/2.0/UDP 113.108.Z.1:13945;branch=z9hG4bK-d8754z-3870be05b936bf38-1---d8754z-;rport Call-ID: NzYwMzhjOTc5NWJlY2Q5YzFiN2JlZGNjNDlkNzMyNmU. From: "2001"<sip:2001@113.108.Z.1:12302>;tag=db06e72d To: "videoConf"<sip:0216666@210.x.y.15> CSeq: 1 INVITE Max-Forwards: 70 Contact: <sip:2001@113.108.Z.1:13202> Allow: INVITE,ACK,CANCEL,OPTIONS,BYE,REFER,NOTIFY,MESSAGE,SUBSCRIBE,INFO User-Agent: eyeBeam release 1102q stamp 51814 Content-Length: 230 Content-Type: application/sdp v=0 o=- 7 2 IN IP4 172.16.114.1 s=CounterPath eyeBeam 1.5 c=IN IP4 113.108.Z.1 t=0 0 m=audio 14794 RTP/AVP 18 101 a=fmtp:18 annexb=yes a=fmtp:101 0-15 a=rtpmap:18 G729/8000 a=rtpmap:101 telephone-event/8000 a=sendrecv SIP/2.0 100 trying -- your call is important to us Via: SIP/2.0/UDP 172.16.114.1:51828;branch=z9hG4bK-d8754z-3870be05b936bf38-1---d8754z-;rport=12461 Call-ID: NzYwMzhjOTc5NWJlY2Q5YzFiN2JlZGNjNDlkNzMyNmU. From: "2001"<sip:2001@210.x.y.15:5060>;tag=db06e72d To: "videoConf"<sip:0216666@210.x.y.15> CSeq: 1 INVITE Server: kamailio (3.0.2 (sparc64/solaris)) Content-Length: 0 KAM ---> AS INVITE sip:0216666@210.x.y.3:5060 SIP/2.0 Record-Route: <sip:210.x.y.15;lr=on;nat=yes> Via: SIP/2.0/UDP 210.x.y.15;branch=z9hG4bK316e.08d5.0 Via: SIP/2.0/UDP 113.108.Z.1:13945;branch=z9hG4bK-d8754z-3870be05b936bf38-1---d8754z-;rport=12461 Call-ID: NzYwMzhjOTc5NWJlY2Q5YzFiN2JlZGNjNDlkNzMyNmU. From: "2001"<sip:2001@113.108.Z.1:12302>;tag=db06e72d To: "videoConf"<sip:0216666@210.x.y.15> CSeq: 1 INVITE Max-Forwards: 69 Contact: <sip:2001@113.108.Z.1:12461> Allow: INVITE,ACK,CANCEL,OPTIONS,BYE,REFER,NOTIFY,MESSAGE,SUBSCRIBE,INFO User-Agent: eyeBeam release 1102q stamp 51814 Content-Length: 257 Content-Type: application/sdp v=0 o=- 7 2 IN IP4 113.108.Z.1 s=CounterPath eyeBeam 1.5 c=IN IP4 113.108.Z.1 t=0 0 m=audio 14794 RTP/AVP 18 101 a=fmtp:18 annexb=yes a=fmtp:101 0-15 a=rtpmap:18 G729/8000 a=rtpmap:101 telephone-event/8000 a=sendrecv a=oldmediaip:172.16.114.1 KAM ---> NAT/FW SIP/2.0 180 Ringing Via: SIP/2.0/UDP 172.16.114.1:51828;branch=z9hG4bK-d8754z-3870be05b936bf38-1---d8754z-;rport=12461 Record-Route: <sip:210.x.y.15;lr;nat=yes> Call-ID: NzYwMzhjOTc5NWJlY2Q5YzFiN2JlZGNjNDlkNzMyNmU. From: "2001"<sip:2001@210.x.y.15:5060>;tag=db06e72d To: "videoConf"<sip:0216666@210.x.y.15>;tag=a72e08e3-09d3-4cd2-a0d2-d33113440310 CSeq: 1 INVITE Allow: INVITE,ACK,BYE,CANCEL,PRACK,NOTIFY,INFO,OPTIONS,UPDATE Supported: 100rel,timer,precondition Contact: <sip:0216666@210.x.y.3:5060;transport=udp> Content-Length: 0 AS ---> KAM SIP/2.0 200 Ok Via: SIP/2.0/UDP 210.x.y.15;branch=z9hG4bK316e.08d5.0 Via: SIP/2.0/UDP 113.108.Z.1:13945;branch=z9hG4bK-d8754z-3870be05b936bf38-1---d8754z-;rport=12461 Record-Route: <sip:210.x.y.15;lr=on;nat=yes> To: "videoConf" <sip:0216666@210.x.y.15>;tag=a72e08e3-09d3-4cd2-a0d2-d33113440310 From: "2001" <sip:2001@113.108.Z.1:12302>;tag=db06e72d Call-ID: NzYwMzhjOTc5NWJlY2Q5YzFiN2JlZGNjNDlkNzMyNmU. CSeq: 1 INVITE Content-Length: 222 Content-Type: application/sdp Session-Expires: 1800;refresher=uas Require: timer Allow: INVITE,ACK,BYE,CANCEL,PRACK,NOTIFY,INFO,OPTIONS,UPDATE Supported: 100rel, timer,precondition Contact: <sip:0216666@210.x.y.3:5060;transport=udp> v=0 o=- 15638 1276800468 IN IP4 210.x.y.8 s=- c=IN IP4 210.x.y.11 t=0 0 m=audio 30654 RTP/AVP 18 101 a=fmtp:18 annexb=yes a=fmtp:101 0-15 a=ptime:20 a=rtpmap:18 G729/8000 a=rtpmap:101 telephone-event/8000 KAM -----> NAT/FW SIP/2.0 200 Ok Via: SIP/2.0/UDP 113.108.Z.1:13945;branch=z9hG4bK-d8754z-3870be05b936bf38-1---d8754z-;rport=12461 Record-Route: <sip:210.x.y.15;lr=on;nat=yes> To: "videoConf" <sip:0216666@210.x.y.15>;tag=a72e08e3-09d3-4cd2-a0d2-d33113440310 From: "2001" <sip:2001@113.108.Z.1:12302>;tag=db06e72d Call-ID: NzYwMzhjOTc5NWJlY2Q5YzFiN2JlZGNjNDlkNzMyNmU. CSeq: 1 INVITE Content-Length: 222 Content-Type: application/sdp Session-Expires: 1800;refresher=uas Require: timer Allow: INVITE,ACK,BYE,CANCEL,PRACK,NOTIFY,INFO,OPTIONS,UPDATE Supported: 100rel, timer,precondition Contact: <sip:0216666@210.x.y.3:5060;transport=udp> v=0 o=- 15638 1276800468 IN IP4 210.x.y.8 s=- c=IN IP4 210.x.y.11 t=0 0 m=audio 30654 RTP/AVP 18 101 a=fmtp:18 annexb=yes a=fmtp:101 0-15 a=ptime:20 a=rtpmap:18 G729/8000 a=rtpmap:101 telephone-event/8000 NAT/FW ----> UAC SIP/2.0 200 Ok Via: SIP/2.0/UDP 172.16.114.1:51828;branch=z9hG4bK-d8754z-3870be05b936bf38-1---d8754z-;rport=12461 Record-Route: <sip:210.x.y.15;lr;nat=yes> Call-ID: NzYwMzhjOTc5NWJlY2Q5YzFiN2JlZGNjNDlkNzMyNmU. From: "2001"<sip:2001@210.x.y.15:5060>;tag=db06e72d To: "videoConf"<sip:0216666@210.x.y.15>;tag=a72e08e3-09d3-4cd2-a0d2-d33113440310 CSeq: 1 INVITE Session-Expires: 1800;refresher=uas Require: timer Allow: INVITE,ACK,BYE,CANCEL,PRACK,NOTIFY,INFO,OPTIONS,UPDATE Supported: 100rel,timer,precondition Contact: <sip:0216666@210.x.y.3:5060;transport=udp> Content-Length: 222 Content-Type: application/sdp v=0 o=- 15638 1276800468 IN IP4 210.x.y.8 s=- c=IN IP4 210.x.y.11 t=0 0 m=audio 30654 RTP/AVP 18 101 a=fmtp:18 annexb=yes a=fmtp:101 0-15 a=ptime:20 a=rtpmap:18 G729/8000 a=rtpmap:101 telephone-event/8000 UAC ---> NAT/FW ACK sip:0216666@210.x.y.3:5060;transport=udp SIP/2.0 Via: SIP/2.0/UDP 172.16.114.1:51828;branch=z9hG4bK-d8754z-ff50226f4e20b91c-1---d8754z-;rport Max-Forwards: 70 Route: <sip:210.x.y.15;lr;nat=yes> Contact: <sip:2001@172.16.114.1:12461> To: "videoConf"<sip:0216666@210.x.y.15>;tag=a72e08e3-09d3-4cd2-a0d2-d33113440310 From: "2001"<sip:2001@210.x.y.15:5060>;tag=db06e72d Call-ID: NzYwMzhjOTc5NWJlY2Q5YzFiN2JlZGNjNDlkNzMyNmU. CSeq: 1 ACK User-Agent: eyeBeam release 1102q stamp 51814 Content-Length: 0 NAT/FW ----> KAM ACK sip:0216666@210.x.y.3:5060;transport=udp SIP/2.0 Via: SIP/2.0/UDP 113.108.Z.1:13945;branch=z9hG4bK-d8754z-ff50226f4e20b91c-1---d8754z-;rport Route: <sip:210.x.y.15;lr;nat=yes> Call-ID: NzYwMzhjOTc5NWJlY2Q5YzFiN2JlZGNjNDlkNzMyNmU. From: "2001"<sip:2001@113.108.Z.1:12302>;tag=db06e72d To: "videoConf"<sip:0216666@210.x.y.15>;tag=a72e08e3-09d3-4cd2-a0d2-d33113440310 CSeq: 1 ACK Max-Forwards: 70 Contact: <sip:2001@113.108.Z.1:13202> User-Agent: eyeBeam release 1102q stamp 51814 Content-Length: 0 KAM ----> AS ACK sip:0216666@210.x.y.3:5060;transport=udp SIP/2.0 Via: SIP/2.0/UDP 210.x.y.15;branch=0 Via: SIP/2.0/UDP 113.108.Z.1:13945;branch=z9hG4bK-d8754z-ff50226f4e20b91c-1---d8754z-;rport=12461 Call-ID: NzYwMzhjOTc5NWJlY2Q5YzFiN2JlZGNjNDlkNzMyNmU. From: "2001"<sip:2001@113.108.Z.1:12302>;tag=db06e72d To: "videoConf"<sip:0216666@210.x.y.15>;tag=a72e08e3-09d3-4cd2-a0d2-d33113440310 CSeq: 1 ACK Max-Forwards: 69 Contact: <sip:2001@113.108.Z.1:12461> User-Agent: eyeBeam release 1102q stamp 51814 Content-Length: 0 ==============End================ Thanks, Kevin 搜索本应是彩色的,快来体验新一代搜索引擎-必应,精美图片每天换哦! 立即试用！ _______________________________________________ SIP Express Router (SER) and Kamailio (OpenSER) - sr-users mailing list sr-users(a)lists.sip-router.org http://lists.sip-router.org/cgi-bin/mailman/listinfo/sr-users _________________________________________________________________ 想知道明天天气如何？必应告诉你！ http://cn.bing.com/search?q=%E5%A4%A9%E6%B0%94%E9%A2%84%E6%8A%A5&form=M…