[Users] contact field port problem when behind nats
Daniel-Constantin Mierla
daniel at voice-system.ro
Sat Jan 7 12:59:45 CET 2006
You cannot achieve NAT traversal if the UAC does not do symmetric
signaling (to send and receive SIP messages on the same port). The
server cannot open the pinhole in the NAT from outside on the port
advertised in the contact header, only the UAC can do it.
Cheers,
Daniel
On 01/06/06 21:14, Jack Wei wrote:
> Hi,
>
> I'm having a problem when an UAC is behind NAT and has a public port other than
> 5060. The public port isn't present in the contact field so when an ACK for an
> INVITE is sent to the UAC, it's directed to the default port of 5060. I'm
> currently using v1.0.0 w/ the NATHELPER module. The UAC is SJphone. Any help
> would be greatly appreciated.
>
>
>
>
>
> NAT part of my openser.cfg :
>
> if (nat_uac_test("19"))
> {
> if ( method == "REGISTER" )
> {
> fix_nated_register();
> force_rport();
> }
> else
> {
> force_rport();
> fix_nated_contact();
>
> if (method == "INVITE")
> {
> fix_nated_sdp("1");
> };
> };
>
> append_hf( "P-hint: NAT traversal\r\n" );
> }
>
>
>
>
> the sip proxy is voip.somewhere.com and 1.1.1.1
> the pstn gateway is 2.2.2.2
>
> the caller is from pstn and the callee is the uac.
>
>
> Here's a log of SIP msgs:
>
> #
> U 2.2.2.2:5060 -> 1.1.1.1:5060
> INVITE sip:2139435286 at voip.somewhere.com:5060;user=phone SIP/2.0.
> t: <sip:2139435286 at voip.somewhere.com:5060;user=phone>.
> f: <sip:2139961998 at 2.2.2.2:5060;user=phone>;tag=20712b63-1e20393a-83ef4d40.
> Remote-Party-Id:
> <sip:2139961998 at 2.2.2.2:5060;user=phone>;screen=no;id-type=subscriber;party=calling;privacy=off.
> i: dfc2b0e2-380-1e20393a at 2.2.2.2.
> CSeq: 7528304 INVITE.
> v: SIP/2.0/UDP 2.2.2.2:5060.
> Max-Forwards: 70.
> m: <sip:2139961998 at 2.2.2.2:5060;user=phone>.
> k: replaces.
> c: application/sdp.
> Accept: application/sdp.
> Accept-Encoding: .
> Accept-Language: en.
> User-Agent: Lucent-Universal-Gateway.
> l: 244.
> .
> v=0.
> o=VTX-SIP-TNT01 505428282 505428282 IN IP4 2.2.2.2.
> s=Session SDP.
> c=IN IP4 2.2.2.2.
> t=0 0.
> m=audio 41788 RTP/AVP 0 101.
> a=silenceSupp:off.
> a=ecan:b on g168.
> a=ptime:20.
> a=rtpmap:101 telephone-event/8000.
> a=rtpmap:0 PCMU/8000.
>
> #
> U 1.1.1.1:5060 -> 2.2.2.2:5060
> SIP/2.0 100 trying -- your call is important to us.
> t: <sip:2139435286 at voip.somewhere.com:5060;user=phone>.
> f: <sip:2139961998 at 2.2.2.2:5060;user=phone>;tag=20712b63-1e20393a-83ef4d40.
> i: dfc2b0e2-380-1e20393a at 2.2.2.2.
> CSeq: 7528304 INVITE.
> v: SIP/2.0/UDP 2.2.2.2:5060.
> Server: OpenSer (1.0.0-tls (i386/linux)).
> Content-Length: 0.
> .
>
> #
> U 1.1.1.1:5060 -> 64.77.236.227:32883
> INVITE sip:2139435286 at 64.77.236.227 SIP/2.0.
> Record-Route:
> <sip:2139435286 at voip.somewhere.com;ftag=20712b63-1e20393a-83ef4d40;lr=on>.
> t: <sip:2139435286 at voip.somewhere.com:5060;user=phone>.
> f: <sip:2139961998 at 2.2.2.2:5060;user=phone>;tag=20712b63-1e20393a-83ef4d40.
> Remote-Party-Id:
> <sip:2139961998 at 2.2.2.2:5060;user=phone>;screen=no;id-type=subscriber;party=calling;privacy=off.
> i: dfc2b0e2-380-1e20393a at 2.2.2.2.
> CSeq: 7528304 INVITE.
> Via: SIP/2.0/UDP voip.somewhere.com;branch=z9hG4bK8325.35c96c63.0.
> v: SIP/2.0/UDP 2.2.2.2:5060.
> Max-Forwards: 69.
> m: <sip:2139961998 at 2.2.2.2:5060;user=phone>.
> k: replaces.
> c: application/sdp.
> Accept: application/sdp.
> Accept-Encoding: .
> Accept-Language: en.
> User-Agent: Lucent-Universal-Gateway.
> l: 244.
> P-hint: VOIP OUTBOUND.
> .
> v=0.
> o=VTX-SIP-TNT01 505428282 505428282 IN IP4 2.2.2.2.
> s=Session SDP.
> c=IN IP4 2.2.2.2.
> t=0 0.
> m=audio 41788 RTP/AVP 0 101.
> a=silenceSupp:off.
> a=ecan:b on g168.
> a=ptime:20.
> a=rtpmap:101 telephone-event/8000.
> a=rtpmap:0 PCMU/8000.
>
> #
> U 64.77.236.227:32883 -> 1.1.1.1:5060
> SIP/2.0 100 Trying.
> v: SIP/2.0/UDP
> voip.somewhere.com;received=1.1.1.1;branch=z9hG4bK8325.35c96c63.0,SIP/2.0/UDP
> 2.2.2.2:5060.
> f: <sip:2139961998 at 2.2.2.2:5060;user=phone>;tag=20712b63-1e20393a-83ef4d40.
> t: ""<sip:2139435286 at voip.somewhere.com:5060;user=phone>;tag=71451719939.
> i: dfc2b0e2-380-1e20393a at 2.2.2.2.
> CSeq: 7528304 INVITE.
> l: 0.
> Server: SJphone/1.61.306c (SJ Labs).
> .
>
> #
> U 64.77.236.227:32883 -> 1.1.1.1:5060
> SIP/2.0 200 OK.
> v: SIP/2.0/UDP
> voip.somewhere.com;received=1.1.1.1;branch=z9hG4bK8325.35c96c63.0,SIP/2.0/UDP
> 2.2.2.2:5060.
> f: <sip:2139961998 at 2.2.2.2:5060;user=phone>;tag=20712b63-1e20393a-83ef4d40.
> t: "Jack
> Wei"<sip:2139435286 at voip.somewhere.com:5060;user=phone>;tag=71451719939.
> m: <sip:2139435286 at 64.77.236.227>.
> i: dfc2b0e2-380-1e20393a at 2.2.2.2.
> CSeq: 7528304 INVITE.
> l: 217.
> c: application/sdp.
> Server: SJphone/1.61.306c (SJ Labs).
> Record-Route:
> <sip:2139435286 at voip.somewhere.com;ftag=20712b63-1e20393a-83ef4d40;lr=on>.
> .
> v=0.
> o=- 3345559486 3345559486 IN IP4 64.77.236.227.
> s=SJphone.
> c=IN IP4 64.77.236.227.
> t=0 0.
> a=setup:active.
> m=audio 49154 RTP/AVP 0 101.
> a=rtpmap:0 PCMU/8000.
> a=rtpmap:101 telephone-event/8000.
> a=fmtp:101 0-11,16.
>
> #
> U 1.1.1.1:5060 -> 2.2.2.2:5060
> SIP/2.0 200 OK.
> v: SIP/2.0/UDP 2.2.2.2:5060.
> f: <sip:2139961998 at 2.2.2.2:5060;user=phone>;tag=20712b63-1e20393a-83ef4d40.
> t: "Jack
> Wei"<sip:2139435286 at voip.somewhere.com:5060;user=phone>;tag=71451719939.
> m: <sip:2139435286 at 64.77.236.227>.
> i: dfc2b0e2-380-1e20393a at 2.2.2.2.
> CSeq: 7528304 INVITE.
> l: 217.
> c: application/sdp.
> Server: SJphone/1.61.306c (SJ Labs).
> Record-Route:
> <sip:2139435286 at voip.somewhere.com;ftag=20712b63-1e20393a-83ef4d40;lr=on>.
> .
> v=0.
> o=- 3345559486 3345559486 IN IP4 64.77.236.227.
> s=SJphone.
> c=IN IP4 64.77.236.227.
> t=0 0.
> a=setup:active.
> m=audio 49154 RTP/AVP 0 101.
> a=rtpmap:0 PCMU/8000.
> a=rtpmap:101 telephone-event/8000.
> a=fmtp:101 0-11,16.
>
> #
> U 2.2.2.2:5060 -> 1.1.1.1:5060
> ACK sip:2139435286 at voip.somewhere.com;ftag=20712b63-1e20393a-83ef4d40;lr=on
> SIP/2.0.
> t: <sip:2139435286 at voip.somewhere.com:5060;user=phone>;tag=71451719939.
> f: <sip:2139961998 at 2.2.2.2:5060;user=phone>;tag=20712b63-1e20393a-83ef4d40.
> i: dfc2b0e2-380-1e20393a at 2.2.2.2.
> CSeq: 7528304 ACK.
> v: SIP/2.0/UDP 2.2.2.2:5060.
> Max-Forwards: 70.
> Route: <sip:2139435286 at 64.77.236.227>.
> User-Agent: Lucent-Universal-Gateway.
> l: 0.
> .
>
> #
> U 1.1.1.1:5060 -> 64.77.236.227:5060
> ACK sip:2139435286 at 64.77.236.227 SIP/2.0.
> Record-Route:
> <sip:2139435286 at voip.somewhere.com;ftag=20712b63-1e20393a-83ef4d40;lr=on>.
> t: <sip:2139435286 at voip.somewhere.com:5060;user=phone>;tag=71451719939.
> f: <sip:2139961998 at 2.2.2.2:5060;user=phone>;tag=20712b63-1e20393a-83ef4d40.
> i: dfc2b0e2-380-1e20393a at 2.2.2.2.
> CSeq: 7528304 ACK.
> Via: SIP/2.0/UDP voip.somewhere.com;branch=0.
> v: SIP/2.0/UDP 2.2.2.2:5060.
> Max-Forwards: 69.
> User-Agent: Lucent-Universal-Gateway.
> l: 0.
> P-hint: rr-enforced.
> .
>
> #
> U 64.77.236.227:32883 -> 1.1.1.1:5060
> SIP/2.0 200 OK.
> v: SIP/2.0/UDP
> voip.somewhere.com;received=1.1.1.1;branch=z9hG4bK8325.35c96c63.0,SIP/2.0/UDP
> 2.2.2.2:5060.
> f: <sip:2139961998 at 2.2.2.2:5060;user=phone>;tag=20712b63-1e20393a-83ef4d40.
> t: "Jack
> Wei"<sip:2139435286 at voip.somewhere.com:5060;user=phone>;tag=71451719939.
> m: <sip:2139435286 at 64.77.236.227>.
> i: dfc2b0e2-380-1e20393a at 2.2.2.2.
> CSeq: 7528304 INVITE.
> l: 217.
> c: application/sdp.
> Server: SJphone/1.61.306c (SJ Labs).
> Record-Route:
> <sip:2139435286 at voip.somewhere.com;ftag=20712b63-1e20393a-83ef4d40;lr=on>.
> .
> v=0.
> o=- 3345559486 3345559486 IN IP4 64.77.236.227.
> s=SJphone.
> c=IN IP4 64.77.236.227.
> t=0 0.
> a=setup:active.
> m=audio 49154 RTP/AVP 0 101.
> a=rtpmap:0 PCMU/8000.
> a=rtpmap:101 telephone-event/8000.
> a=fmtp:101 0-11,16.
>
> #
> U 1.1.1.1:5060 -> 2.2.2.2:5060
> SIP/2.0 200 OK.
> v: SIP/2.0/UDP 2.2.2.2:5060.
> f: <sip:2139961998 at 2.2.2.2:5060;user=phone>;tag=20712b63-1e20393a-83ef4d40.
> t: "Jack
> Wei"<sip:2139435286 at voip.somewhere.com:5060;user=phone>;tag=71451719939.
> m: <sip:2139435286 at 64.77.236.227>.
> i: dfc2b0e2-380-1e20393a at 2.2.2.2.
> CSeq: 7528304 INVITE.
> l: 217.
> c: application/sdp.
> Server: SJphone/1.61.306c (SJ Labs).
> Record-Route:
> <sip:2139435286 at voip.somewhere.com;ftag=20712b63-1e20393a-83ef4d40;lr=on>.
> .
> v=0.
> o=- 3345559486 3345559486 IN IP4 64.77.236.227.
> s=SJphone.
> c=IN IP4 64.77.236.227.
> t=0 0.
> a=setup:active.
> m=audio 49154 RTP/AVP 0 101.
> a=rtpmap:0 PCMU/8000.
> a=rtpmap:101 telephone-event/8000.
> a=fmtp:101 0-11,16.
>
> #
> U 2.2.2.2:5060 -> 1.1.1.1:5060
> ACK sip:2139435286 at voip.somewhere.com;ftag=20712b63-1e20393a-83ef4d40;lr=on
> SIP/2.0.
> t: <sip:2139435286 at voip.somewhere.com:5060;user=phone>;tag=71451719939.
> f: <sip:2139961998 at 2.2.2.2:5060;user=phone>;tag=20712b63-1e20393a-83ef4d40.
> i: dfc2b0e2-380-1e20393a at 2.2.2.2.
> CSeq: 7528304 ACK.
> v: SIP/2.0/UDP 2.2.2.2:5060.
> Max-Forwards: 70.
> Route: <sip:2139435286 at 64.77.236.227>.
> User-Agent: Lucent-Universal-Gateway.
> l: 0.
> .
>
> #
> U 1.1.1.1:5060 -> 64.77.236.227:5060
> ACK sip:2139435286 at 64.77.236.227 SIP/2.0.
> Record-Route:
> <sip:2139435286 at voip.somewhere.com;ftag=20712b63-1e20393a-83ef4d40;lr=on>.
> t: <sip:2139435286 at voip.somewhere.com:5060;user=phone>;tag=71451719939.
> f: <sip:2139961998 at 2.2.2.2:5060;user=phone>;tag=20712b63-1e20393a-83ef4d40.
> i: dfc2b0e2-380-1e20393a at 2.2.2.2.
> CSeq: 7528304 ACK.
> Via: SIP/2.0/UDP voip.somewhere.com;branch=0.
> v: SIP/2.0/UDP 2.2.2.2:5060.
> Max-Forwards: 69.
> User-Agent: Lucent-Universal-Gateway.
> l: 0.
> P-hint: rr-enforced.
> .
>
>
>
>
>
>
> ................<REPEAT OKs and ACKs>........................
>
>
>
>
>
>
>
>
> #
> U 64.77.236.227:32883 -> 1.1.1.1:5060
> BYE sip:2139961998 at 2.2.2.2:5060;user=phone SIP/2.0.
> v: SIP/2.0/UDP
> 192.168.0.100;rport;branch=z9hG4bKc0a800640000002243beb15e0000571700000028.
> f: "Jack
> Wei"<sip:2139435286 at voip.somewhere.com:5060;user=phone>;tag=71451719939.
> t: <sip:2139961998 at 2.2.2.2:5060;user=phone>;tag=20712b63-1e20393a-83ef4d40.
> i: dfc2b0e2-380-1e20393a at 2.2.2.2.
> CSeq: 1 BYE.
> Max-Forwards: 70.
> User-Agent: SJphone/1.61.306c (SJ Labs).
> l: 0.
> Route:
> <sip:2139435286 at voip.somewhere.com;ftag=20712b63-1e20393a-83ef4d40;lr=on>.
> .
>
> #
> U 1.1.1.1:5060 -> 2.2.2.2:5060
> BYE sip:2139961998 at 2.2.2.2:5060;user=phone SIP/2.0.
> Record-Route: <sip:2139961998 at voip.somewhere.com;ftag=71451719939;lr=on>.
> Via: SIP/2.0/UDP voip.somewhere.com;branch=z9hG4bK4f59.28705173.0.
> v: SIP/2.0/UDP
> 192.168.0.100;received=64.77.236.227;rport=32883;branch=z9hG4bKc0a800640000002243beb15e0000571700000028.
> f: "Jack
> Wei"<sip:2139435286 at voip.somewhere.com:5060;user=phone>;tag=71451719939.
> t: <sip:2139961998 at 2.2.2.2:5060;user=phone>;tag=20712b63-1e20393a-83ef4d40.
> i: dfc2b0e2-380-1e20393a at 2.2.2.2.
> CSeq: 1 BYE.
> Max-Forwards: 69.
> User-Agent: SJphone/1.61.306c (SJ Labs).
> l: 0.
> P-hint: NAT traversal.
> P-hint: rr-enforced.
> .
>
> #
> U 2.2.2.2:5060 -> 1.1.1.1:5060
> SIP/2.0 200 OK.
> v: SIP/2.0/UDP voip.somewhere.com;branch=z9hG4bK4f59.28705173.0.
> v: SIP/2.0/UDP
> 192.168.0.100;received=64.77.236.227;rport=32883;branch=z9hG4bKc0a800640000002243beb15e0000571700000028.
> t: <sip:2139961998 at 2.2.2.2:5060;user=phone>;tag=20712b63-1e20393a-83ef4d40.
> f: "Jack Wei"
> <sip:2139435286 at voip.somewhere.com:5060;user=phone>;tag=71451719939.
> i: dfc2b0e2-380-1e20393a at 2.2.2.2.
> CSeq: 1 BYE.
> Server: Lucent-Universal-Gateway.
> User-Agent: Lucent-Universal-Gateway.
> l: 0.
> .
>
> #
> U 1.1.1.1:5060 -> 64.77.236.227:32883
> SIP/2.0 200 OK.
> v: SIP/2.0/UDP
> 192.168.0.100;received=64.77.236.227;rport=32883;branch=z9hG4bKc0a800640000002243beb15e0000571700000028.
> t: <sip:2139961998 at 2.2.2.2:5060;user=phone>;tag=20712b63-1e20393a-83ef4d40.
> f: "Jack Wei"
> <sip:2139435286 at voip.somewhere.com:5060;user=phone>;tag=71451719939.
> i: dfc2b0e2-380-1e20393a at 2.2.2.2.
> CSeq: 1 BYE.
> Server: Lucent-Universal-Gateway.
> User-Agent: Lucent-Universal-Gateway.
> l: 0.
> .
>
>
> Jack Wei
>
>
>
> __________________________________________
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