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: [email protected]
To: [email protected]
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:[email protected] 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:[email protected]:12461>
To: "videoConf"<sip:[email protected]>
From: "2001"<sip:[email protected]>;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:[email protected] 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:[email protected]:12302>;tag=db06e72d
To: "videoConf"<sip:[email protected]>
CSeq: 1 INVITE
Max-Forwards: 70
Contact: <sip:[email protected]: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:[email protected] 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:[email protected]:12302>;tag=db06e72d
To: "videoConf"<sip:[email protected]>
CSeq: 1 INVITE
Max-Forwards: 70
Contact: <sip:[email protected]: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:[email protected]:5060>;tag=db06e72d
To: "videoConf"<sip:[email protected]>
CSeq: 1 INVITE
Server: kamailio (3.0.2 (sparc64/solaris))
Content-Length: 0
KAM ---> AS
INVITE sip:[email protected]: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:[email protected]:12302>;tag=db06e72d
To: "videoConf"<sip:[email protected]>
CSeq: 1 INVITE
Max-Forwards: 69
Contact: <sip:[email protected]: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:[email protected]:5060>;tag=db06e72d
To: "videoConf"<sip:[email protected]>;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:[email protected]: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:[email protected]>;tag=a72e08e3-09d3-4cd2-a0d2-d33113440310
From: "2001" <sip:[email protected]: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:[email protected]: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:[email protected]>;tag=a72e08e3-09d3-4cd2-a0d2-d33113440310
From: "2001" <sip:[email protected]: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:[email protected]: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:[email protected]:5060>;tag=db06e72d
To: "videoConf"<sip:[email protected]>;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:[email protected]: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:[email protected]: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:[email protected]:12461>
To: "videoConf"<sip:[email protected]>;tag=a72e08e3-09d3-4cd2-a0d2-d33113440310
From: "2001"<sip:[email protected]:5060>;tag=db06e72d
Call-ID: NzYwMzhjOTc5NWJlY2Q5YzFiN2JlZGNjNDlkNzMyNmU.
CSeq: 1 ACK
User-Agent: eyeBeam release 1102q stamp 51814
Content-Length: 0
NAT/FW ----> KAM
ACK sip:[email protected]: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:[email protected]:12302>;tag=db06e72d
To: "videoConf"<sip:[email protected]>;tag=a72e08e3-09d3-4cd2-a0d2-d33113440310
CSeq: 1 ACK
Max-Forwards: 70
Contact: <sip:[email protected]:13202>
User-Agent: eyeBeam release 1102q stamp 51814
Content-Length: 0
KAM ----> AS
ACK sip:[email protected]: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:[email protected]:12302>;tag=db06e72d
To: "videoConf"<sip:[email protected]>;tag=a72e08e3-09d3-4cd2-a0d2-d33113440310
CSeq: 1 ACK
Max-Forwards: 69
Contact: <sip:[email protected]:12461>
User-Agent: eyeBeam release 1102q stamp 51814
Content-Length: 0
==============End================
Thanks,
Kevin
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