Hi guys,

I'm facing an awkward issue with a Kamailio (1.4.3-notls (i386/linux)) regarding PRACK messages.

I'm migrating an old OpenSER (1.2.2-notls (i386/linux)) to this new Kamailio that is connected to some customer GWs. The GWs we use are Huawei AR2810 and Cisco AS5350.

Both GWs support 100rel and for some signalling they send PRACK messages that are forwarded by OpenSER but consumed by Kamailio. What I was able to troubleshoot shown that Kamailio is not recognizing the lr=on on the header. I tested for PRACK messages within the following segment:

# subsequent messages within a dialog should take the # path determined by record-routing

if (is_method("PRACK")) { xlog("L_ERR", "PRACK: Outside LR...\n"); }; if (loose_route()) { if (is_method("PRACK")) { xlog("L_ERR", "PRACK: Inside LR...\n"); }; # mark routing logic in request append_hf("P-hint: rr-enforced\r\n"); route(1); };

Did anyone have a similar issue with this version of Kamailio?

I captured the signalling for both proxies as follows: KAMAILIO(192.168.200.130) AS5350(192.168.200.40) AR2810(192.168.216.4) # U 192.168.200.40:49395 -> 192.168.200.130:5060 INVITE sip:3516380070@192.168.200.130:5060 SIP/2.0..Via: SIP/2.0/UDP 192.168.200.40:5060;branch=z9hG4bK6107AA91..From: < sip:1143314808@192.168.200.40 sip%3A1143314808@192.168.200.40>; tag=D41203B4-1763..To: <sip:3516380070@192.168.200.130sip%3A3516380070@192.168.200.130>..Date: Wed, 10 Jun 2009 14:26:12 GMT..Call-ID: 7BE3750B-550111DE-86AD96C1-6209D7B9@192.168.200.4 0..Supported: 100rel,timer,replaces..Min-SE: 1800..Cisco-Guid: 2078424251-1426133470-2747138075-1395155982..User-Agent: Cisco-SIPGateway/IOS-12.x..Allo w: INVITE, OPTIONS, BYE, CANCEL, ACK, PRACK, COMET, REFER, SUBSCRIBE, NOTIFY, INFO, UPDATE, REGISTER..CSeq: 101 INVITE..Max-Forwards: 70..Remote-Party-I D: <sip:1143314808@192.168.200.40 sip%3A1143314808@192.168.200.40>;party=calling;screen=yes;privacy=off..Timestamp: 1244643972..Contact: sip:1143314808@192.168.200.40:5060..Expires: 180..Allow-Events: telephone-event..Content-Type: application/sdp..Content-Length: 302....v=0..o=CiscoSystemsSIP-GW-UserAgent 8434 7851 IN IP4 192.168.2 00.40..s=SIP Call..c=IN IP4 192.168.200.40..t=0 0..m=audio 16836 RTP/AVP 18 8 100..c=IN IP4 192.168.200.40..a=rtpmap:18 G729/8000..a=fmtp:18 annexb=no.. a=rtpmap:8 PCMA/8000..a=rtpmap:100 X-NSE/8000..a=fmtp:100 192-194..a=direction:passive.. # U 192.168.200.130:5060 -> 192.168.216.4:5060 INVITE sip:3516380070@192.168.216.4 sip%3A3516380070@192.168.216.4SIP/2.0..Record-Route: sip:192.168.200.130;lr=on;ftag=D41203B4-1763..Via: SIP/2.0/UDP 192.168.200.130;branch=z9hG4 bKf574.3149a801.0..Via: SIP/2.0/UDP 192.168.200.40:5060;branch=z9hG4bK6107AA91..From: <sip:1143314808@192.168.200.40 sip%3A1143314808@192.168.200.40>;tag=D41203B4-1763..To: <sip:35163 80070@192.168.200.130>..Date: Wed, 10 Jun 2009 14:26:12 GMT..Call-ID: 7BE3750B-550111DE-86AD96C1-6209D7B9@192.168.200.40..Supported: 100rel,timer,replac es..Min-SE: 1800..Cisco-Guid: 2078424251-1426133470-2747138075-1395155982..User-Agent: Cisco-SIPGateway/IOS-12.x..Allow: INVITE, OPTIONS, BYE, CANCEL, ACK, PRACK, COMET, REFER, SUBSCRIBE, NOTIFY, INFO, UPDATE, REGISTER..CSeq: 101 INVITE..Max-Forwards: 69..Remote-Party-ID: < sip:1143314808@192.168.200.40 sip%3A1143314808@192.168.200.40

;party=calling;screen=yes;privacy=off..Timestamp: 1244643972..Contact: <

sip:1143314808@192.168.200.40:5060>..Expires: 180..Allow-Events: telephone-even t..Content-Type: application/sdp..Content-Length: 302....v=0..o=CiscoSystemsSIP-GW-UserAgent 8434 7851 IN IP4 192.168.200.40..s=SIP Call..c=IN IP4 192.1 68.200.40..t=0 0..m=audio 16836 RTP/AVP 18 8 100..c=IN IP4 192.168.200.40..a=rtpmap:18 G729/8000..a=fmtp:18 annexb=no..a=rtpmap:8 PCMA/8000..a=rtpmap:10 0 X-NSE/8000..a=fmtp:100 192-194..a=direction:passive.. # U 192.168.200.130:5060 -> 192.168.200.40:5060 SIP/2.0 100 Giving a try..Via: SIP/2.0/UDP 192.168.200.40:5060;branch=z9hG4bK6107AA91..From: <sip:1143314808@192.168.200.40 sip%3A1143314808@192.168.200.40>;tag=D41203B4-1763..To: <si p:3516380070@192.168.200.130 p%3A3516380070@192.168.200.130>..Call-ID: 7BE3750B-550111DE-86AD96C1-6209D7B9@192.168.200.40..CSeq: 101 INVITE..Server: Kamailio (1.4.3-notls (i386/linux) )..Content-Length: 0.... # U 192.168.216.4:5060 -> 192.168.200.130:5060 SIP/2.0 100 Trying..Call-ID:7BE3750B-550111DE-86AD96C1-6209D7B9@192.168.200.40..CSeq:101 INVITE..From:<sip:1143314808@192.168.200.40sip%3A1143314808@192.168.200.40

;tag=D41203B4-1763.

.To:<sip:3516380070@192.168.200.130 sip%3A3516380070@192.168.200.130>..Via:SIP/2.0/UDP 192.168.200.130;branch=z9hG4bKf574.3149a801.0..Via:SIP/2.0/UDP 192.168.200.40:5060;branch=z9hG4bK6 107AA91..Content-Length:0.... # U 192.168.216.4:5060 -> 192.168.200.130:5060 SIP/2.0 180 Ringing..Require:100rel..Supported:100rel..Record-Route:sip:192.168.200.130;lr=on;ftag=D41203B4-1763..Via:SIP/2.0/UDP 192.168.200.130;bran ch=z9hG4bKf574.3149a801.0..Via:SIP/2.0/UDP 192.168.200.40:5060 ;branch=z9hG4bK6107AA91..Call-ID:7BE3750B-550111DE-86AD96C1-6209D7B9@192.168.200.40. .CSeq: 101 INVITE..From:<sip:1143314808@192.168.200.40sip%3A1143314808@192.168.200.40

;tag=D41203B4-1763..To:<sip:3516380070@192.168.200.130sip%3A3516380070@192.168.200.130 ;tag=5358336B534F02B30582AFF0..RSeq:717562865..Co

ntact:sip:3516380070@192.168.200.130:5060..Content-Length:0.... # U 192.168.200.130:5060 -> 192.168.200.40:5060 SIP/2.0 180 Ringing..Require:100rel..Supported:100rel..Record-Route:sip:192.168.200.130;lr=on;ftag=D41203B4-1763..Via:SIP/2.0/UDP 192.168.200.40:5060;

branch=z9hG4bK6107AA91..Call-ID:7BE3750B-550111DE-86AD96C1-6209D7B9@192.168.200.40..CSeq:101 INVITE..From:<sip:1143314808@192.168.200.40sip%3A1143314808@192.168.200.40

;tag=D41203B4-1

763..To:<sip:3516380070@192.168.200.130 sip%3A3516380070@192.168.200.130

;tag=5358336B534F02B30582AFF0..RSeq:717562865..Contact:<

sip:3516380070@192.168.200.130:5060>..Content-Length:0.. .. # U 192.168.200.40:49395 -> 192.168.200.130:5060 PRACK sip:3516380070@192.168.200.130:5060 SIP/2.0..Via: SIP/2.0/UDP 192.168.200.40:5060;branch=z9hG4bK6107D249F..From: < sip:1143314808@192.168.200.40 sip%3A1143314808@192.168.200.40>; tag=D41203B4-1763..To: <sip:3516380070@192.168.200.130sip%3A3516380070@192.168.200.130>;tag=5358336B534F02B30582AFF0..Date: Wed, 10 Jun 2009 14:26:12 GMT..Call-ID: 7BE3750B-550111DE-86 AD96C1-6209D7B9@192.168.200.40..CSeq: 102 PRACK..RAck: 717562865 101 INVITE..Route: sip:192.168.200.130;lr=on;ftag=D41203B4-1763..Max-Forwards: 70..Co ntent-Length: 0.... # U 192.168.216.4:5060 -> 192.168.200.130:5060 SIP/2.0 180 Ringing..Require:100rel..Supported:100rel..Record-Route:sip:192.168.200.130;lr=on;ftag=D41203B4-1763..Via:SIP/2.0/UDP 192.168.200.130;bran ch=z9hG4bKf574.3149a801.0..Via:SIP/2.0/UDP 192.168.200.40:5060 ;branch=z9hG4bK6107AA91..Call-ID:7BE3750B-550111DE-86AD96C1-6209D7B9@192.168.200.40. .CSeq: 101 INVITE..From:<sip:1143314808@192.168.200.40sip%3A1143314808@192.168.200.40

;tag=D41203B4-1763..To:<sip:3516380070@192.168.200.130sip%3A3516380070@192.168.200.130 ;tag=5358336B534F02B30582AFF0..RSeq:717562865..Co

ntact:sip:3516380070@192.168.200.130:5060..Content-Length:0.... # U 192.168.200.130:5060 -> 192.168.200.40:5060 SIP/2.0 180 Ringing..Require:100rel..Supported:100rel..Record-Route:sip:192.168.200.130;lr=on;ftag=D41203B4-1763..Via:SIP/2.0/UDP 192.168.200.40:5060;

branch=z9hG4bK6107AA91..Call-ID:7BE3750B-550111DE-86AD96C1-6209D7B9@192.168.200.40..CSeq:101 INVITE..From:<sip:1143314808@192.168.200.40sip%3A1143314808@192.168.200.40

;tag=D41203B4-1

763..To:<sip:3516380070@192.168.200.130 sip%3A3516380070@192.168.200.130

;tag=5358336B534F02B30582AFF0..RSeq:717562865..Contact:<

sip:3516380070@192.168.200.130:5060>..Content-Length:0.. .. # U 192.168.200.40:49395 -> 192.168.200.130:5060 PRACK sip:3516380070@192.168.200.130:5060 SIP/2.0..Via: SIP/2.0/UDP 192.168.200.40:5060;branch=z9hG4bK6107D249F..From: < sip:1143314808@192.168.200.40 sip%3A1143314808@192.168.200.40>; tag=D41203B4-1763..To: <sip:3516380070@192.168.200.130sip%3A3516380070@192.168.200.130>;tag=5358336B534F02B30582AFF0..Date: Wed, 10 Jun 2009 14:26:12 GMT..Call-ID: 7BE3750B-550111DE-86 AD96C1-6209D7B9@192.168.200.40..CSeq: 102 PRACK..RAck: 717562865 101 INVITE..Route: sip:192.168.200.130;lr=on;ftag=D41203B4-1763..Max-Forwards: 70..Co ntent-Length: 0....

And then for OPENSER(192.168.200.10) AS5350(192.168.200.40) AR2810(192.168.216.4) # U 192.168.200.40:50112 -> 192.168.200.10:5060 INVITE sip:3516380070@192.168.200.10:5060 SIP/2.0..Via: SIP/2.0/UDP 192.168.200.40:5060;branch=z9hG4bK60D741D2C..From: < sip:1143314808@192.168.200.40 sip%3A1143314808@192.168.200.40>; tag=D3E4E024-AA5..To: <sip:3516380070@192.168.200.10sip%3A3516380070@192.168.200.10>..Date: Wed, 10 Jun 2009 13:36:54 GMT..Call-ID: 98989BF6-54FA11DE-818396C1-6209D7B9@192.168.200.40. .Supported: 100rel,timer,replaces..Min-SE: 1800..Cisco-Guid: 2560098254-1425674718-2728198171-1395155982..User-Agent: Cisco-SIPGateway/IOS-12.x..Allow: INVITE, OPTIONS, BYE, CANCEL, ACK, PRACK, COMET, REFER, SUBSCRIBE, NOTIFY, INFO, UPDATE, REGISTER..CSeq: 101 INVITE..Max-Forwards: 70..Remote-Party-ID: <sip:1143314808@192.168.200.40 sip%3A1143314808@192.168.200.40>;party=calling;screen=yes;privacy=off..Timestamp: 1244641014..Contact: sip:1143314808@192.168.200.40:5060..Expires: 18 0..Allow-Events: telephone-event..Content-Type: application/sdp..Content-Length: 302....v=0..o=CiscoSystemsSIP-GW-UserAgent 2319 3741 IN IP4 192.168.200 .40..s=SIP Call..c=IN IP4 192.168.200.40..t=0 0..m=audio 17416 RTP/AVP 18 8 100..c=IN IP4 192.168.200.40..a=rtpmap:18 G729/8000..a=fmtp:18 annexb=no..a= rtpmap:8 PCMA/8000..a=rtpmap:100 X-NSE/8000..a=fmtp:100 192-194..a=direction:passive.. # U 192.168.200.10:5060 -> 192.168.200.40:5060 SIP/2.0 407 Proxy Authentication Required..Via: SIP/2.0/UDP 192.168.200.40:5060;branch=z9hG4bK60D741D2C..From: < sip:1143314808@192.168.200.40 sip%3A1143314808@192.168.200.40>;tag=D3E4 E024-AA5..To: <sip:3516380070@192.168.200.10sip%3A3516380070@192.168.200.10>;tag=329cfeaa6ded039da25ff8cbb8668bd2.941d..Call-ID: 98989BF6-54FA11DE-818396C1-6209D7B9@192.168.200.40..CS eq: 101 INVITE..Proxy-Authenticate: Digest realm="metrotel", nonce="4a2fb81ca554f5ff9ab57d058348ca3a20e35893"..Server: OpenSER (1.2.2-notls (i386/linux) )..Content-Length: 0.... # U 192.168.200.40:5060 -> 192.168.200.10:5060 ACK sip:3516380070@192.168.200.10:5060 SIP/2.0..Via: SIP/2.0/UDP 192.168.200.40:5060;branch=z9hG4bK60D741D2C..From: < sip:1143314808@192.168.200.40 sip%3A1143314808@192.168.200.40>;tag =D3E4E024-AA5..To: <sip:3516380070@192.168.200.10sip%3A3516380070@192.168.200.10>;tag=329cfeaa6ded039da25ff8cbb8668bd2.941d..Date: Wed, 10 Jun 2009 13:36:54 GMT..Call-ID: 98989BF6-54F A11DE-818396C1-6209D7B9@192.168.200.40..Max-Forwards: 70..CSeq: 101 ACK..Content-Length: 0.... # U 192.168.200.40:50112 -> 192.168.200.10:5060 INVITE sip:3516380070@192.168.200.10:5060 SIP/2.0..Via: SIP/2.0/UDP 192.168.200.40:5060;branch=z9hG4bK60D751268..From: < sip:1143314808@192.168.200.40 sip%3A1143314808@192.168.200.40>; tag=D3E4E024-AA5..To: <sip:3516380070@192.168.200.10sip%3A3516380070@192.168.200.10>..Date: Wed, 10 Jun 2009 13:36:54 GMT..Call-ID: 98989BF6-54FA11DE-818396C1-6209D7B9@192.168.200.40. .Supported: 100rel,timer,replaces..Min-SE: 1800..Cisco-Guid: 2560098254-1425674718-2728198171-1395155982..User-Agent: Cisco-SIPGateway/IOS-12.x..Allow: INVITE, OPTIONS, BYE, CANCEL, ACK, PRACK, COMET, REFER, SUBSCRIBE, NOTIFY, INFO, UPDATE, REGISTER..CSeq: 102 INVITE..Max-Forwards: 70..Remote-Party-ID: <sip:1143314808@192.168.200.40 sip%3A1143314808@192.168.200.40>;party=calling;screen=yes;privacy=off..Timestamp: 1244641014..Contact: sip:1143314808@192.168.200.40:5060..Expires: 18 0..Allow-Events: telephone-event..Proxy-Authorization: Digest username="as5350",realm="metrotel",uri="sip:3516380070@192.168.200.10:5060 ",response="6a51

a32e9f21dadc67db011ab81af3f6",nonce="4a2fb81ca554f5ff9ab57d058348ca3a20e35893",algorithm=md5..Content-Type: application/sdp..Content-Length: 302....v=0. .o=CiscoSystemsSIP-GW-UserAgent 2319 3741 IN IP4 192.168.200.40..s=SIP Call..c=IN IP4 192.168.200.40..t=0 0..m=audio 17416 RTP/AVP 18 8 100..c=IN IP4 19 2.168.200.40..a=rtpmap:18 G729/8000..a=fmtp:18 annexb=no..a=rtpmap:8 PCMA/8000..a=rtpmap:100 X-NSE/8000..a=fmtp:100 192-194..a=direction:passive.. # U 192.168.200.10:5060 -> 192.168.200.40:5060 SIP/2.0 100 Giving a try..Via: SIP/2.0/UDP 192.168.200.40:5060;branch=z9hG4bK60D751268..From: <sip:1143314808@192.168.200.40 sip%3A1143314808@192.168.200.40>;tag=D3E4E024-AA5..To: <si p:3516380070@192.168.200.10 p%3A3516380070@192.168.200.10>..Call-ID: 98989BF6-54FA11DE-818396C1-6209D7B9@192.168.200.40..CSeq: 102 INVITE..Server: OpenSER (1.2.2-notls (i386/linux)). .Content-Length: 0.... # U 192.168.200.10:5060 -> 192.168.216.4:5060 INVITE sip:3516380070@192.168.216.4:5060;transport=udp SIP/2.0..Record-Route: sip:192.168.200.10;lr=on;ftag=D3E4E024-AA5..Via: SIP/2.0/UDP 192.168.200 .10;branch=z9hG4bK831b.861b9286.0..Via: SIP/2.0/UDP 192.168.200.40:5060;branch=z9hG4bK60D751268..From: <sip:1143314808@192.168.200.40 sip%3A1143314808@192.168.200.40

;tag=D3E4E024-AA5

..To: <sip:3516380070@192.168.200.10 sip%3A3516380070@192.168.200.10>..Date: Wed, 10 Jun 2009 13:36:54 GMT..Call-ID: 98989BF6-54FA11DE-818396C1-6209D7B9@192.168.200.40..Supported: 100r el,timer,replaces..Min-SE: 1800..Cisco-Guid: 2560098254-1425674718-2728198171-1395155982..User-Agent: Cisco-SIPGateway/IOS-12.x..Allow: INVITE, OPTIONS , BYE, CANCEL, ACK, PRACK, COMET, REFER, SUBSCRIBE, NOTIFY, INFO, UPDATE, REGISTER..CSeq: 102 INVITE..Max-Forwards: 70..Remote-Party-ID: <sip:1143314808 @192.168.200.40>;party=calling;screen=yes;privacy=off..Timestamp: 1244641014..Contact: sip:1143314808@192.168.200.40:5060..Expires: 180..Allow-Events: telephone-event..Content-Type: application/sdp..Content-Length: 302..P-hint: outbound....v=0..o=CiscoSystemsSIP-GW-UserAgent 2319 3741 IN IP4 192.168.2 00.40..s=SIP Call..c=IN IP4 192.168.200.40..t=0 0..m=audio 17416 RTP/AVP 18 8 100..c=IN IP4 192.168.200.40..a=rtpmap:18 G729/8000..a=fmtp:18 annexb=no.. a=rtpmap:8 PCMA/8000..a=rtpmap:100 X-NSE/8000..a=fmtp:100 192-194..a=direction:passive.. # U 192.168.216.4:5060 -> 192.168.200.10:5060 SIP/2.0 100 Trying..Call-ID:98989BF6-54FA11DE-818396C1-6209D7B9@192.168.200.40..CSeq:102 INVITE..From:<sip:1143314808@192.168.200.40sip%3A1143314808@192.168.200.40

;tag=D3E4E024-AA5..

To:<sip:3516380070@192.168.200.10 sip%3A3516380070@192.168.200.10>..Via:SIP/2.0/UDP 192.168.200.10;branch=z9hG4bK831b.861b9286.0..Via:SIP/2.0/UDP 192.168.200.40:5060;branch=z9hG4bK60D7 51268..Content-Length:0.... # U 192.168.216.4:5060 -> 192.168.200.10:5060 SIP/2.0 180 Ringing..Require:100rel..Supported:100rel..Record-Route:sip:192.168.200.10;lr=on;ftag=D3E4E024-AA5..Via:SIP/2.0/UDP 192.168.200.10;branch= z9hG4bK831b.861b9286.0..Via:SIP/2.0/UDP 192.168.200.40:5060 ;branch=z9hG4bK60D751268..Call-ID:98989BF6-54FA11DE-818396C1-6209D7B9@192.168.200.40. .CSeq:10 2 INVITE..From:<sip:1143314808@192.168.200.40sip%3A1143314808@192.168.200.40

;tag=D3E4E024-AA5..To:<sip:3516380070@192.168.200.10sip%3A3516380070@192.168.200.10 ;tag=5358336B534F54210582B350..RSeq:900097065..Contac

t:sip:3516380070@192.168.200.10:5060..Content-Length:0.... # U 192.168.200.10:5060 -> 192.168.200.40:5060 SIP/2.0 180 Ringing..Require:100rel..Supported:100rel..Record-Route:sip:192.168.200.10;lr=on;ftag=D3E4E024-AA5..Via:SIP/2.0/UDP 192.168.200.40:5060;br

anch=z9hG4bK60D751268..Call-ID:98989BF6-54FA11DE-818396C1-6209D7B9@192.168.200.40..CSeq:102 INVITE..From:<sip:1143314808@192.168.200.40sip%3A1143314808@192.168.200.40

;tag=D3E4E024-AA

5..To:<sip:3516380070@192.168.200.10 sip%3A3516380070@192.168.200.10

;tag=5358336B534F54210582B350..RSeq:900097065..Contact:<

sip:3516380070@192.168.200.10:5060>..Content-Length:0.... # U 192.168.200.40:50112 -> 192.168.200.10:5060 PRACK sip:3516380070@192.168.200.10:5060 SIP/2.0..Via: SIP/2.0/UDP 192.168.200.40:5060;branch=z9hG4bK60D77201C..From: < sip:1143314808@192.168.200.40 sip%3A1143314808@192.168.200.40>;t ag=D3E4E024-AA5..To: <sip:3516380070@192.168.200.10sip%3A3516380070@192.168.200.10>;tag=5358336B534F54210582B350..Date: Wed, 10 Jun 2009 13:36:54 GMT..Call-ID: 98989BF6-54FA11DE-81839 6C1-6209D7B9@192.168.200.40..CSeq: 103 PRACK..RAck: 900097065 102 INVITE..Route: sip:192.168.200.10;lr=on;ftag=D3E4E024-AA5..Proxy-Authorization: Dige st username="as5350",realm="metrotel",uri=" sip:3516380070@192.168.200.10:5060 ",response="df4f26f89f7a4eebb397266d31e71b38",nonce="4a2fb81ca554f5ff9ab57d 058348ca3a20e35893",algorithm=md5..Max-Forwards: 70..Content-Length: 0.... # U 192.168.200.10:5060 -> 192.168.216.4:5060 PRACK sip:3516380070@192.168.216.4:5060;transport=udp SIP/2.0..Record-Route: sip:192.168.200.10;lr=on;ftag=D3E4E024-AA5..Via: SIP/2.0/UDP 192.168.200. 10;branch=z9hG4bK931b.4afe556.0..Via: SIP/2.0/UDP 192.168.200.40:5060;branch=z9hG4bK60D77201C..From: <sip:1143314808@192.168.200.40 sip%3A1143314808@192.168.200.40

;tag=D3E4E024-AA5..

To: <sip:3516380070@192.168.200.10 sip%3A3516380070@192.168.200.10>;tag=5358336B534F54210582B350..Date: Wed, 10 Jun 2009 13:36:54 GMT..Call-ID: 98989BF6-54FA11DE-818396C1-6209D7B9@192. 168.200.40..CSeq: 103 PRACK..RAck: 900097065 102 INVITE..Proxy-Authorization: Digest username="as5350",realm="metrotel",uri=" sip:3516380070@192.168.200. <sip%3A3516380070@192.168.200.>

10:5060",response="df4f26f89f7a4eebb397266d31e71b38",nonce="4a2fb81ca554f5ff9ab57d058348ca3a20e35893",algorithm=md5..Max-Forwards: 70..Content-Length: 0 ..P-hint: rr-enforced.... # U 192.168.216.4:5060 -> 192.168.200.10:5060 SIP/2.0 200 OK..Call-ID:98989BF6-54FA11DE-818396C1-6209D7B9@192.168.200.40..CSeq:103 PRACK..From:<sip:1143314808@192.168.200.40 sip%3A1143314808@192.168.200.40

;tag=D3E4E024-AA5..To:<s

ip:3516380070@192.168.200.10 ip%3A3516380070@192.168.200.10>;tag=5358336B534F54210582B350..Via:SIP/2.0/UDP 192.168.200.10;branch=z9hG4bK931b.4afe556.0..Via:SIP/2.0/UDP 192.168.200.40: 5060;branch=z9hG4bK60D77201C..Content-Length:0.... # U 192.168.200.10:5060 -> 192.168.200.40:5060 SIP/2.0 200 OK..Call-ID:98989BF6-54FA11DE-818396C1-6209D7B9@192.168.200.40..CSeq:103 PRACK..From:<sip:1143314808@192.168.200.40 sip%3A1143314808@192.168.200.40

;tag=D3E4E024-AA5..To:<s

ip:3516380070@192.168.200.10 ip%3A3516380070@192.168.200.10>;tag=5358336B534F54210582B350..Via:SIP/2.0/UDP 192.168.200.40:5060;branch=z9hG4bK60D77201C..Content-Length:0....