Yes, I did the same thing as you mentioned and it still doing the same thing. Here is my setup:

mhomed=1

listen=udp:x.x.130.36:5060 # external IP

listen=udp:x.x.130.34:5060 # external IP

listen=udp:10.200.1.31:5060 # internal IP

If I removed .130.34, I got error saying no socket found.

Gary Chen

From: sr-users-bounces@lists.sip-router.org [mailto:sr-users-bounces@lists.sip-router.org] On Behalf Of Vitaliy Aleksandrov
Sent: Tuesday, July 03, 2012 10:27 AM
To: SIP Router - Kamailio (OpenSER) and SIP Express Router (SER) - Users Mailing List
Subject: Re: [SR-Users] ACK and BYE messages uses wrong socket.

Have you specified interfaces with "listen" command ?
I had a problem as you described and have fixed it by moving a listen directive with a "floating ip" to the top of the list.
So you can try to specify interfaces you will use for SIP and set a "virtual ip" at the top of that list.

Kamailio 3.2.0

I am trying to setup kamailio to do the sip trunking. It receive the sip traffic from customer and then send it to carrier.

I have two NIC interface’s assigned with three IP’s:

Interface 1: ( Public IP’s)

x.x.130.34

x.x.130.36 floating IP

interface 2: (private IP’s)

10.10.1.31

.36 is a floating IP assigned by Linux-HA (heartbeat/pacemaker).

I only want to use .36 to receive and send sip traffic.

I uses force_send_socket() to send INVITE with .36 IP. But the ACK message always want to use .34 IP even the Route header has .36 in it unless I force it with force_send_socket() .

How can I fix this problem?

See below for the SIP messages: (x.x.128.205 is customer IP, x.x.129.200 is PSTN gateway IP)

U x.x.128.205:51694 -> x.x.130.36:5060

INVITE sip:5033441174@x.x.130.36:5060 SIP/2.0..Via: SIP/2.0/UDP x.x.128.205:5060;branch=z9hG

4bK1D3CD1..From: <sip:5024427578@x.x.128.205>;tag=24513088-D59..To: <sip:5033441174@x.x.130.3

6>..Date: Tue, 03 Jul 2012 13:37:41 GMT..Call-ID: 1887588D-C44B11E1-BE38D697-98A3E39A@x.x.128.20

5..Supported: 100rel,timer,replaces..Min-SE: 1800..Cisco-Guid: 411443261-3293254113-3191264919-256

0877466..User-Agent: Cisco-SIPGateway/IOS-12.x..Allow: INVITE, OPTIONS, BYE, CANCEL, ACK, PRACK, CO

MET, REFER, SUBSCRIBE, NOTIFY, INFO, UPDATE, REGISTER..CSeq: 101 INVITE..Max-Forwards: 70..Remote-P

arty-ID: <sip:5024427578@x.x.128.205>;party=calling;screen=no;privacy=off..Timestamp: 1341322661

..Contact: <sip:5024427578@x.x.128.205:5060>..Expires: 180..Allow-Events: telephone-event..Conte

nt-Type: application/sdp..Content-Length: 366....v=0..o=CiscoSystemsSIP-GW-UserAgent 9094 579 IN IP

4 x.x.128.205..s=SIP Call..c=IN IP4 x.x.128.205..t=0 0..m=audio 19312 RTP/AVP 125 0 18 100 10

1..c=IN IP4 x.x.128.205..a=rtpmap:125 X-CCD/8000..a=rtpmap:0 PCMU/8000..a=rtpmap:18 G729/8000..a

=fmtp:18 annexb=yes..a=rtpmap:100 X-NSE/8000..a=fmtp:100 192-194..a=rtpmap:101 telephone-event/8000

..a=fmtp:101 0-16..

U x.x.130.36:5060 -> x.x.128.205:51694

SIP/2.0 100 trying -- your call is important to us..Via: SIP/2.0/UDP x.x.128.205:5060;branch=z9

hG4bK1D3CD1;rport=51694..From: <sip:5024427578@x.x.128.205>;tag=24513088-D59..To: <sip:502244117

4@x.x.130.36>..Call-ID: 1887588D-C44B11E1-BE38D697-98A3E39A@x.x.128.205..CSeq: 101 INVITE..Se

rver: LVS Proxy 1.0..Content-Length: 0....

U x.x.130.36:5060 -> x.x.129.200:5060

INVITE sip:15033441174@x.x.129.200:5060 SIP/2.0..Record-Route: <sip:x.x.130.36;lr=on>..Via: S

IP/2.0/UDP x.x.130.36;branch=z9hG4bKc2ce.17a955a3.0..Via: SIP/2.0/UDP x.x.128.205:5060;rport

=51694;branch=z9hG4bK1D3CD1..From: <sip:5024427578@x.x.128.205>;tag=24513088-D59..To: <sip:50224

41174@x.x.130.36>..Date: Tue, 03 Jul 2012 13:37:41 GMT..Call-ID: 1887588D-C44B11E1-BE38D697-98A3

E39A@x.x.128.205..Supported: 100rel,timer,replaces..Min-SE: 1800..Cisco-Guid: 411443261-3293254

113-3191264919-2560877466..User-Agent: Cisco-SIPGateway/IOS-12.x..Allow: INVITE, OPTIONS, BYE, CANC

EL, ACK, PRACK, COMET, REFER, SUBSCRIBE, NOTIFY, INFO, UPDATE, REGISTER..CSeq: 101 INVITE..Max-Forw

ards: 69..Remote-Party-ID: <sip:5024427578@x.x.128.205>;party=calling;screen=no;privacy=off..Tim

estamp: 1341322661..Contact: <sip:5024427578@x.x.128.205:51694>..Expires: 180..Allow-Events: tel

ephone-event..Content-Type: application/sdp..Content-Length: 375....v=0..o=CiscoSystemsSIP-GW-UserA

gent 9094 579 IN IP4 10.200.1.51..s=SIP Call..c=IN IP4 10.200.1.51..t=0 0..m=audio 20464 RTP/AVP 12

5 0 18 100 101..c=IN IP4 10.200.1.51..a=rtpmap:125 X-CCD/8000..a=rtpmap:0 PCMU/8000..a=rtpmap:18 G7

29/8000..a=fmtp:18 annexb=yes..a=rtpmap:100 X-NSE/8000..a=fmtp:100 192-194..a=rtpmap:101 telephone-

event/8000..a=fmtp:101 0-16..a=nortpproxy:yes..

U x.x.129.200:5060 -> x.x.130.36:5060

SIP/2.0 100 Trying..Via: SIP/2.0/UDP x.x.130.36;branch=z9hG4bKc2ce.17a955a3.0,SIP/2.0/UDP 216.4

9.128.205:5060;rport=51694;branch=z9hG4bK1D3CD1..From: <sip:5024427578@x.x.128.205>;tag=24513088

-D59..To: <sip:5033441174@x.x.130.36>;tag=F0695368-74F..Date: Tue, 03 Jul 2012 13:37:41 GMT..Cal

l-ID: 1887588D-C44B11E1-BE38D697-98A3E39A@x.x.128.205..Timestamp: 1341322661..Server: Cisco-SIPG

ateway/IOS-12.x..CSeq: 101 INVITE..Allow-Events: telephone-event..Content-Length: 0....

U x.x.129.200:5060 -> x.x.130.36:5060

SIP/2.0 183 Session Progress..Via: SIP/2.0/UDP x.x.130.36;branch=z9hG4bKc2ce.17a955a3.0,SIP/2.0/

UDP x.x.128.205:5060;rport=51694;branch=z9hG4bK1D3CD1..From: <sip:5024427578@x.x.128.205>;ta

g=24513088-D59..To: <sip:5033441174@x.x.130.36>;tag=F0695368-74F..Date: Tue, 03 Jul 2012 13:37:4

1 GMT..Call-ID: 1887588D-C44B11E1-BE38D697-98A3E39A@x.x.128.205..Timestamp: 1341322661..Server:

Cisco-SIPGateway/IOS-12.x..CSeq: 101 INVITE..Require: 100rel..RSeq: 6708..Allow: INVITE, OPTIONS, B

YE, CANCEL, ACK, PRACK, COMET, REFER, SUBSCRIBE, NOTIFY, INFO, UPDATE, REGISTER..Allow-Events: tele

phone-event..Contact: <sip:15033441174@x.x.129.200:5060>..Record-Route: <sip:x.x.130.36;lr=on

>..Content-Disposition: session;handling=required..Content-Type: application/sdp..Content-Length: 2

90....v=0..o=CiscoSystemsSIP-GW-UserAgent 2387 2116 IN IP4 x.x.129.200..s=SIP Call..c=IN IP4 216

.49.129.200..t=0 0..m=audio 18480 RTP/AVP 0 101 100..c=IN IP4 x.x.129.200..a=rtpmap:0 PCMU/8000.

.a=rtpmap:101 telephone-event/8000..a=fmtp:101 0-16..a=rtpmap:100 X-NSE/8000..a=fmtp:100 192-194..

U x.x.130.36:5060 -> x.x.128.205:51694

SIP/2.0 183 Session Progress..Via: SIP/2.0/UDP x.x.128.205:5060;rport=51694;branch=z9hG4bK1D3CD

1..From: <sip:5024427578@x.x.128.205>;tag=24513088-D59..To: <sip:5033441174@x.x.130.36>;tag=F

0695368-74F..Date: Tue, 03 Jul 2012 13:37:41 GMT..Call-ID: 1887588D-C44B11E1-BE38D697-98A3E39A@216.

49.128.205..Timestamp: 1341322661..Server: Cisco-SIPGateway/IOS-12.x..CSeq: 101 INVITE..Require: 10

0rel..RSeq: 6708..Allow: INVITE, OPTIONS, BYE, CANCEL, ACK, PRACK, COMET, REFER, SUBSCRIBE, NOTIFY,

INFO, UPDATE, REGISTER..Allow-Events: telephone-event..Contact: <sip:15033441174@x.x.129.200:50

60>..Record-Route: <sip:x.x.130.36;lr=on>..Content-Disposition: session;handling=required..Conte

nt-Type: application/sdp..Content-Length: 305....v=0..o=CiscoSystemsSIP-GW-UserAgent 2387 2116 IN I

P4 x.x.130.66..s=SIP Call..c=IN IP4 x.x.130.66..t=0 0..m=audio 19480 RTP/AVP 0 101 100..c=IN

IP4 x.x.130.66..a=rtpmap:0 PCMU/8000..a=rtpmap:101 telephone-event/8000..a=fmtp:101 0-16..a=rtpm

ap:100 X-NSE/8000..a=fmtp:100 192-194..a=nortpproxy:yes..

U x.x.128.205:51694 -> x.x.130.36:5060

PRACK sip:15033441174@x.x.129.200:5060 SIP/2.0..Via: SIP/2.0/UDP x.x.128.205:5060;branch=z9h

G4bK1D4474..From: <sip:5024427578@x.x.128.205>;tag=24513088-D59..To: <sip:5033441174@x.x.130.

36>;tag=F0695368-74F..Date: Tue, 03 Jul 2012 13:37:41 GMT..Call-ID: 1887588D-C44B11E1-BE38D697-98A3

E39A@x.x.128.205..CSeq: 102 PRACK..RAck: 6708 101 INVITE..Route: <sip:x.x.130.36;lr=on>..Max-

Forwards: 70..Content-Length: 0....

U x.x.130.34:5060 -> x.x.129.200:5060

PRACK sip:15033441174@x.x.129.200:5060 SIP/2.0..Via: SIP/2.0/UDP x.x.130.34;branch=z9hG4bK92c

e.4def8436.0..Via: SIP/2.0/UDP x.x.128.205:5060;rport=51694;branch=z9hG4bK1D4474..From: <sip:50

24427578@x.x.128.205>;tag=24513088-D59..To: <sip:5033441174@x.x.130.36>;tag=F0695368-74F..Dat

e: Tue, 03 Jul 2012 13:37:41 GMT..Call-ID: 1887588D-C44B11E1-BE38D697-98A3E39A@x.x.128.205..CSeq

: 102 PRACK..RAck: 6708 101 INVITE..Max-Forwards: 69..Content-Length: 0....

U x.x.129.200:5060 -> x.x.130.34:5060

SIP/2.0 200 OK..Via: SIP/2.0/UDP x.x.130.34;branch=z9hG4bK92ce.4def8436.0,SIP/2.0/UDP x.x.12

8.205:5060;rport=51694;branch=z9hG4bK1D4474..From: <sip:5024427578@x.x.128.205>;tag=24513088-D59

..To: <sip:5033441174@x.x.130.36>;tag=F0695368-74F..Date: Tue, 03 Jul 2012 13:37:41 GMT..Call-ID

: 1887588D-C44B11E1-BE38D697-98A3E39A@x.x.128.205..Server: Cisco-SIPGateway/IOS-12.x..CSeq: 102

PRACK..Content-Length: 0....

U x.x.130.36:5060 -> x.x.128.205:51694

SIP/2.0 200 OK..Via: SIP/2.0/UDP x.x.128.205:5060;rport=51694;branch=z9hG4bK1D4474..From: <sip:

5024427578@x.x.128.205>;tag=24513088-D59..To: <sip:5033441174@x.x.130.36>;tag=F0695368-74F..D

ate: Tue, 03 Jul 2012 13:37:41 GMT..Call-ID: 1887588D-C44B11E1-BE38D697-98A3E39A@x.x.128.205..Se

rver: Cisco-SIPGateway/IOS-12.x..CSeq: 102 PRACK..Content-Length: 0....

U x.x.129.200:5060 -> x.x.130.36:5060

SIP/2.0 200 OK..Via: SIP/2.0/UDP x.x.130.36;branch=z9hG4bKc2ce.17a955a3.0,SIP/2.0/UDP x.x.12

8.205:5060;rport=51694;branch=z9hG4bK1D3CD1..From: <sip:5024427578@x.x.128.205>;tag=24513088-D59

..To: <sip:5033441174@x.x.130.36>;tag=F0695368-74F..Date: Tue, 03 Jul 2012 13:37:41 GMT..Call-ID

: 1887588D-C44B11E1-BE38D697-98A3E39A@x.x.128.205..Timestamp: 1341322661..Server: Cisco-SIPGatew

ay/IOS-12.x..CSeq: 101 INVITE..Allow: INVITE, OPTIONS, BYE, CANCEL, ACK, PRACK, COMET, REFER, SUBSC

RIBE, NOTIFY, INFO, UPDATE, REGISTER..Allow-Events: telephone-event..Contact: <sip:15033441174@216.

49.129.200:5060>..Record-Route: <sip:x.x.130.36;lr=on>..Content-Type: application/sdp..Content-L

ength: 290....v=0..o=CiscoSystemsSIP-GW-UserAgent 2387 2116 IN IP4 x.x.129.200..s=SIP Call..c=IN

IP4 x.x.129.200..t=0 0..m=audio 18480 RTP/AVP 0 101 100..c=IN IP4 x.x.129.200..a=rtpmap:0 PC

MU/8000..a=rtpmap:101 telephone-event/8000..a=fmtp:101 0-16..a=rtpmap:100 X-NSE/8000..a=fmtp:100 19

2-194..

U x.x.130.36:5060 -> x.x.128.205:51694

SIP/2.0 200 OK..Via: SIP/2.0/UDP x.x.128.205:5060;rport=51694;branch=z9hG4bK1D3CD1..From: <sip:

5024427578@x.x.128.205>;tag=24513088-D59..To: <sip:5033441174@x.x.130.36>;tag=F0695368-74F..D

ate: Tue, 03 Jul 2012 13:37:41 GMT..Call-ID: 1887588D-C44B11E1-BE38D697-98A3E39A@x.x.128.205..Ti

mestamp: 1341322661..Server: Cisco-SIPGateway/IOS-12.x..CSeq: 101 INVITE..Allow: INVITE, OPTIONS, B

YE, CANCEL, ACK, PRACK, COMET, REFER, SUBSCRIBE, NOTIFY, INFO, UPDATE, REGISTER..Allow-Events: tele

phone-event..Contact: <sip:15033441174@x.x.129.200:5060>..Record-Route: <sip:x.x.130.36;lr=on

>..Content-Type: application/sdp..Content-Length: 305....v=0..o=CiscoSystemsSIP-GW-UserAgent 2387 2

116 IN IP4 x.x.130.66..s=SIP Call..c=IN IP4 x.x.130.66..t=0 0..m=audio 19480 RTP/AVP 0 101 10

0..c=IN IP4 x.x.130.66..a=rtpmap:0 PCMU/8000..a=rtpmap:101 telephone-event/8000..a=fmtp:101 0-16

..a=rtpmap:100 X-NSE/8000..a=fmtp:100 192-194..a=nortpproxy:yes..

U x.x.128.205:51694 -> x.x.130.36:5060

ACK sip:15033441174@x.x.129.200:5060 SIP/2.0..Via: SIP/2.0/UDP x.x.128.205:5060;branch=z9hG4

bK1D5DA6..From: <sip:5024427578@x.x.128.205>;tag=24513088-D59..To: <sip:5033441174@x.x.130.36

>;tag=F0695368-74F..Date: Tue, 03 Jul 2012 13:37:41 GMT..Call-ID: 1887588D-C44B11E1-BE38D697-98A3E3

9A@x.x.128.205..Route: <sip:x.x.130.36;lr=on>..Max-Forwards: 70..CSeq: 101 ACK..Content-Lengt

h: 0....

U x.x.130.34:5060 -> x.x.129.200:5060

ACK sip:15033441174@x.x.129.200:5060 SIP/2.0..Via: SIP/2.0/UDP x.x.130.34;branch=z9hG4bKcydzi

gwkX..Via: SIP/2.0/UDP x.x.128.205:5060;rport=51694;branch=z9hG4bK1D5DA6..From: <sip:5024427578

@x.x.128.205>;tag=24513088-D59..To: <sip:5033441174@x.x.130.36>;tag=F0695368-74F..Date: Tue,

03 Jul 2012 13:37:41 GMT..Call-ID: 1887588D-C44B11E1-BE38D697-98A3E39A@x.x.128.205..Max-Forwards

: 69..CSeq: 101 ACK..Content-Length: 0....

U x.x.128.205:51694 -> x.x.130.36:5060

BYE sip:15033441174@x.x.129.200:5060 SIP/2.0..Via: SIP/2.0/UDP x.x.128.205:5060;branch=z9hG4

bK1D61CE7..From: <sip:5024427578@x.x.128.205>;tag=24513088-D59..To: <sip:5033441174@x.x.130.3

6>;tag=F0695368-74F..Date: Tue, 03 Jul 2012 13:37:41 GMT..Call-ID: 1887588D-C44B11E1-BE38D697-98A3E

39A@x.x.128.205..User-Agent: Cisco-SIPGateway/IOS-12.x..Max-Forwards: 70..Route: <sip:x.x.130

.36;lr=on>..Timestamp: 1341322666..CSeq: 103 BYE..Reason: Q.850;cause=16..Content-Length: 0....

U x.x.130.34:5060 -> x.x.129.200:5060

BYE sip:15033441174@x.x.129.200:5060 SIP/2.0..Via: SIP/2.0/UDP x.x.130.34;branch=z9hG4bKa2ce.

4ba2ee65.0..Via: SIP/2.0/UDP x.x.128.205:5060;rport=51694;branch=z9hG4bK1D61CE7..From: <sip:502

4427578@x.x.128.205>;tag=24513088-D59..To: <sip:5033441174@x.x.130.36>;tag=F0695368-74F..Date

: Tue, 03 Jul 2012 13:37:41 GMT..Call-ID: 1887588D-C44B11E1-BE38D697-98A3E39A@x.x.128.205..User-

Agent: Cisco-SIPGateway/IOS-12.x..Max-Forwards: 69..Timestamp: 1341322666..CSeq: 103 BYE..Reason: Q

.850;cause=16..Content-Length: 0....

U x.x.129.200:5060 -> x.x.130.34:5060

SIP/2.0 200 OK..Via: SIP/2.0/UDP x.x.130.34;branch=z9hG4bKa2ce.4ba2ee65.0,SIP/2.0/UDP x.x.12

8.205:5060;rport=51694;branch=z9hG4bK1D61CE7..From: <sip:5024427578@x.x.128.205>;tag=24513088-D5

9..To: <sip:5033441174@x.x.130.36>;tag=F0695368-74F..Date: Tue, 03 Jul 2012 13:37:46 GMT..Call-I

D: 1887588D-C44B11E1-BE38D697-98A3E39A@x.x.128.205..Server: Cisco-SIPGateway/IOS-12.x..Timestamp

: 1341322666..Content-Length: 0..CSeq: 103 BYE....

U x.x.130.36:5060 -> x.x.128.205:51694

SIP/2.0 200 OK..Via: SIP/2.0/UDP x.x.128.205:5060;rport=51694;branch=z9hG4bK1D61CE7..From: <sip

:5024427578@x.x.128.205>;tag=24513088-D59..To: <sip:5033441174@x.x.130.36>;tag=F0695368-74F..

Date: Tue, 03 Jul 2012 13:37:46 GMT..Call-ID: 1887588D-C44B11E1-BE38D697-98A3E39A@x.x.128.205..S

erver: Cisco-SIPGateway/IOS-12.x..Timestamp: 1341322666..Content-Length: 0..CSeq: 103 BYE....

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