[Serusers] Yet another ACK issue

[Java Rockx]

Hi all.

For some reason this ACK looped and I have no idea why. It's very suspicious 
that the Record-Route in the second ACK has a branch=0 tag. 

NOTE: 10.3.0.221 <http://10.3.0.221> is the IP of my ser proxy. It sits 
behind a Cisco 3600 so the IPs have been rewritten to
10.3.0.221<http://10.3.0.221>
.

Can anyone give a pointer?
Regards,
Paul

U 2005/04/05 21:06:29.459587 66.90.50.230:54115 <http://66.90.50.230:54115>-> 
10.3.0.221:5060 <http://10.3.0.221:5060>
ACK sip:8664365708 at sipdev.mycompany.com SIP/2.0.
Via: SIP/2.0/UDP 172.16.1.42:5060 <http://172.16.1.42:5060>
;branch=z9hG4bK1177883239.
From: Paul Hazlett <sip:3212514240 at sipdev.mycompany.com>;tag=1697105220.
To: <sip:8664365708 at sipdev.mycompany.com>;tag=06922fcc.
Call-ID: 3209616113 at 172.16.1.42.
CSeq: 2301 ACK.
Content-Length: 0.
.

#
U 2005/04/05 21:06:29.692031 10.3.0.221:5060 <http://10.3.0.221:5060> -> 
10.3.0.221:5060 <http://10.3.0.221:5060>
ACK sip:8664365708 at sipdev.mycompany.com SIP/2.0.
Max-Forwards: 10.
Record-Route: <sip:10.3.0.221 <http://10.3.0.221>;ftag=1697105220;lr>.
Via: SIP/2.0/UDP 10.3.0.221 <http://10.3.0.221>;branch=0.
Via: SIP/2.0/UDP 172.16.1.42:5060 <http://172.16.1.42:5060>;received=
66.90.50.230 <http://66.90.50.230>;branch=z9hG4bK1177883239.
From: Paul Hazlett <sip:3212514240 at sipdev.mycompany.com>;tag=1697105220.
To: <sip:8664365708 at sipdev.mycompany.com>;tag=06922fcc.
Call-ID: 3209616113 at 172.16.1.42.
CSeq: 2301 ACK.
Content-Length: 0.
P-hint: Local Destination.
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