Responding to myself: attached is an ngrep (made by homer/sipcature server). Some strange things are happening. When I do a ngrep on the Kamailio, I see the ACK gets mangled:

SIP UA -> Kamalio
ACK sip:08000403@10.254.254.20:5060 SIP/2.0.
Via: SIP/2.0/UDP 192.168.1.10:56953;branch=z9hG4bK-d8754z-170b73a13fd7a39d-1---d8754z-.
Max-Forwards: 70.
Route: <sip:10.254.254.1;lr;ftag=868b7d56;nat=yes;vsf=czFwOkQpYzVueyNnLEMbCDY6fyo/ejIqLXoQM2IvdwpSA14CTmo8PmQ->.
Contact: <sip:r.voermans@192.168.1.10:56953;transport=UDP>.
To: <sip:08000403@10.254.254.1;transport=UDP>;tag=a94c095b773be1dd6e8d668a785a9c84dac9696f.
From: "testcallerid"<sip:r.voermans@10.254.254.1;transport=UDP>;tag=868b7d56.
Call-ID: YWYwY2M0MTcwM2VmMTUxMTdkMTUwNDFhM2E2NjI3MTg..
CSeq: 2 ACK.
Proxy-Authorization: Digest username="r.voermans",realm="10.254.254.1",nonce="USabJ1EmmfuYD+XnJVMqKQkK6/VmiXJ8",uri="sip:08000403@10.254.254.1;transport=UDP",response="25e0d8980c67d1785948a44de4e51b44",algorithm=MD5.
User-Agent: Zoiper Communicator 2.04.10164 rev.10204.
Content-Length: 0.
.

Kamailio -> SIP UA
U 2013/02/21 23:04:52.911391 10.254.254.1:5060 -> 10.254.254.20:5060
ACK sip:08000403@10.254.254.20:5060 SIP/2.0.
Record-Route: <sip:10.254.254.1;lr;ftag=868b7d56;nat=yes>.
Via: SIP/2.0/UDP 10.254.254.1;branch=z9hG4bKcydzigwkX.
Via: SIP/2.0/UDP 192.168.1.10:56953;rport=56953;branch=z9hG4bK-d8754z-170b73a13fd7a39d-1---d8754z-.
Max-Forwards: 69.
Contact: <sip:r.voermans@192.168.1.10:56953;transport=UDP>.
To: <sip:#x)1,+2']..qmu.vinu5l{3(yuv....O!y.DP>;tag=a94c095b773be1dd6e8d668a785a9c84dac9696f.
From: "testcallerid"<sip:anonymous@anonymous.invalid>;tag=868b7d56.
Call-ID: YWYwY2M0MTcwM2VmMTUxMTdkMTUwNDFhM2E2NjI3MTg..
CSeq: 2 ACK.
User-Agent: Zoiper Communicator 2.04.10164 rev.10204.
Content-Length: 0.
.

restore_mode modparam is set to 'auto', and I checked that the vsf in Route-headers are correct. Any clues?

Regards,
Ronald

Op 21 feb. 2013, om 16:49 heeft Ronald Voermans <r.voermans@global-datacenter.nl<mailto:r.voermans@global-datacenter.nl>> het volgende geschreven:

Hi,

this last weekend we went live from the old 3.0 version to the latest stable release of Kamailio (3,3,0). All went well, except for one issue. We make use of uac_replace_from in our config, in case a client needs CLIR: uac_replace_from("Anonymous","sip:anonymous@anonymous.invalid");

Since the upgrade we receive the following error:

uac [replace.c:521]: new URI shorter than old URI

Which causes the call to be disconnected after about 20/30 seconds. This, because the ACK is received by Kamailio, but cannot be 'linked' to the transaction i guess.

What is exactly causing this issue and, more importantly, is there any way to resolve this?

Thanks in advance,

Regards,
Ronald Voermans

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