SIP trunk can't hang up call

Asterisk Asterisk Support
1

I’m having an odd problem. I’ve previously had one way audio trouble with calls through my remote SIP trunk due to a crud router which wasn’t properly capable of port forwarding.

I am now behind a pfsense firewall instead which is much better, and following the guide on their own website I have SIP calls to the phone network working nicely with two way audio.

However I have now noticed there is another problem, and that is that I cannot hang up. This only seems to happen if the other party does not answer the call. The asterisk console shows the following:

Executing [phone number removed@internal:1] Set("SIP/201-09785468", "CALLERID(num)=sip ID removed") in new stack
Executing [phone number removed@internal:2] Dial("SIP/201-09785468", "SIP/phone number removed@sipgate|25|trg") in new stack
Called phone number removed@sipgate
SIP/sipgate-0978f250 is making progress passing it to SIP/201-09785468
Spawn extension (internal, phone number removed, 2) exited non-zero on 'SIP/201-09785468'
[Jun  2 22:21:49] WARNING[7282]: chan_sip.c:12984 handle_response: Remote host can't match request CANCEL to call '438fd77a3e53aba004e7bf18021fc8da@sipgate.co.uk'. Giving up.

The SIP trunk I am using is sipgate basic. I have no idea what the great big long string of characters before the final @sipgate.co.uk is all about.

Is this a network configuration issue, an asterisk configuration issue, or a sipgate issue?

2

Likely to be sipgate or the network. It would help to have the contents of the INVITE, the most recent interim response, and the CANCEL, particularly the Call-ID and the tags on the To and From lines.

3

The Request-URI, Call-ID, To, the numeric part of CSeq, and From header
fields in the CANCEL request MUST be identical to those in the request being cancelled,

4

Why is the call ID getting mashed up in the cancel request then? It shows the correct phone number in all other parts .

5

In order to diagnose this issue a full sip trace is needed on both side Asterisk and your carrier

6

The number in the CANCEL is not the phone number, it is the Call-ID, which is why you need to provide the information from the trace.

(Ideally you want a trace from the far side of the router, as the router may be changing these details.