Hi Daniel,

Got it. Thanks for taking the time to look into it, I'll dig further, let you know if I find what's causing it.

Regards, --Sergiu

On Tue, May 26, 2020 at 2:10 PM Daniel-Constantin Mierla miconda@gmail.com wrote:

Hello,

that is the received CANCEL, not the one sent out by Kamailio. The Via branch generated by Kamailio has the format present in the CANCEL sent to downstream.

Probably there is some setting in the system (ip forwarding) causing it or something else out of Kamailio control.

Cheers, Daniel On 26.05.20 17:34, Sergiu Pojoga wrote:

Hi gents,

Got this weird "problem", where CANCEL request is relayed to both the right destination as well as the 255.255.255.255 broadcast address!? I have no such logic in my script, that's for sure.

I doesn't do anything harmful (as far as I can tell), but I'm just curious why it's doing that. Any ideas?

version: kamailio 5.3.4

*SIP Trace:*

U 2020/05/26 08:40:10.941722 PBXIP:5060 -> KAMAILIO_IP:5060 CANCEL sip:2383@DOWNSTREAM_IP:10533;transport=TLS SIP/2.0 Via: SIP/2.0/UDP PBXIP:5060;branch=z9hG4bK450689d6 Max-Forwards: 69 From: "some callerid" sip:18001111111@mypbx.mydomain.com;tag=as4d223616 To: sip:2383@DOWNSTREAM_IP:10533;transport=TLS Call-ID: 1511475b69f6379b08f04d110f534da1@mypbx.mydomain.com CSeq: 102 CANCEL User-Agent: B2B Content-Length: 0

U 2020/05/26 08:40:10.941799 KAMAILIO_IP:5060 -> 255.255.255.255:5060 CANCEL sip:2383@DOWNSTREAM_IP:10533;transport=TLS SIP/2.0 Via: SIP/2.0/UDP PBXIP:5060;branch=z9hG4bK450689d6 Max-Forwards: 69 From: "some callerid" sip:18001111111@mypbx.mydomain.com;tag=as4d223616 To: sip:2383@DOWNSTREAM_IP:10533;transport=TLS Call-ID: 1511475b69f6379b08f04d110f534da1@mypbx.mydomain.com CSeq: 102 CANCEL User-Agent: B2B Content-Length: 0

T 2020/05/26 08:40:10.941899 KAMAILIO_IP:5061 -> DOWNSTREAM_IP:10533 CANCEL sip:2383@DOWNSTREAM_IP:10533;transport=TLS SIP/2.0 Via: SIP/2.0/TLS proxy.mydomain.com:5061;branch=z9hG4bK3cbb.4c6a526982fa1fb93ca1ba73afd8484f.0

Max-Forwards: 69 From: "some callerid" sip:18001111111@mypbx.mydomain.com;tag=as4d223616 To: sip:2383@DOWNSTREAM_IP:10533;transport=TLS Call-ID: 1511475b69f6379b08f04d110f534da1@mypbx.mydomain.com CSeq: 102 CANCEL Content-Length: 0

U 2020/05/26 08:40:10.941935 KAMAILIO_IP:5060 -> PBXIP:5060 SIP/2.0 200 canceling Via: SIP/2.0/UDP PBXIP:5060;branch=z9hG4bK450689d6 From: "some callerid" sip:18001111111@mypbx.mydomain.com;tag=as4d223616 To: sip:2383@DOWNSTREAM_IP:10533;transport=TLS ;tag=a6a1c5f60faecf035a1ae5b6e96e979a-612a1516 Call-ID: 1511475b69f6379b08f04d110f534da1@mypbx.mydomain.com CSeq: 102 CANCEL Server: Edge Content-Length: 0

Thanks, --Sergiu

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-- Daniel-Constantin Mierla -- www.asipto.comwww.twitter.com/miconda -- www.linkedin.com/in/miconda Funding: https://www.paypal.me/dcmierla