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### Description When we send any custom header in the CANCEL Request.. same request is not forwarding to the down stream. Custom Header are missing in th request which is received by the downstream.
We are using t_relay() to forwards the request.
Please let me know if any parameters are required to be enabled for this issue.
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### Troubleshooting
#### Reproduction
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#### Debugging Data
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``` (paste your debugging data here) ```
#### Log Messages
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``` (paste your log messages here) ```
#### SIP Traffic
<!-- If the issue is exposed by processing specific SIP messages, grab them with ngrep or save in a pcap file, then add them next, or attach to issue, or provide a link to download them (e.g., to a pastebin site). --> Upstream CANCEL Request Sent ---------------------------------------------- Session Initiation Protocol (CANCEL) Request-Line: CANCEL sip:inbound@192.168.2.200:5060;transport=UDP SIP/2.0 Message Header Via: SIP/2.0/UDP 192.168.2.192:8000;branch=z9hG4bK-25588-1-0 From: sip:inbound@192.168.2.192:8000;tag=1 To: sip:inbound@192.168.2.200:5060;user=phone Call-ID: 1-25588@192.168.2.192 [Generated Call-ID: 1-25588@192.168.2.192] CSeq: 1 CANCEL Max-Forwards: 70 Session-ID: 357f74433c5454178cde3d5278b40ec6 User-Agent: A175 Collaboration Tablet Content-Length: 0
Down Stream CANCEL Request received ---------------------------------------------------- Session Initiation Protocol (CANCEL) Request-Line: CANCEL sip:inbound@192.168.2.200:5060;transport=UDP SIP/2.0 Message Header From: sip:inbound@192.168.2.192:8000;tag=1 To: sip:inbound@192.168.2.200:5060;user=phone Call-ID: 1-25588@192.168.2.192 [Generated Call-ID: 1-25588@192.168.2.192] CSeq: 1 CANCEL Via: SIP/2.0/UDP 192.168.1.200;branch=z9hG4bK561f.944ad825d740820aeb834f49c3cea1b7.0;rport Max-Forwards: 69 Content-Length: 0
``` (paste your sip traffic here) ```
### Possible Solutions
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### Additional Information
* **Kamailio Version** - output of `kamailio -v`
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* **Operating System**:
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``` (paste your output here) ```