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### Description Hi Team, I am using kamailio as load balancer in my organization and I want to manipulate the cancel request from and to headers. But kamailio is changing the requests when it sends out and its still using the one it receives from other end.

How do I change the kamailio to change the to domain when it sends the cancel request out? <!-- Explain what you did, what you expected to happen, and what actually happened. -->

### Troubleshooting Code to handle cancel if (is_method("CANCEL")) { if (ends_with($td, "incoming.req.com")) { xinfo("Updating CANCEL request"); uac_replace_to("sip:<number>@manipulated.to.domain.com"); $uac_req(turi)="sip:<number>@manipulated.to.domain.com"; append_hf("To: <"sip:<number>@manipulated.to.domain.com">"); #uac_req_send(); xinfo("Updating CANCEL request TD: $td"); } if (t_check_trans()) { route(RELAY); } exit; }

SIP message: CANCEL sip:<number>@mycompany.net SIP/2.0 Via: SIP/2.0/UDP <IP>;branch=z9hG4bK787.76dc73a7e90664fa84d8571e1281161d.0 Max-Forwards: 69 From: <sip:<fromNumber>@incoming.req.com>;tag=QQ8NBSygKDa0c To: <sip:<toNumber>@incoming.req.com> Call-ID: 1cc67943-bb08-4e52-9694-cb33210e7b3b CSeq: 65568792 CANCEL Content-Length: 0 Reason: Q.850;cause=16;text="NORMAL_CLEARING"

#### Reproduction

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#### Debugging Data

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``` (paste your debugging data here) ```

#### Log Messages

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#### SIP Traffic

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``` (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) ```