<div dir="ltr">Hello, I am green hand here.<br>In my case, with topology_hiding and fU&tU rewrite, I have to mask initial fU & tU when proxying sip messages. All succeed, but CANCEL message inited locally by server, I can not change fu & tu, If I do it manually, tm can not match. Any suggestions?<br><br>thing I have:<br><br><b><font color="#3d85c6">CANCEL sip:a.rewrite@b.domain:5060 SIP/2.0                                                                                 <br>Via: SIP/2.0/UDP proxy.domain:5060;branch=z9hG4bK932b.33154787.0                                                                              <br>From: <sip:a@a.domain>;tag=877556c1e3e94f9da53100d72eefa195                                                                        <br>Call-ID: TArYzB5EQMMZ3w1Yi5JAwtle2Bne0QGXmovMTc-                                                                                    <br>To: <sip:b@proxy.domain>                                                                                                      <br>CSeq: 26759 CANCEL                                                                                                                             <br>Max-Forwards: 70                                                                                                                               <br>Reason: SIP;cause=487;text="ORIGINATOR_CANCEL"                                                                                                 <br>User-Agent: OpenSIPS (3.5.2 (x86_64/linux))                                                                                                    <br>Content-Length: 0  </font></b><br><br><div><br></div><div>thing I want:<br><br><font color="#6aa84f"><b>CANCEL sip:a.rewrite@b.domain:5060 SIP/2.0                                                                                 <br>Via: SIP/2.0/UDP proxy.domain:5060;branch=z9hG4bK932b.33154787.0                                                                              <br>From: <sip:a.rewrite@a.domain>;tag=877556c1e3e94f9da53100d72eefa195                                                                        <br>Call-ID: TArYzB5EQMMZ3w1Yi5JAwtle2Bne0QGXmovMTc-                                                                                    <br>To: <sip:b.rewrite@proxy.domain>                                                                                                      <br>CSeq: 26759 CANCEL                                                                                                                             <br>Max-Forwards: 70                                                                                                                               <br>Reason: SIP;cause=487;text="ORIGINATOR_CANCEL"                                                                                                 <br>User-Agent: OpenSIPS (3.5.2 (x86_64/linux))                                                                                                    <br>Content-Length: 0  </b></font><br></div></div>