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<span><b>Description<br>

</b></span>

<div>I'm running Kamailio 5.2.0, whenever I relay an invite via Kamailio, my original contact header is changed from the original:<br>

</div>

<div>sip:+XXXXXXXXX@YYY.YYY.YYY.YYYY:5060;transport=udp;gw=netvision<br>

</div>

<div>To<br>

</div>

<div>sip:YYY.YYY.YYY.YYY;line=sr-.n274i0TMfsHMcCAlVyAMV5IlgCXvV8n4edQlgIUlgKQ4Vk74gI1LmZ69NM79FZAR3JC.cDNLfHUj3Wnp3MP9nd*.<br>

</div>

<div>Even when I set it correctly on my route, using:<br>

</div>

<div>remove_hf("Contact");<br>

</div>

<div>append_hf("Contact: sip:$tU@YYY.YYY.YYY.YYY:5060;transport=udp;gw=netvision\r\n", "Contact");<br>

</div>

<div><br>

</div>

<div>It still ends up being modified. </div>

<div>What can I do to keep the contact header as it is?<br>

</div>

<div><br>

</div>

<div><b>SIP Traffic<br>

</b></div>

<div>U YYY.YYY.YYY.YYY:5060 -> 81.24.193.248:5060<br>

</div>

<div>INVITE sip:+442033202609@81.24.193.248:5060 SIP/2.0.<br>

</div>

<div>Record-Route: <sip:YYY.YYY.YYY.YYY;r2=on;lr=on;ftag=mp0S9yH11vryH;vsf=AAAAAAAAAAAAAAAAAAAAAAADCAEACRgPGB8AAy4xNjM->.<br>

</div>

<div>Record-Route: <sip:2YYY.YYY.YYY.YYY;line=sr-.n274V8TlidQMVyUlg87vV8nlfDXlVHB9VD0.VHB9VDoLGtNRbH7ltlTEkyQl3jXEky1LNMoRkt5ukt5ukt5ukt5ukt5ukt5ukt5ukt5W8M5WktckoLuWAsduktTMm64pCAD>.<br>

</div>

<div>Via: SIP/2.0/UDP YYY.YYY.YYY.YYY;branch=z9hG4bK53e9.308596b23ed683368534c9d609dce0f6.0.<br>

</div>

<div>Via: SIP/2.0/UDP YYY.YYY.YYY.YYY;branch=z9hG4bKsr-kA2uvfsUlerJWtIylgCXvV8n4edQlgIUlgKQ4Vk74gI1.oJVjb2njburlgCXvV8n4edQlgIUlgKQ4HWsRbWPLVDX.GrXLcAHlcC74nZXKbTVpcHh4b6mMGZvJgLsLcJTkgtGu2PGgy**.<br>

</div>

<div>Max-Forwards: 67.<br>

</div>

<div>From: +18702935016 <sip:+18702935016@YYY.YYY.YYY.YYY>;tag=mp0S9yH11vryH.<br>

</div>

<div>To: <sip:+442033202609@81.24.193.248>.<br>

</div>

<div>Call-ID: !!:jbkfMgyHjbsDjblfjqAQlVldvgyHKolDlcIHlcknKVIdjcIT.<br>

</div>

<div>CSeq: 18182498 INVITE.<br>

</div>

<div>Contact: <sip:YYY.YYY.YYY.YYY;line=sr-.n274i0TMfsHMcCAlVyAMV5IlgCXvV8n4edQlgIUlgKQ4Vk74gI1LmZ69NM79FZAR3JC.cDNLfHUj3Wnp3MP9nd*>.<br>

</div>

<div>User-Agent: FreeSWITCH-mod_sofia/1.9.0+git~20180706T160334Z~de3df8dc0e~64bit.<br>

</div>

<div>Allow: INVITE, ACK, BYE, CANCEL, OPTIONS, MESSAGE, INFO, UPDATE, REGISTER, REFER, NOTIFY.<br>

</div>

<div>Supported: timer, path, replaces.<br>

</div>

<div>Allow-Events: talk, hold, conference, refer.<br>

</div>

<div>Content-Type: application/sdp.<br>

</div>

<div>Content-Disposition: session.<br>

</div>

<div>Content-Length: 224.<br>

</div>

<div>Remote-Party-ID: "+18702935016" <sip:+18702935016@YYY.YYY.YYY.YYY>;party=calling;screen=yes;privacy=off.<br>

</div>

<div>.<br>

</div>

<div>v=0.<br>

</div>

<div>o=FreeSWITCH 1585439298 1585439299 IN IP4 ZZZ.ZZZ.ZZZ.ZZZ.<br>

</div>

<div>s=FreeSWITCH.<br>

</div>

<span>c=IN IP4 ZZZ.ZZZ</span><br>

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