<p></p>
<p>SIP Capture attached for two register attempts, one on UDP and the other on TCP.</p>
<p>UDP =<br>
U 2001:8004:13c0:5fed:dd64:812e:f2cd:8bf6:45417 -> fd00:db8:deca::4:5060 <a class="issue-link js-issue-link" data-error-text="Failed to load title" data-id="870199801" data-permission-text="Title is private" data-url="https://github.com/kamailio/kamailio/issues/2718" data-hovercard-type="issue" data-hovercard-url="/kamailio/kamailio/issues/2718/hovercard" href="https://github.com/kamailio/kamailio/issues/2718">#2718</a><br>
REGISTER sip:voip.domain.com SIP/2.0.<br>
Via: SIP/2.0/UDP 32.1.128.4:45417;rport;branch=z9hG4bKPjZ5fpsipsncRX35bosd-juQhhswwf2n.t.<br>
Contact: sip:83@32.1.128.4:45417;ob.</p>
<p>TCP (Works) =<br>
T 2001:8004:13c0:5fed:dd64:812e:f2cd:8bf6:63053 -> fd00:db8:deca::4:5060 [AP] #4321<br>
REGISTER sip:voip.domain.com;transport=tcp SIP/2.0.<br>
Via: SIP/2.0/TCP [2001:8004:13c0:5fed:dd64:812e:f2cd:8bf6]:63053;rport;branch=z9hG4bKPjZyp0v51VSpi72vDLN0qA-rZBJv4FuMfG;alias.<br>
Contact: sip:83@[2001:8004:13c0:5fed:dd64:812e:f2cd:8bf6]:63053;transport=TCP;ob;reg-id=1;+sip.instance="urn:uuid:00000000-0000-0000-0000-0000f9855a1c".</p>
<p><a href="https://github.com/kamailio/kamailio/files/6555068/SIP.Capture.txt">SIP Capture.txt</a></p>

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