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<p>Hello,</p>
<p>you have to provide the PCAP (or ngrep output) for such a call
taken on kamailio system to see the headers of each sip message
and try to understand where the issue is.</p>
<p>Cheers,<br>
Daniel<br>
</p>
<div class="moz-cite-prefix">On 18.05.20 09:38, Rex Lin (林昱頡) wrote:<br>
</div>
<blockquote type="cite"
cite="mid:HK2PR04MB3732C647C86DE6951A29E9C582B80@HK2PR04MB3732.apcprd04.prod.outlook.com">
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style="font-size:12pt;"><a name="_MailEndCompose"
moz-do-not-send="true"></a>
<div><font size="2" face="Arial" color="#2F5496"><span
style="font-size:10.5pt;">Hi,</span></font></div>
<div><font size="2" face="Arial" color="#2F5496"><span
style="font-size:10.5pt;"> </span></font></div>
<div><font size="2" face="Arial" color="#2F5496"><span
style="font-size:10.5pt;">Do you need further
information? Actually, I am not sure if the process is
normal, there‘s no problem with the call at least.</span></font></div>
<div><font size="2" face="Arial" color="#2F5496"><span
style="font-size:10.5pt;">Could it be caused any problem
if all clients do fix_nated_register?</span></font></div>
<div><font size="3" color="#2F5496"><span
style="font-size:12pt;"> </span></font></div>
<div><font size="3" color="#1F497D"><span
style="font-size:12pt;"> </span></font></div>
<div><font size="2" face="Arial" color="#1F497D"><span
style="font-size:10.5pt;">Best Regards,</span></font></div>
<div><font size="2" face="Arial" color="#1F497D"><span
style="font-size:10.5pt;">Rex </span></font></div>
<div><font size="3" color="#2F5496"><span
style="font-size:12pt;"> </span></font></div>
<div><font size="2" face="Calibri"><span
style="font-size:11pt;"><b>From:</b> Rex Lin (<font
face="新細明體">林昱頡</font>)
<br>
<b>Sent:</b> Friday, May 15, 2020 2:37 PM<br>
<b>To:</b> Kamailio (SER) - Users Mailing List
<a class="moz-txt-link-rfc2396E" href="mailto:sr-users@lists.kamailio.org"><sr-users@lists.kamailio.org></a><br>
<b>Subject:</b> Re: [SR-Users] Issue of calls drop 32s</span></font></div>
<div><font size="3"><span style="font-size:12pt;"> </span></font></div>
<div><font size="3" face="Calibri"><span
style="font-size:12pt;">Hi Alex,</span></font></div>
<div><font size="3" face="Calibri"><span
style="font-size:12pt;"> </span></font></div>
<div><font size="3" face="Calibri"><span
style="font-size:12pt;">Thanks for your reply.</span></font></div>
<div><font size="3" face="Calibri"><span
style="font-size:12pt;">ICE/STUN haven’t been activated
by our clients. All transmission traffic pass through a
proxy server. Below is the screenshot of a normal call
process.</span></font></div>
<div><font size="3" face="Calibri"><span
style="font-size:12pt;"> </span></font></div>
<div><font size="3"><span style="font-size:12pt;"><img
src="cid:part2.DF12B831.ABF43F03@gmail.com" class=""><font
face="Calibri"> </font></span></font></div>
<div><font size="3"><span style="font-size:12pt;"> </span></font></div>
<div><font size="3"><span style="font-size:12pt;"> </span></font></div>
<div><font size="3" face="Calibri"><span
style="font-size:12pt;">Best Regards,</span></font></div>
<div><font size="3" face="Calibri"><span
style="font-size:12pt;">Rex</span></font></div>
<div><font size="3" face="Calibri"><span
style="font-size:12pt;"> </span></font></div>
<div><font size="3" face="Calibri"><span
style="font-size:12pt;">-----Original Message-----<br>
From: sr-users <<a
href="mailto:sr-users-bounces@lists.kamailio.org"
moz-do-not-send="true"><font color="#0563C1"><u>sr-users-bounces@lists.kamailio.org</u></font></a>>
On Behalf Of Alex Balashov<br>
Sent: Thursday, May 14, 2020 12:18 AM<br>
To: Kamailio (SER) - Users Mailing List <<a
href="mailto:sr-users@lists.kamailio.org"
moz-do-not-send="true"><font color="#0563C1"><u>sr-users@lists.kamailio.org</u></font></a>><br>
Subject: Re: [SR-Users] Issue of calls drop 32s</span></font></div>
<div><font size="3"><span style="font-size:12pt;"> </span></font></div>
<div><font size="3" face="Calibri"><span
style="font-size:12pt;">It's a tell-tale sign of an
end-to-end ACK from the caller not being forwarded
properly to the callee. The server should not be
forwarding such an ACK "to itself"; this suggests that
its Request
URI may be improperly constructed (it should be
equivalent to the remote Contact URI of the callee in
the 200 OK message), or that its Route headers are
somehow incorrect (they should mirror the Record-Route
set in the 200 OK).</span></font></div>
<div><font size="3" face="Calibri"><span
style="font-size:12pt;"> </span></font></div>
<div><font size="3" face="Calibri"><span
style="font-size:12pt;">-- Alex</span></font></div>
<div><font size="3" face="Calibri"><span
style="font-size:12pt;"> </span></font></div>
<div><font size="3" face="Calibri"><span
style="font-size:12pt;">On Wed, May 13, 2020 at
04:07:16PM +0000, Rex Lin (<font face="新細明體">林昱頡</font>)
wrote:</span></font></div>
<div><font size="3" face="Calibri"><span
style="font-size:12pt;"> </span></font></div>
<div><font size="3" face="Calibri"><span
style="font-size:12pt;">> Hi,</span></font></div>
<div><font size="3" face="Calibri"><span
style="font-size:12pt;">> </span></font></div>
<div><font size="3" face="Calibri"><span
style="font-size:12pt;">> </span></font></div>
<div><font size="3" face="Calibri"><span
style="font-size:12pt;">> It<font face="Courier New">’</font>s
weird that the calls always drop after 32s while the
callee is using public ip. Also, Server forwards ACK to
itself with UDP, instead of forwarding to callee
with TLS.</span></font></div>
<div><font size="3" face="Calibri"><span
style="font-size:12pt;">> </span></font></div>
<div><font size="3" face="Calibri"><span
style="font-size:12pt;">> </span></font></div>
<div><font size="3" face="Calibri"><span
style="font-size:12pt;">> Moreover, I cannot see <font
face="Courier New">“</font>Received<font face="Courier
New">”</font> in AOR as the callee finish the
registration.</span></font></div>
<div><font size="3" face="Calibri"><span
style="font-size:12pt;">> </span></font></div>
<div><font size="3" face="Calibri"><span
style="font-size:12pt;">> </span></font></div>
<div><font size="3" face="Calibri"><span
style="font-size:12pt;">> I recognized it<font
face="Courier New">’</font>s marked by nat_uac_test(<font
face="Courier New">“</font>19<font face="Courier New">”</font>)
and set with fix_nated_register(), the problem
can be resolved.</span></font></div>
<div><font size="3" face="Calibri"><span
style="font-size:12pt;">> </span></font></div>
<div><font size="3" face="Calibri"><span
style="font-size:12pt;">> </span></font></div>
<div><font size="3" face="Calibri"><span
style="font-size:12pt;">> My scenario is as below,
for your reference.</span></font></div>
<div><font size="3" face="Calibri"><span
style="font-size:12pt;">> </span></font></div>
<div><font size="3" face="Calibri"><span
style="font-size:12pt;">> 1.Kamailio version is
4.4.7, listening public ip.</span></font></div>
<div><font size="3" face="Calibri"><span
style="font-size:12pt;">> </span></font></div>
<div><font size="3" face="Calibri"><span
style="font-size:12pt;">> 2.Caller it<font
face="Courier New">’</font>s behind NAT.</span></font></div>
<div><font size="3" face="Calibri"><span
style="font-size:12pt;">> </span></font></div>
<div><font size="3" face="Calibri"><span
style="font-size:12pt;">> 3.Clients of Linphone.</span></font></div>
<div><font size="3" face="Calibri"><span
style="font-size:12pt;">> </span></font></div>
<div><font size="3" face="Calibri"><span
style="font-size:12pt;">> </span></font></div>
<div><font size="3" face="Calibri"><span
style="font-size:12pt;">> Do you know the reason why
it happened?</span></font></div>
<div><font size="3" face="Calibri"><span
style="font-size:12pt;">> </span></font></div>
<div><font size="3" face="Calibri"><span
style="font-size:12pt;">> </span></font></div>
<div><font size="3" face="Calibri"><span
style="font-size:12pt;">> </span></font></div>
<div><font size="3" face="Calibri"><span
style="font-size:12pt;">> Best Regards,</span></font></div>
<div><font size="3" face="Calibri"><span
style="font-size:12pt;">> </span></font></div>
<div><font size="3" face="Calibri"><span
style="font-size:12pt;">> Rex</span></font></div>
<div><font size="3" face="Calibri"><span
style="font-size:12pt;"> </span></font></div>
<div><font size="3" face="Calibri"><span
style="font-size:12pt;">>
_______________________________________________</span></font></div>
<div><font size="3" face="Calibri"><span
style="font-size:12pt;">> Kamailio (SER) - Users
Mailing List</span></font></div>
<div><font size="3" face="Calibri"><span
style="font-size:12pt;">> <a
href="mailto:sr-users@lists.kamailio.org"
moz-do-not-send="true">sr-users@lists.kamailio.org</a></span></font></div>
<div><font size="3" face="Calibri"><span
style="font-size:12pt;">> <a
href="https://lists.kamailio.org/cgi-bin/mailman/listinfo/sr-users"
moz-do-not-send="true">https://lists.kamailio.org/cgi-bin/mailman/listinfo/sr-users</a></span></font></div>
<div><font size="3"><span style="font-size:12pt;"> </span></font></div>
<div><font size="3"><span style="font-size:12pt;"> </span></font></div>
<div><font size="3" face="Calibri"><span
style="font-size:12pt;">--</span></font></div>
<div><font size="3" face="Calibri"><span
style="font-size:12pt;">Alex Balashov | Principal |
Evariste Systems LLC</span></font></div>
<div><font size="3" face="Calibri"><span
style="font-size:12pt;"> </span></font></div>
<div><font size="3" face="Calibri"><span
style="font-size:12pt;">Tel: +1-706-510-6800 /
+1-800-250-5920 (toll-free)</span></font></div>
<div><font size="3" face="Calibri"><span
style="font-size:12pt;">Web: <a
href="http://www.evaristesys.com/"
moz-do-not-send="true">http://www.evaristesys.com/</a>,
<a href="http://www.csrpswitch.com/"
moz-do-not-send="true">http://www.csrpswitch.com/</a></span></font></div>
<div><font size="3"><span style="font-size:12pt;"> </span></font></div>
<div><font size="3" face="Calibri"><span
style="font-size:12pt;">_______________________________________________</span></font></div>
<div><font size="3" face="Calibri"><span
style="font-size:12pt;">Kamailio (SER) - Users Mailing
List</span></font></div>
<div><font size="3"><span style="font-size:12pt;"><a
href="mailto:sr-users@lists.kamailio.org"
moz-do-not-send="true"><font face="Calibri">sr-users@lists.kamailio.org</font></a></span></font></div>
<div><font size="3"><span style="font-size:12pt;"><a
href="https://lists.kamailio.org/cgi-bin/mailman/listinfo/sr-users"
moz-do-not-send="true"><font face="Calibri">https://lists.kamailio.org/cgi-bin/mailman/listinfo/sr-users</font></a></span></font></div>
<div><font size="3"><span style="font-size:12pt;"> </span></font></div>
</span></font>
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<pre class="moz-quote-pre" wrap="">_______________________________________________
Kamailio (SER) - Users Mailing List
<a class="moz-txt-link-abbreviated" href="mailto:sr-users@lists.kamailio.org">sr-users@lists.kamailio.org</a>
<a class="moz-txt-link-freetext" href="https://lists.kamailio.org/cgi-bin/mailman/listinfo/sr-users">https://lists.kamailio.org/cgi-bin/mailman/listinfo/sr-users</a>
</pre>
</blockquote>
<pre class="moz-signature" cols="72">--
Daniel-Constantin Mierla -- <a class="moz-txt-link-abbreviated" href="http://www.asipto.com">www.asipto.com</a>
<a class="moz-txt-link-abbreviated" href="http://www.twitter.com/miconda">www.twitter.com/miconda</a> -- <a class="moz-txt-link-abbreviated" href="http://www.linkedin.com/in/miconda">www.linkedin.com/in/miconda</a>
Funding: <a class="moz-txt-link-freetext" href="https://www.paypal.me/dcmierla">https://www.paypal.me/dcmierla</a></pre>
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