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<tt>Hi,<br>
<br>
There was a similar email couple of days ago - the idea is to do
fix_nated_contact() for all the traffic (replies and requests)
coming from the WS(S) end point (as such endpoints are not able to
provide a routable contact)<br>
<br>
Regards,<br>
</tt>
<pre class="moz-signature" cols="72">Bogdan-Andrei Iancu
OpenSIPS Founder and Developer
<a class="moz-txt-link-freetext" href="https://www.opensips-solutions.com">https://www.opensips-solutions.com</a>
OpenSIPS Summit 2019
<a class="moz-txt-link-freetext" href="https://www.opensips.org/events/Summit-2019Amsterdam/">https://www.opensips.org/events/Summit-2019Amsterdam/</a>
</pre>
<div class="moz-cite-prefix">On 06/12/2019 12:08 PM, Callum Guy
wrote:<br>
</div>
<blockquote type="cite"
cite="mid:CAFjCFzmdZvQZn8i_TdFgnfLwZTFAWZ4AhzZFLZb29ZLGkiNHKw@mail.gmail.com">
<div dir="ltr">Hi All,<br>
<div><br>
</div>
<div>I am in the process of configuring a WebRTC/SIP proxy and
wanted to know if there was any way to prevent OpenSIPs from
attempting to resolve the .invalid domains present in the Via
headers:</div>
<div><font face="courier new, monospace"><br>
</font></div>
<div><font face="courier new, monospace">INVITE <a
href="mailto:sip%3Aabc@us.net" moz-do-not-send="true">sip:abc@us.net</a>
SIP/2.0<br>
Via: SIP/2.0/WSS b7evbq9f9q22.invalid;branch=z9hG4bK5495466</font><br>
</div>
<div><br>
</div>
<div>Although all is working I'm seeing the following log
message.</div>
<div><br>
</div>
<div><font face="courier new, monospace">CRITICAL:core:mk_proxy:
could not resolve hostname: "</font><span
style="font-family:"courier new",monospace">b7evbq9f9q22</span><font
face="courier new, monospace">.invalid"</font><br>
</div>
<div><br>
</div>
<div>Certainly it seems that this is compliant with the RFC
defined behaviour (<a
href="https://tools.ietf.org/html/rfc7118#appendix-B.1"
moz-do-not-send="true">https://tools.ietf.org/html/rfc7118#appendix-B.1</a>)
however I am hoping there is a simple way to block lookups to
this domain to save resources etc.</div>
<div><br>
</div>
<div>On a side note I am typically reviewing SIP on our network
using sngrep, when relaying these messages over UDP sngrep is
failing to read the packets (presumably due to the extremely
large SDP failing reassembly). While I'm writing I wondered if
anyone has seen this before and could offer advice - the
target endpoint (FreeSWITCH) has no issues reading it. One
workaround could be to use TCP (tested and works) however I
was curious if there was another solution?</div>
<div><br>
</div>
<div>Thanks,</div>
<div><br>
</div>
<div>Callum</div>
<div><br>
</div>
</div>
<br>
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