<p dir="ltr">There's am entire chapter of the FreeSWITCH 1.2 book dedicated to NAT/PAT... it might be worth the investment for you to pick up a copy. The e version is pretty affordable and gets delivered very fast ;-)</p>
<p dir="ltr">-Ray</p>
<div class="gmail_quote">On Jun 3, 2013 4:40 PM, "Oleg Stolyar" <<a href="mailto:ostolyar@netflix.com">ostolyar@netflix.com</a>> wrote:<br type="attribution"><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
<div dir="ltr">Hi guys,<div><br></div><div>I ran into the following problem recently:</div><div><br></div><div>Using a softphone from a computer behind a NAT I register it with FreeSWITCH.</div><div>It registers with a certain port in the Contact header. FreeSWITCH stores this port in the user's registration info and uses it from then on to send messages to the phone.</div>
<div><br></div><div>However, for some reason FreeSWITCH initially sends back an "Unauthorized" response. After that some phones seem to send REGISTER again but with a<b> different port</b>.</div><div>
This only happen if the phone is behind a NAT. If FreeSWITCH is on the same network as the phone, the phone keeps the same port.</div><div><br></div><div>FreeSWITCH ignores that and keeps trying to contact the phone on the old port and of course fails.</div>
<div><br></div><div>Only some phones seem to change their port after registration. They include 3CXPhone, X-Lite.</div><div>Phones that don't do this are MicroSIP and Mizu.</div><div><br></div>
<div>I have a wireshark capture file of the session from the softphone machine if anyone would like, I'll be happy to email it or publish it.</div><div><br></div><div>So, I have three questions:</div>
<div>1. Why does FreeSWITCH initially send "Unauthorized" reply?</div><div>2. Does anyone know why some phones change their port during registration from behind a NAT? </div><div>3. Should I file a Jira ticket to have FreeSWITCH change UA's registered contact info when the UA sends a message with a different Contact header?</div>
<div><br></div><div><br clear="all"><div><div dir="ltr">Thank you<div><i><font color="#0000ff">Oleg</font></i></div></div></div>
</div></div>
<br>_________________________________________________________________________<br>
Professional FreeSWITCH Consulting Services:<br>
<a href="mailto:consulting@freeswitch.org">consulting@freeswitch.org</a><br>
<a href="http://www.freeswitchsolutions.com">http://www.freeswitchsolutions.com</a><br>
<br>
FreeSWITCH-powered IP PBX: The CudaTel Communication Server<br>
<a href="http://www.cudatel.com">http://www.cudatel.com</a><br>
<br>
Official FreeSWITCH Sites<br>
<a href="http://www.freeswitch.org">http://www.freeswitch.org</a><br>
<a href="http://wiki.freeswitch.org">http://wiki.freeswitch.org</a><br>
<a href="http://www.cluecon.com">http://www.cluecon.com</a><br>
<br>
FreeSWITCH-users mailing list<br>
<a href="mailto:FreeSWITCH-users@lists.freeswitch.org">FreeSWITCH-users@lists.freeswitch.org</a><br>
<a href="http://lists.freeswitch.org/mailman/listinfo/freeswitch-users">http://lists.freeswitch.org/mailman/listinfo/freeswitch-users</a><br>
UNSUBSCRIBE:<a href="http://lists.freeswitch.org/mailman/options/freeswitch-users">http://lists.freeswitch.org/mailman/options/freeswitch-users</a><br>
<a href="http://www.freeswitch.org">http://www.freeswitch.org</a><br>
<br></blockquote></div>