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<font face="Courier New, Courier, monospace">Hello;<br>
<br>
When I was testing on NatHelper , i realized that Some Kind of
Softphones can use "received" param on Contact for <u>re-register
request. </u><br>
When re-registartion ,it uses received parameter IP on Contact
so that Kamailio cannot understand that it is Natted. <br>
Kamailio dont send Options request to keep open ports because
of not natted. So after a little time , Modem or Firewall close
opened ports and then UAC is unreachable!<br>
When i have a look ietf3261 , i couldnt find any thing this
flow. Do you have any idea about it?<br>
<br>
I am looking forward to your suggestions.<br>
<br>
Thanks.<br>
<br>
<br>
First Flow.<br>
-----------<br>
UAC sends Registration --->><br>
<br>
Contact : <a class="moz-txt-link-rfc2396E" href="mailto:sip:123456789@192.168.0.223:5060"><sip:123456789@192.168.0.223:5060></a><br>
<br>
<br>
Kamailio answer for register <<---200 OK<br>
<br>
Contact :
<a class="moz-txt-link-rfc2396E" href="mailto:sip:123456789@192.168.0.223:5060"><sip:123456789@192.168.0.223:5060></a>;received=195.8.8.10<br>
<br>
Second Flow<br>
------------<br>
UAC sends re-registartion --->> (Oh God there is a
received I must send registarion again!!)<br>
<br>
Contact : <a class="moz-txt-link-rfc2396E" href="mailto:sip:123456789@195.8.8.10:5060"><sip:123456789@195.8.8.10:5060></a><br>
<br>
Kamailio answer for register <<---200 OK (OK Bro! you
aren't Natted. No problem. I dont send Options)<br>
<br>
Contact : <a class="moz-txt-link-rfc2396E" href="mailto:sip:123456789@195.8.8.10:5060"><sip:123456789@195.8.8.10:5060></a></font>
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