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Hello,<br>
<br>
do you have forwarding rules on your IP routing tables between the
two interfaces? Have you enabled the mhomed global parameter?<br>
<br>
For UDP, the default rule is to use incoming socket for sending the
packets, unless mhomed is enabled. <br>
<br>
For TCP is the kernel that has the final decision on the connection.<br>
<br>
Note that you can also force a specific inteface with
force_send_socket() or $fs= "...".<br>
<br>
Cheers,<br>
Daniel<br>
<br>
<div class="moz-cite-prefix">On 06/05/15 15:26, Grant Bagdasarian
wrote:<br>
</div>
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<p class="MsoNormal"><span lang="EN-US">Hello,<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">I have a Kamailio
machine configured with two interfaces. One public, one
private.
<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">Public Address:
10.10.10.10<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">Private Address:
192.168.1.10<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">Kamailio forwards the
SIP packet to another local endpoint: 192.168.1.20<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">When a client sends a
SIP packet using TCP to the public address of Kamailio,
Kamailio relays the packet using its private interface
(private address) to the other endpoint.<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">TCP: Client ->
10.10.10.10 -> 192.168.1.10 -> 192.18.1.20<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">When a client sends a
SIP packet using UDP to the public address of Kamailio,
Kamailio (or the OS) relays the packet using its public
interface (public address) to the other endpoint.<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">UDP: Client ->
10.10.10.10 -> 10.10.10.10 -> 192.18.1.20<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">In the case of TCP, the
source address is 192.168.1.10.
<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">In the case of UDP, the
source address is 10.10.10.10.<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">Everything is the same
in the routing script for both UDP and TCP, except in
route[relay] (see below)<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">Is this normal? What is
causing this, the OS or Kamailio?<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">Route[RELAY] {<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"> …<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"> if($pr
=~ "TCP") {<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">
if (!t_relay_to_tcp()) {<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">
sl_reply_error();<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">
}<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"> } else {<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">
if (!t_relay_to_udp()) {<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">
sl_reply_error();<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">
}<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"> }<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">}<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
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<pre wrap="">_______________________________________________
SIP Express Router (SER) and Kamailio (OpenSER) - sr-users mailing list
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<br>
<pre class="moz-signature" cols="72">--
Daniel-Constantin Mierla
<a class="moz-txt-link-freetext" href="http://twitter.com/#!/miconda">http://twitter.com/#!/miconda</a> - <a class="moz-txt-link-freetext" href="http://www.linkedin.com/in/miconda">http://www.linkedin.com/in/miconda</a>
Kamailio World Conference, May 27-29, 2015
Berlin, Germany - <a class="moz-txt-link-freetext" href="http://www.kamailioworld.com">http://www.kamailioworld.com</a></pre>
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