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<p class="MsoNormal"><span style="color:#1F497D">Hello Daniel,<o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="color:#1F497D">Thank you! Setting the mhomed parameter fixed it!<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="color:#1F497D">Regards,<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="color:#1F497D">Grant<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="color:#1F497D"><o:p> </o:p></span></p>
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<p class="MsoNormal"><b><span lang="EN-US" style="color:windowtext;mso-fareast-language:NL">From:</span></b><span lang="EN-US" style="color:windowtext;mso-fareast-language:NL"> sr-users [mailto:sr-users-bounces@lists.sip-router.org]
<b>On Behalf Of </b>Daniel-Constantin Mierla<br>
<b>Sent:</b> Wednesday, May 6, 2015 3:43 PM<br>
<b>To:</b> Kamailio (SER) - Users Mailing List<br>
<b>Subject:</b> Re: [SR-Users] Strange behavior for TCP and UDP SIP Routing<o:p></o:p></span></p>
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<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal" style="margin-bottom:12.0pt">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<span style="font-size:12.0pt;mso-fareast-language:NL"><o:p></o:p></span></p>
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<p class="MsoNormal">On 06/05/15 15:26, Grant Bagdasarian wrote:<o:p></o:p></p>
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<p class="MsoNormal"><span lang="EN-US">Hello,</span><o:p></o:p></p>
<p class="MsoNormal"><span lang="EN-US"> </span><o:p></o:p></p>
<p class="MsoNormal"><span lang="EN-US">I have a Kamailio machine configured with two interfaces. One public, one private.
</span><o:p></o:p></p>
<p class="MsoNormal"><span lang="EN-US">Public Address: 10.10.10.10</span><o:p></o:p></p>
<p class="MsoNormal"><span lang="EN-US">Private Address: 192.168.1.10</span><o:p></o:p></p>
<p class="MsoNormal"><span lang="EN-US"> </span><o:p></o:p></p>
<p class="MsoNormal"><span lang="EN-US">Kamailio forwards the SIP packet to another local endpoint: 192.168.1.20</span><o:p></o:p></p>
<p class="MsoNormal"><span lang="EN-US"> </span><o:p></o:p></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.</span><o:p></o:p></p>
<p class="MsoNormal"><span lang="EN-US">TCP: Client -> 10.10.10.10 -> 192.168.1.10 -> 192.18.1.20</span><o:p></o:p></p>
<p class="MsoNormal"><span lang="EN-US"> </span><o:p></o:p></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.</span><o:p></o:p></p>
<p class="MsoNormal"><span lang="EN-US">UDP: Client -> 10.10.10.10 -> 10.10.10.10 -> 192.18.1.20</span><o:p></o:p></p>
<p class="MsoNormal"><span lang="EN-US"> </span><o:p></o:p></p>
<p class="MsoNormal"><span lang="EN-US">In the case of TCP, the source address is 192.168.1.10.
</span><o:p></o:p></p>
<p class="MsoNormal"><span lang="EN-US">In the case of UDP, the source address is 10.10.10.10.</span><o:p></o:p></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)</span><o:p></o:p></p>
<p class="MsoNormal"><span lang="EN-US"> </span><o:p></o:p></p>
<p class="MsoNormal"><span lang="EN-US">Is this normal? What is causing this, the OS or Kamailio?</span><o:p></o:p></p>
<p class="MsoNormal"><span lang="EN-US"> </span><o:p></o:p></p>
<p class="MsoNormal"><span lang="EN-US">Route[RELAY] {</span><o:p></o:p></p>
<p class="MsoNormal"><span lang="EN-US"> …</span><o:p></o:p></p>
<p class="MsoNormal"><span lang="EN-US"> </span><o:p></o:p></p>
<p class="MsoNormal"><span lang="EN-US"> if($pr =~ "TCP") {</span><o:p></o:p></p>
<p class="MsoNormal"><span lang="EN-US"> if (!t_relay_to_tcp()) {</span><o:p></o:p></p>
<p class="MsoNormal"><span lang="EN-US"> sl_reply_error();</span><o:p></o:p></p>
<p class="MsoNormal"><span lang="EN-US"> }</span><o:p></o:p></p>
<p class="MsoNormal"><span lang="EN-US"> } else {</span><o:p></o:p></p>
<p class="MsoNormal"><span lang="EN-US"> if (!t_relay_to_udp()) {</span><o:p></o:p></p>
<p class="MsoNormal"><span lang="EN-US"> sl_reply_error();</span><o:p></o:p></p>
<p class="MsoNormal"><span lang="EN-US"> }</span><o:p></o:p></p>
<p class="MsoNormal"><span lang="EN-US"> }</span><o:p></o:p></p>
<p class="MsoNormal"><span lang="EN-US">}</span><o:p></o:p></p>
<p class="MsoNormal"><span lang="EN-US"> </span><o:p></o:p></p>
<p class="MsoNormal"><span style="font-size:12.0pt;font-family:"Times New Roman",serif;mso-fareast-language:NL"><br>
<br>
<br>
<o:p></o:p></span></p>
<pre>_______________________________________________<o:p></o:p></pre>
<pre>SIP Express Router (SER) and Kamailio (OpenSER) - sr-users mailing list<o:p></o:p></pre>
<pre><a href="mailto:sr-users@lists.sip-router.org">sr-users@lists.sip-router.org</a><o:p></o:p></pre>
<pre><a href="http://lists.sip-router.org/cgi-bin/mailman/listinfo/sr-users">http://lists.sip-router.org/cgi-bin/mailman/listinfo/sr-users</a><o:p></o:p></pre>
</blockquote>
<p class="MsoNormal"><span style="font-size:12.0pt;font-family:"Times New Roman",serif;mso-fareast-language:NL"><br>
<br>
<o:p></o:p></span></p>
<pre>-- <o:p></o:p></pre>
<pre>Daniel-Constantin Mierla<o:p></o:p></pre>
<pre><a href="http://twitter.com/#!/miconda">http://twitter.com/#!/miconda</a> - <a href="http://www.linkedin.com/in/miconda">http://www.linkedin.com/in/miconda</a><o:p></o:p></pre>
<pre>Kamailio World Conference, May 27-29, 2015<o:p></o:p></pre>
<pre>Berlin, Germany - <a href="http://www.kamailioworld.com">http://www.kamailioworld.com</a><o:p></o:p></pre>
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