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<body class='hmmessage'><div dir='ltr'>Notice that if you don't change Kamailio's basic config it will always RTP proxy for private IP addresses ( those specified on RFC-1918). If you are running your Kamailio server in a very low resource computer it can cause problems.<BR> <BR>To isolate where the problem is, I would recommend you disable the use of NAT and test your system using the same software client in both ends as most of the times this sound problem is related to software based codecs, CPU speed, bad wireless quality, etc. and this has nothing to do with your SIP registar.<br><BR><div><div id="SkyDrivePlaceholder">Moacir</div><hr id="stopSpelling">To: sr-users@lists.sip-router.org<br>From: mitan23@aol.com<br>Date: Sun, 3 Mar 2013 22:09:49 -0500<br>Subject: Re: [SR-Users] Kamailio problem with both clients in the same NAT<br><br><font color="black" size="2" face="arial">
<div style='border: 0px currentColor; line-height: 18px; clear: both; font-family: Arial, "Liberation Sans", "DejaVu Sans", sans-serif; font-size: 14px; vertical-align: baseline; word-wrap: break-word; background-color: rgb(255, 255, 255);'>Actually I've come far to this problem</div>
<div style='border: 0px currentColor; line-height: 18px; clear: both; font-family: Arial, "Liberation Sans", "DejaVu Sans", sans-serif; font-size: 14px; vertical-align: baseline; word-wrap: break-word; background-color: rgb(255, 255, 255);'>I have installed Kamailio as sip server/registrar and using default config. I have this situation: mobile cleint using IMSdroid (extension 100) windows client using Linphone (extension 300)</div>
<div style='border: 0px currentColor; line-height: 18px; clear: both; font-family: Arial, "Liberation Sans", "DejaVu Sans", sans-serif; font-size: 14px; vertical-align: baseline; word-wrap: break-word; background-color: rgb(255, 255, 255);'>Register satus: both clients register successfuly</div>
<div style='border: 0px currentColor; line-height: 18px; clear: both; font-family: Arial, "Liberation Sans", "DejaVu Sans", sans-serif; font-size: 14px; vertical-align: baseline; word-wrap: break-word; background-color: rgb(255, 255, 255);'>Both clients get connected to kamailio using my Wireless WIFI modem.</div>
<div style='border: 0px currentColor; line-height: 18px; clear: both; font-family: Arial, "Liberation Sans", "DejaVu Sans", sans-serif; font-size: 14px; vertical-align: baseline; word-wrap: break-word; background-color: rgb(255, 255, 255);'>I dial (from IMSdroid) to linphone: Both ring OK.</div>
<div style='border: 0px currentColor; line-height: 18px; clear: both; font-family: Arial, "Liberation Sans", "DejaVu Sans", sans-serif; font-size: 14px; vertical-align: baseline; word-wrap: break-word; background-color: rgb(255, 255, 255);'>Audio heard in IMSdroid is OK. Audio heard in windows linphone is just wind sound and jitter (or train sound, when I speak louder it gets louder)</div>
<div style='border: 0px currentColor; line-height: 18px; clear: both; font-family: Arial, "Liberation Sans", "DejaVu Sans", sans-serif; font-size: 14px; vertical-align: baseline; word-wrap: break-word; background-color: rgb(255, 255, 255);'>Video is ok in both sides (both clients show video clearly)</div>
<div style='border: 0px currentColor; line-height: 18px; clear: both; font-family: Arial, "Liberation Sans", "DejaVu Sans", sans-serif; font-size: 14px; vertical-align: baseline; word-wrap: break-word; background-color: rgb(255, 255, 255);'>Both clients get connected to kamailio (public internet IP)</div>
<div style='border: 0px currentColor; line-height: 18px; clear: both; font-family: Arial, "Liberation Sans", "DejaVu Sans", sans-serif; font-size: 14px; vertical-align: baseline; word-wrap: break-word; background-color: rgb(255, 255, 255);'>What the problem is from?</div>
<br>
<div style="clear: both;">Mitan Lopez<br>
mitan23@aol.com<br>
</div>
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<br>
<div style="color: black; font-family: arial,helvetica; font-size: 10pt;">-----Original Message-----<br>
From: Moacir Ferreira <moacirferreira@hotmail.com><br>
To: Kamailio Mail List <sr-users@lists.sip-router.org><br>
Sent: Sun, Mar 3, 2013 11:54 pm<br>
Subject: Re: [SR-Users] Kamailio problem with both clients in the same NAT<br>
<br>
<div id="ecxAOLMsgPart_2_563542f8-a575-40a7-8de1-a1f71f41aa73">
<div dir="ltr">The best way to understand all NAT variations -> <a href="http://en.wikipedia.org/wiki/Network_address_translation" target="_blank">http://en.wikipedia.org/wiki/Network_address_translation</a><br>
<br>
In there they explain:<br>
<br>
<strong>Symmetric NAT</strong><br>
<ul><li>Each request from the same internal IP address and port to a specific destination IP address and port is mapped to a unique external source IP address and port, if the same internal host sends a packet even with the same source address and port but to a different destination, a different mapping is used.</li><li>Only an external host that receives a packet from an internal host can send a packet back.<br>
</li></ul>
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<div id="ecxSkyDrivePlaceholder"></div>
<hr id="ecxstopSpelling">Date: Sun, 3 Mar 2013 23:05:46 +0700<br>
From: <a href="mailto:onmyway133@gmail.com">onmyway133@gmail.com</a><br>
To: <a href="mailto:sr-users@lists.sip-router.org">sr-users@lists.sip-router.org</a><br>
Subject: Re: [SR-Users] Kamailio problem with both clients in the same NAT<br>
<br>
<div dir="ltr">Is that symmetric NAT ?</div>
<div class="ecxgmail_extra"><br>
<br>
<div class="ecxgmail_quote">On Thu, Feb 28, 2013 at 6:46 PM, mohavere36 <span dir="ltr"><<a href="mailto:mohavere36@yahoo.com">mohavere36@yahoo.com</a>></span> wrote:<br>
<blockquote style="padding-left: 1ex; border-left-color: rgb(204, 204, 204); border-left-width: 1px; border-left-style: solid;" class="ecxgmail_quote">
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hi, I'm struggling for 2 days to make a config file for kamailio in
a situation where clients arein the same nat but kamailio has public
IP, one way audio problem, does any one have a solution for it?<br>
<br>
</div>
<br>
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</blockquote></div>
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-- <br>
<span style="color: rgb(0, 0, 0);">Khoa Pham</span><br style="color: rgb(0, 0, 0);"><span style="color: rgb(0, 0, 0);">HCMC University of Science</span><br style="color: rgb(0, 0, 0);">
<span style="color: rgb(0, 0, 0);">Faculty of Information Technology</span><br>
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<pre style="font-size: 9pt;"><tt>_______________________________________________
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</tt></pre>
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