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Hello,<br>
<br>
for nat trversal, I suggest you use the default kamailio.cfg from
later versions 3.3.x or upcoming 4.0. Read the comments at the top
of the file -- practically the routing logic for nat traversal is
surrounded by WITH_NAT define.<br>
<br>
o= line is not used for rtp relaying, but some clients expect to be
the same as c=, at that moment it should be rewritten (or better
rewrite it always to be sure that is not the reason of some no-audio
problem).<br>
<br>
Cheers,<br>
Daniel<br>
<br>
<div class="moz-cite-prefix">On 3/1/13 12:47 PM, Khoa Pham wrote:<br>
</div>
<blockquote
cite="mid:CAN+NExGRhh56A92STxfjd=Lwh+Do=UoiEi+wW=L1hLsL=VwRgQ@mail.gmail.com"
type="cite">
<div dir="ltr">Hi, I mistype. What I want to know is what affects
Kamailio decision in rewriting c= in SDP.
<div><br>
</div>
<div style="">In <a moz-do-not-send="true"
href="http://kamailio.org/docs/ser-getting-started/SER-GettingStarted.pdf">http://kamailio.org/docs/ser-getting-started/SER-GettingStarted.pdf</a>,
I see that </div>
<div style=""><br>
</div>
<div style="">
<div> if (isflagset(6)) {</div>
<div> force_rport();</div>
<div> fix_nated_contact();</div>
<div> force_rtp_proxy();</div>
<div> }</div>
<div><br>
</div>
<div style="">Which means that Kamalio only cares if the
caller is behind NAT or not.</div>
<div style=""><br>
</div>
<div style="">Does it care about caller's symmetric NAT, using
STUN, callee's nat type ?</div>
</div>
</div>
<div class="gmail_extra"><br>
<br>
<div class="gmail_quote">On Fri, Mar 1, 2013 at 10:38 AM, Khoa
Pham <span dir="ltr"><<a moz-do-not-send="true"
href="mailto:onmyway133@gmail.com" target="_blank">onmyway133@gmail.com</a>></span>
wrote:<br>
<blockquote class="gmail_quote" style="margin:0 0 0
.8ex;border-left:1px #ccc solid;padding-left:1ex">
<div dir="ltr">Hi, I read in <a moz-do-not-send="true"
href="http://kamailio.org/docs/modules/1.4.x/nathelper.html"
target="_blank">http://kamailio.org/docs/modules/1.4.x/nathelper.html</a>
that Kamailio might rewrite ip address in o= in SDP to
facilitate NAT traversal.
<div>
<br>
</div>
<div>It may decide to use to original IP or use IP of RTP
server. What factors affect its decision ?<span
class="HOEnZb"><font color="#888888"><br clear="all">
<div><br>
</div>
-- <br>
<span style="">Khoa Pham</span><br style="">
<span style="">HCMC University of Science</span><br
style="">
<span style="">Faculty of Information Technology</span><br>
</font></span></div>
</div>
</blockquote>
</div>
<br>
<br clear="all">
<div><br>
</div>
-- <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>
</div>
<br>
<fieldset class="mimeAttachmentHeader"></fieldset>
<br>
<pre wrap="">_______________________________________________
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</pre>
</blockquote>
<br>
<pre class="moz-signature" cols="72">--
Daniel-Constantin Mierla - <a class="moz-txt-link-freetext" href="http://www.asipto.com">http://www.asipto.com</a>
<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, April 16-17, 2013, Berlin
- <a class="moz-txt-link-freetext" href="http://conference.kamailio.com">http://conference.kamailio.com</a> -</pre>
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