I had this same problem but eventually overcame it.  I modified the docs at <br><br><a href="http://wiki.freeswitch.org/wiki/Amazon_ec2">http://wiki.freeswitch.org/wiki/Amazon_ec2</a><br><br>accordingly.  I think the problem I had was the internal vs. external IP address, as you&#39;ve alluded to at the bottom of your message.  <br>
<br>In addition to the changes you&#39;ve made, I also modified sip_profiles/internal.xml - see the docs.<br><br>-larry<br><br><br><div class="gmail_quote">On Wed, May 6, 2009 at 9:20 PM, Dave Grootwassink <span dir="ltr">&lt;<a href="mailto:stackofstuff.dg@gmail.com">stackofstuff.dg@gmail.com</a>&gt;</span> wrote:<br>
<blockquote class="gmail_quote" style="border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;">








<div link="blue" vlink="purple" lang="EN-US">

<div>

<p>Hello all,</p>

<p> </p>

<p>Help a n00b out.    I have been trying to get
an instance of FreeSwitch running up in the Amazon EC2 cloud.   </p>

<p> </p>

<p>I have successfully gotten the package built following the
wiki and archives of this list.  </p>

<p> </p>

<p> I can get x-lite to register with the switch and it
will set up calls out on my asterlink account.  The problem is that there
is no audio transfer (so I am assuming RTP problem).</p>

<p> </p>

<p>The setup:</p>

<p> </p>

<p>Firewall open ports </p>

<p>tcp 0-65535</p>

<p>udp 0-65535        --- I
tried so many combinations unsuccessfully, I finally just blasted open
everything.</p>

<p> </p>

<p> </p>

<p>In conf/freeswitch.xml   (174.129.201.96  is
assigned elastic IP address)</p>

<p> </p>

<p>  &lt;X-PRE-PROCESS cmd=&quot;include&quot;
data=&quot;vars.xml&quot;/&gt;</p>

<p>  #set &quot;external_rtp_ip=174.129.201.96&quot; 
</p>

<p>  &lt;section name=&quot;configuration&quot; description=&quot;Various
Configuration&quot;&gt;</p>

<p>    &lt;X-PRE-PROCESS cmd=&quot;include&quot;
data=&quot;autoload_configs/*.xml&quot;/&gt;</p>

<p>  &lt;/section&gt;</p>

<p> </p>

<p> </p>

<p>In conf/autoload_configs/sofia.conf.xml</p>

<p>&lt;param name=&quot;ext-rtp-ip&quot;
value=&quot;$${external_rtp_ip}&quot;/&gt;</p>

<p>&lt;param name=&quot;ext-sip-ip&quot;
value=&quot;$${external_rtp_ip}&quot;/&gt;</p>

<p> </p>

<div style="border-style: none none solid; border-color: -moz-use-text-color -moz-use-text-color windowtext; border-width: medium medium 1pt; padding: 0in 0in 1pt;">

<p> </p>

<p>Internal network IP assignment:</p>

<p>Name:   domU-12-31-39-00-84-B6.compute-1.internal</p>

<p>Address: 10.254.139.68</p>

<p> </p>

</div>

<p> </p>

<p> </p>

<p>When I setup a call through asterlink, I see this in the
system log:</p>

<p> </p>

<p>Ring SDP:</p>

<p>v=0</p>

<p>o=FreeSWITCH 1241648830 1241648831 IN IP4 10.254.139.68</p>

<p>s=FreeSWITCH</p>

<p>c=IN IP4 10.254.139.68</p>

<p>t=0 0</p>

<p>m=audio 17654 RTP/AVP 0 101</p>

<p>a=rtpmap:0 PCMU/8000</p>

<p>a=rtpmap:101 telephone-event/8000</p>

<p>a=fmtp:101 0-16</p>

<p>a=silenceSupp:off - - - -</p>

<p>a=ptime:20</p>

<p>a=sendrecv</p>

<p> </p>

<p>I do not know SDP parameters off the top of my head, but I am
assuming that it is telling Asterlink to route the RTP to the internal network
IP address and not the external one.</p>

<p> </p>

<p> </p>

<p> </p>

<p> </p>

<p> </p>

</div>

</div>


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