<p>Hi,</p><p>I'm sure everyone is tired of NAT related questions, but I am really struggling here :(</p><div>I have freeswitch configured on an EC2 instance, with an elastic IP address. I've followed all of the NAT configuration instructions on the EC2 wiki (<a href="http://wiki.freeswitch.org/wiki/Amazon_ec2">http://wiki.freeswitch.org/wiki/Amazon_ec2</a>) and have researched widely on other possible solutions to no avail. Most scenarios work fine, but I'm having issue with one particular call path (see scenario 4 below). Firewall is correctly configured on the EC2 machine.</div>
<div><br>Scenario 1: x-lite to x-lite<br> - Both clients running behind firewall/NAT<br> - Voice path in both directions</div><p>Scenario 2: x-lite to PSTN<br> - x-lite running behind firewall/NAT<br> - PSTN is connected via SIP-trunk from Freeswitch to VoIPon ITSP<br>
- Voice path in both directions</p><p>Scenario 3: PSTN to PSTN<br> - Both endpoints connected via SIP-trunk (VoIPon ITSP) via Freeswitch<br> - Voice path in both directions</p><p>Scenario 4: PSTN to x-lite<br> - Exact reverse of scenario 2<br>
- Voice path one way (PSTN to x-lite)</p><div>Is there something obvious that would prevent this specific scenario from working? I've dumped a SIP trace for the fourth scenario onto pastebin...</div><div><a href="http://pastebin.com/dg1XqxsJ">http://pastebin.com/dg1XqxsJ</a></div>
<div> </div><div>I'd really appreciate some assistance and guidance!</div><div> </div><div>Kind regards,</div><div>Sara</div>