<div dir="auto">Hi Andre,<div dir="auto"><br><div dir="auto">Some routers just simply won't support this double-nat scenario you describe. Othera will... And without any special forwarding. <div dir="auto"><br></div><div dir="auto">Is it possible to put the first router into "bridge" mode, and use the second router as the actual NAT router? </div><div dir="auto"><br></div><div dir="auto">This may be the quickest solution to your problems. Good luck! <br><br><div data-smartmail="gmail_signature" dir="auto">Thanks, Glenn (mobile)</div></div><br><div class="gmail_extra"><br><div class="gmail_quote">On Mar 11, 2017 8:50 AM, "Andre Gronwald" <<a href="mailto:andregronwald78@gmail.com">andregronwald78@gmail.com</a>> wrote:<br type="attribution"><blockquote class="quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">Hi all,<br>
<br>
I have a setup which is not working right now:<br>
<br>
Provider - DSL-Router (192.168.2.1) - Bintec-Router (10.17.46.66) - Asterisk (10.17.46.99)<br>
<br>
My issue: Everything works, but RTP is only going from my Asterisk towards the provider. Asterisk is configured to use SIP-ports 55060 and RTP-ports 51000-51999.<br>
Those ports are forwarded on DSL-router to the bintec router and from the bintec router to asterisk.<br>
<br>
what I see is the Invite from provider goes to 192.168.2.1 and rtp port 7070. my asterisk responds with audio to be sent to ip address 80.142.12.12 port 51242.<br>
Afterwards RTP goes from <a href="http://10.17.46.99:51242" rel="noreferrer" target="_blank">10.17.46.99:51242</a> to <a href="http://192.168.2.1:7070" rel="noreferrer" target="_blank">192.168.2.1:7070</a>. but the RTP back is not coming in.<br>
<br>
I would expect the RTP traffic to be sent to 80.142.12.12 (intetnal 192.168.2.1) port 51242 - then i would have successfully two way audio.<br>
But why is port 7070 used?<br>
<br>
The DSL-router is a speedport w724v type A.<br>
<br>
regards,<br>
andre<font color="#888888"><br>
<br>
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