[asterisk-users] Cisco 7960 Double Natted
stotaro at asteriskhelpdesk.com
Sat Sep 23 05:32:25 MST 2006
Barry Fawthrop wrote:
> Hi All
> Yes I know double Nat is a problem
> But I have a Cisco 7960 which is remote from the * PBX ad connected
> via the Internet. Each side has NAT
> (1) Sometimes it will work often it won't. And when it decides to work
> is random
> (2) The Register side works fine. SIP SHOW PEERS has the phone listed
> with the correct IP address and an average Qualify time (121 ms)
> (3) You can make calls outbound with the Cisco phone through the * PBX
> (4) You can not receive any calls (when not working correctly)
> (a) The Phone rings but not voice goes through
> (b) Sometimes get a 481 "Call Leg Does Not Exist"
> (c) Sometimes get a -- is circuit-busy
> (5) On a reload of the * box you will 95 % sure loose the connection
> if it was working ?
> (6) SIP 5060 - 5063 and RTP 10000 - 25000 is open and port
> forwarded on both sides
> (7) All calls are VoIP and terminate or originate via a VoIP Provider
> Anybody got any ideas, I have tried everything
> Thanks All
You could try giving up and not wasting anymore time. At least that was
my experience after spending MANY hours working on a solution.
Well I came up with a solution, and it was to remove the double NAT, at
least to layer 3 of the stack. OpenVPN saved the day.
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