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
Always
(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)
Always
(3) You can make calls outbound with the Cisco phone through the * PBX
Problem
(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
Barry
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.
Thanks,
Steve Totaro
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