[asterisk-users] Digium AIX demo nogo (was: NAT solutions)

[Yuan LIU]

>From: Tim Panton <tim at mexuar.com>
>>Thanks for this information.  Does this mean two IAX boxes can talk  
>>behind their respective NAT's (without any server sitting in voice  path)? 
>>  I'm imagining this:
>>
>>Asterisk1 <--> NAT1 --- { Internet } --- NAT2 <--> Asterisk2
>>
>>If Asterisk1 can talk to Asterisk2 at trunk level, I'll be happy.
>
>Yes, with 1 proviso - one end needs a known IP address and a port map
>for udp 4569 in the router. The other can simply register to it with  zero
>router config.
>
>Tim Panton
>
>www.mexuar.net
>www.westhawk.co.uk/

Unrelated to dual firewalls - I just tried Asterisk Demo included in sample 
configs.  Priority 2 in extension 500 is
  Dial(IAX2/guest at misery.digium.com/s at default)
But the result is nogo:
    -- Executing [500 at default:2] Dial("Zap/1-1", 
"IAX2/guest at misery.digium.com/s at default") in new stack
    -- Called guest at misery.digium.com/s at default
[Jan 26 22:58:13] NOTICE[25383]: chan_iax2.c:2686 __auto_congest: 
Auto-congesting call due to slow response
    -- IAX2/216.207.245.8:4569-1 is circuit-busy
    -- Hungup 'IAX2/216.207.245.8:4569-1'
  == Everyone is busy/congested at this time (1:0/1/0)

I am behind a NAT that one SIP provider has no problem penetrating (no port 
forwarding).  I then opened 4569 to my Asterisk.  Still no go.

Thank you for suggestions.

Yuan Liu