[Asterisk-Users] Sipura Behind NAT howto

[Jean-Michel Hiver]

I am trying to get a SPA-3000 to work behind NAT - for the sake of the 
exercice.

The SPA is on the local network at the address 192.168.0.125 behind a 
NATted linux router.

The machine I am trying to work with is a friend's (let's call it 
lolo.dyndns.org) and I've installed Asterisk 1.0.3 on it.

I can see the SPA register but when I try to make an outbound call I get 
the message:

Jan 24 14:35:03 NOTICE[3184]: chan_sip.c:7295 handle_request: Unable to 
create/find channel
Jan 24 14:35:03 NOTICE[3184]: chan_sip.c:7295 handle_request: Unable to 
create/find channel
Jan 24 14:35:04 NOTICE[3184]: chan_sip.c:7295 handle_request: Unable to 
create/find channel

Also, when I comment out the 'secret=' line from sip.conf, everything 
seems to work just fine...

Any ideas what's going on?

Cheers,
Jean-Michel.