[Asterisk-Users] Calling IAX client behind NAT

[alexandre::aldeia digital]

Hi,

Sorry if this is a stupid question. Can I call a dynamic registered IAX 
  client localized behind a NAT ?


Client(Firefly,DIAX) --> NAT --> INTERNET --> * (public IP) --> SPA-2000
(192.168...)

The client can make calls to asterisk normally. But I can't call the 
client(lol...:). With a tunnel (VPN) this functions ok, but is to 
difficult to configuration by a simple user.
The great deal with IAX is the extreme facility to connect without any 
configuration. In FireFly, dial a URL iax://user:pass@domain is easy to 
explain and maintain.

Thanks,

Alexandre