[Asterisk-Users] Register Asterisk to FWD via SIP

[Joseph]

As described in: With NAT between Asterisk and FWD
http://www.voip-info.org/wiki/view/Asterisk+How+to+connect+to+FWD

Apparently it doesn't work, but I think the instruction is not complete.
Is there a way do defined  "Outbound Proxy" for FWD in sip.conf ???

Why do I need port forward 5060 and 10000 - 20000 to asterisk box? 
When I setup Sipura behind NAT (using NAT and proxy setting) and
register it to FWD it works perfectly (better voice connection as well
than IAX with FWD)  and I do not need to setup any port forwarding in my
firewall.

So why isn't it possible to register SIP to FWD from behind NAT using
similar configuration.

Not to mention in SIP Tab (on sipura), most NAT Support Parameters are
turned ON. 

-- 
#Joseph