Watchguard firewall NAT

[raldridge]

Anyone using a WatchGuard firewall and can help with the correct NAT configuration to get the 3CX firewall test to pass? I'm been playing with the 1:1 NAT as described here but with no luck:

http://www.corecom.com/external/livesecurity/1to1nat.htm

I'm running the release version 6.

Thanks