OK - so here's my setup for confirmation:
ZyXel Router External Public IP: DCHP Allocated by ISP
Router LAN Trusted: static network address supplied by ISP
NAT Disabled
Firewall Disabled
WatchGuard Firewall External: One of the 5 static IP's from my allocation:
Firewall Trusted: 192.168.x.x.
You can read a bit more about this as I
posted on the subject a while back.
So as NAT is disabled, should I then use one of my block of 5 IPs for the LAN interface on the NAS making it an external device? Obviously I'd need to change the A record to point to the new IP.
Would I still be able to access the device internaly without going out then back in?