I need to setup our Watchguard (X1000, Fireware v8.2.1) to redirect traffic from a specific external host via an unused external IP address from our ISP, to an internal server, limited to a single port.
In a little more detail I need an external server to communicate directly with an internal server. The external server will initiate the communication. The communication will only use a single, known port. I'd like to use one of our external IP addresses from our ISP that is not currently in use.
So the firewall rule will look something like
From: External Host
To: Our External Unused IP, redirected to an Internal Host
On Port: xxx
I'm sure this should be fairly straightforward, but the actual configuration steps are defeating me at the moment. Can anyone help please.