For example, let's say we use NAT to allow incoming Remote Desktop port 3389 (again, just an example) and we want to restrict access so that only specific WAN ip addresses can connect on that port. Other routers, such as Netgear FVS338 allow the choice of either a single ip address, or range of ip addresses to have inbound access, per each defined port. Some routers even go so far as to allow a whilelist of ip addresses.

I assumed that this feature was missing from the Vigor 2920n, but perhaps I just can't find it. Is it possible to do this?