Using an MR600 device as a wireless router, I've been able to use a virtual server to access a service inside my LAN from the external internet.
However, I do not want public access i.e. I would like to restrict access to the particular open port to a few trusted external hosts.
I've read the manual several times and have many years experience configuring networks but I cannot see anywhere where I can add particular rules which restrict access to particular external hosts. For example, the Advanced / Security / Firewall setting is "on" but there's no provision for adding additional rules. Every router I've used for many yearts has allowed external access to be restricted to specific hosts.
Would you be so kind as to explain how I can restrict access to a virtual server to specific external hosts?