My suggestion is that a map is put in place containing ALL IP addresses with lines linking them depending on where they are conected to. You can only view your connected network.
For you to be able to see this map you require software called IP spider, IP Spider Block obviously is the anti-version. the IP spider has to be v1.06 higher than the IP Spider Block to view.
The map is updated every time you click on the map button and takes 10 seconds to map one computer, the discovered computers show up instantaneously.
Another Idea that could go nicely to this is friend and foe lists. If the discovered computer is a friend it shows up green, if its a foe it shows up red. If its an NPC server it shows up with the designated faction colour with either a P for public or a S for secret in it.
Secret servers AUTOMATICALLY have IP Spider Blocker installed and depending on server strength depends on the version.
Key