Question : Being "invisible" within A network.

Okay first of all here's what I have. Around 50 computers running off one server(which is connected to the internet), then off that several hubs, and even hubs running off of hubs. This is what I need: Need to isolate 5 computers for the rest of the network, these computers need to be able to share files with each other, but with no other computers. Also I need to hide the computer names on the network along with all the shared folders from these 5 computers.


Computers are running WinXP

Answer : Being "invisible" within A network.

Have you ever thought of something as simple as Zonealarm (a software firewall). You can just set the securities such that only the IP addresses you set in will see the computer. (one per computer)
If set up properly, this is a fairly simple little trick, plus it is shareware (basically free).

If you want a simple no money solution, I dont see why it wouldnt work.