Hypothetically...
I have a DSL connection to the World. A hub is plugged into it, and 2-6 computers into the hub. Naturally, the computers have a class C (?) between them, which should not be routable from the World. The computers have their own connection to the World through the hub and DSL. I think the whole thing is a star topology, at least for the internal network.
Is what I have described above correct, and possible? I suppose ideally, one of the Linux boxen would get the DSL line and act as firewall to the rest through the hub?
Now... whichever way, how do I do it on Linux? ipchains alone is enough?