So my setup is as follows: I have a main machine with 2 ethernet cards, one is plugged into my LAN, the other is plugged into a switch. I then have six client machines that are also plugged into the switch. What I need to do is allow the 6 clients and the main machine to be able to ping and ssh into each other. I also need to setup the main machine so that it can share its internet connection with the other 6 machines.
I would also like to keep the 6 client machines invisible from the building lan if that is possible.
I actually had this system working before (I didn't do the install) and we upgraded (clean install) all the computers from Feisty to Hardy, any help on where I can go to read about how to do this would be great, or a posted answer would be great as well.
I've been googling for "Internet Sharing Ubuntu", "Internet Sharing Hardy Heron" but I haven't been able to find anything that is really clear on how to accomplish what I want to do.
It seems easy enough to do I just haven't learned how to do it yet.