[CLUE-Tech] Trying to set up a NAT/Firewall system for a home network: can't ping Internet

[bof]

I am trying to set up a system to act as a firewall/NAT router. I've 
installed KRUD 7.2 in it, along with two NIC's.

One NIC (eth1, address 192.168.1.1) is for my private network, 
192.168.1.x, and the other (eth0) uses DHCP to garner an address from my 
ISP. I've got them set up to do so and they work as they should. I can 
ping out from this machine, and can also ping into my 192.168.1.x 
network to the systems on it.

But I can't ping out of the machines on the 192.168.1.x network to get 
to the Internet. I am not running (yet) any firewall on either system.

Is this a problem in my routing tables and gateways? I've never really 
understood this gateway stuff, so if someone could take a line to two to 
explain it, it would be nice.

And if the routing table is not the solution, could someone please help 
there?

BOF