Sorry for the delay, but here's where I stand.
I'm using Kubuntu, so I'm thinking that's why the stop/save/start commands for iptables didn't work, but I issued
iptables -t nat -A POSTROUTING -o eth0 -j MASQUERADE
So, on my client machines the DNS server is set up in /etc/resolv.conf, but prior to mentioning this it says, "Open your Windows / Mac / Linux computer networking GUI tool and point router IP to 192.168.1.254 (eth0 Linux IP)." In my situation, eth0 is to the router and eth1 is to a switch, and the static ip for eth1
(underlined to show I did change the above command) is 10.0.0.1.
How exactly would I point the router ip to, presumably, 10.0.0.1?