[Keefe]

Okay, right after I made that post I had an epiphany.

If you hook your cable modem into the uplink port of your modem you will no longer be going through the router for internet. This means that your computer will get an external IP address from the cable modem instead of an internal IP address from your router. Most cable internet providors only allow 1-4 external IP's per customer, you would have to check with your providor about that. Just remember that if you have more computers than IPs allowed some will not be able to get online if you hook the cable modem to the uplink port.

That gaming software must not work so well through the firewall built into those routers. I would check into the documentation for that software and see if they have and How-to's for setting it up with a firewall. You will most likely need to setup port forwarding to get it to work through the firewall. Port forwarding is a much better solution that exposing yourself direcltly to the open internet.