[Ham-Computers] Access question

[Gene WØQFC]

I have a slight poroblem that perhaps others might have and that is to restrict internet access to my young stepson. (He stays up half the night playing games and then is usually late for work because he can not wake up in time!)

I am using WIN XP PRO on my computer (The "server"), high speed cable modem and a Linksys BEFSX41 cable router and a Netgear 8 port hub.

He has WIN ME on his.

I can limit his access with the Linksys router by using his computers IP address and setting the time(s) in the Linksys router setup.

HOWEVER, he has a XBOX and removes the CAT5 cable from his computer and plugs it into the XBOX. Here in lies the problem: how do I know what 'IP' address the XBOX uses?

I am unable to just shut off the power to the cable modem because he will sneak into my shack and turn it back on, so I must resort to limiting his access; the Linksys router can be protected with a password, so he can not go into the setup and change anything.

I would really appreciate any help that the list members might provide.

Gene, WØQFC