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Purchase and install a Linksys WRT54GS.

Visit http://192.168.1.1/Manage.htm :

• Enter password twice, Save Settings.

Visit http://192.168.1.1/basic.htm :

• Select your Time Zone.  Click Save Settings.

Ensure that each machine upon which you want to impose a curfew has requested a new DHCP address:

ipconfig /renew

Visit http://192.168.1.1/DHCPTable.htm :

• Copy/paste each MAC Address to a Tomboy note or inferior equivalent.

Visit http://192.168.1.1/Filters.htm :

• In Enter Policy Name enter nightynight.

• Click Enable and Deny.  Unclick Everyday.  Click Sun, Mon, Tue, Wed, Thu.  Unclick 24 hours.  Make From be 10:00 PM.  Make To be 11:55 PM.

• Click Edit List of PCs.  Copy the MAC Addresses you previously saved here.  Save Settings Save Settings.

• Click Continue.

Still in http://192.168.1.1/Filters.htm :

• In Internet Access Policy, select 2() from the dropdown box.  Repeat above step, substituting sleeptight for the Policy Name, Fri for Sun, 0:00 AM for the From and 5:00 AM for the To.

• After you do to the Continue step, click Summary.  Compare your results to the table below.