Hi BrookeB,
Here are our recommendations, there is no way to block him if he is hardwired into the modem. You could probably take the ethernet cords from him so that he does not have the capability to hardwire. At the end of the night, before you go to bed, you can always remove the power cord to the modem and keep it with you while you sleep and replace it in the morning. Yes you do have to configure every allowed MAC address and change the setting to "Allow." If you have downloaded the Panoramic Wifi app you can pause any device on the internet. You can change the Wifi user name and password and do not tell him.
Crystal S.
Cox Support Forum Moderator
