Utstar what is the model ?
Router what is the model /make ?Easy method pull out the LAN Rj45 cable/s from the router !!!! Now LAN gone !If you plan to stop access to certain website/s , it has to be done at the computer/s end See IE internet options and block the site/s you don't want others in the LAN set up to access As Administrator block access to IE/YM/OE. in the computer