1. A method of controlling user access to Internet sites between a local area network and an Internet, comprising: determining within a central device of a local area network a content category of each Internet site that a user is accessing, said Internet site being previously associated with said content category based upon a comparison between a total page relevancy score and an alpha score, the total page relevancy score being defined at least in part by a relevancy score for a word pair from said Internet site to said content category; providing a timer; and blocking said user from accessing Internet sites in said content category when said timer reaches a predetermined level.