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How an Internet Site Blocker Works

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Patrick Smith
How an Internet Site Blocker Works

Despite an Internet site blocker having plenty of benefits, its operation is remarkably simple. A first line of defense automatically compares users´ requests to visit websites against blacklists of websites known to harbor malware and ransomware downloads, and also websites that have been used to execute phishing attacks. If a match is found, the request to visit that website is denied.


The second line of defense is more beneficial to companies, businesses and organizations trying to enhance productivity and prevent exposure to inappropriate material. In this line of defense, system administrators can choose which category of website (abortion, adult entertainment, alternative beliefs, alcohol, etc.), they would like to block access to. This is done with a single click of a mouse.


The third line of defense – keyword filters – serves the purpose of enhancing online security and fine-tuning the category filters to help ensure compliance with acceptable use policies. In this line of defense, access to websites and apps containing certain words can be blocked, as can downloads with the file extensions most commonly associated with malware (.exe, .rar, .scr, etc.).



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