Apple Version 3 manual How NetPurifier Works, Overview, Filtering System

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How NetPurifier Works

Overview

NetPurifier is a hardware-and-software, set-it-and-forget-it device that plugs into your network and redirects all Internet traffic to itself. Only the NetPurifier communicates directly with the Internet. Internet information for all other computers (e.g., Windows, Apple, Linux) must first go through the filter system built into the NetPurifier.

Filtering System

A three-tier filter system ensures that inappropriate content does not reach the user.

First, NetPurifier compares the site with its blacklist to determine if the address has already been deemed inappropriate.

The product then looks at the site rating, searching for the industry-standard rating tags.

Finally, NetPurifier scans every word on the Internet page looking for words that indicate inappropriate content. The context of these words is then analyzed to determine if the page should be blocked. This greatly reduces the number of false positives while blocking those pages that are offensive. This feature accounts for NetPurifier’s remarkable accuracy.

If the content passes through all three filters, NetPurifier allows the page to be loaded on the user’s computer. If any of the filters fail, an “Access Denied” page is sent to the user’s computer. All this is done in a fraction of a second, with no delay seen by the user.

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