Quick Summary of How it Works

• The client enters the URL into their browser and the request is sent off to the NetSentron®.
• The header is then checked for the following: user name, malformed URL, source IP, URL and POST Status. The appropriate filters are checked: Banned User, Banned IP Address, Banned URL, Exception User, Exception IP Address, Exception URL and Malformed URL.
• If all of these tests are passed, then the NetSentron? fetches the file from the Internet. (So far it is the same as a Web Filter)
• Next the MIME-type and file extensions are checked. If the file is an allowed MIME-type or an allowed file extension, then it carries on to the next step. (Some Web Filters have this ability)
• The NetSentron® now checks the file to see if there is an ICRA rating in the page, providing that it is a web page and not some other sort of file. (This is where things start to differentiate from a Web Filter)
• If the page passes the ICRA ratings, then, the phrases and words in the page are checked against the banned phrase list, exception phrase list and weighted phrase lists. A running total is tabulated for the page and then checked against the threshold set by the administrator. (This is where the NetSentron® really differentiates itself from Web Filters, it is actually reading the content of the web page)
• If all of those checks are passed, the client will receive the web page or requested file.

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