NetSentron is a true content filter that quadruple filters website content to determine whether it is safe for your students to view. NetSentron filters web content using the following method.
A student enters a URL into their browser, which automatically sends a request to NetSentron. First, the header is check for: user name, malformed URL, source IP, URL, and POST status. Next, the appropriate filters are checked, including: Banned User, Banned Address, Banned URL, Exception User, Exception IP Address, Exception URL, and Malformed URL. If all of these test are passed, NetSentron will fetch the file the student is attempting to access from the Internet.
A typical web filter would finish the filtering process here, but Netsentron goes one step further: analyzing the actual content of the websites in addition to the qualifications and classifications of the website’s listing. NetSentron continues filtering the content, similar to a few advanced web filters, next checking the MIME-type and file extensions. If the file is an allowed MIME-type or extension, the file is then checked to see if the page has an ICRA rating. If the page passes the ICRA ratings, then the phrases, words, and images in the page are checked against the banned phrase list, exception phrase list, and weighted phrase lists. Every check is assigned a score based on how closely it meets the standards of the relevant list, and a running total is tabulated for the page. The total is then checked against the threshold set by the administrator, and if it falls within the allowable boundaries, the website that the student was attempting to access will be displayed.
The final process, where NetSentron “reads” and analyzes the content of the web page is where it truly differentiates from typical web filters.