Web filtering is about blocking access to certain websites based on their category (Pornography, Social Media, Proxy Sites, News, and so on). Untangle provides two versions of the web filter application: the free Web Filter Lite and the paid Web Filter.
When a user requests a website, the web filter application will send the URL of this website to a categorization database, which includes many websites and their category. The database will return the website category to the application, which will take an action (permit/deny access to this website) based on its settings.
Untangle Web Filter Lite is based on a community-maintained database that has about 1 million websites in 15 categories and receives few updates per year, while the paid Untangle Web Filter is based on the zVeloDB URL database, which has over 500 million categorized URLs and about 5,000 categories. zVeloDB considers the de facto of web filtering and it's the first choice...