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Block list & Allow List Filters - When using block lists, an administrator (which might be a parent) manually enters all websites that are deemed inappropriate into the program, and those sites are subsequently blocked.Schools - Schools tend to use web filtering in a similar manner to businesses and parents, hoping to block offensive and distracting content, while also hoping to protect against malware infection.Also, web filters serve as an effective assistance in stopping some malware infection. Businesses - that want to prevent employees from accessing websites that don't pertain to their jobs.Parents - who wish to prevent their children from accessing content they consider undesirable or inappropriate.The three largest groups that use web filtering are: With close to a billion active websites on the internet, there’s is no way that every website can be included on a web filtering programs exclusion lists. On the surface, web filtering is pretty simple, but like all things, as you start to learn more, everything becomes more complex. Many Web filter tools work off of a constantly updated URL database that shows which websites and domains are associated with hosting malware, phishing, viruses or other tools for harmful activities. Or, they can evaluate the content of the page live and block it accordingly. They can block content as determined by quality of the site, by consulting known lists which document and categorize popular pages across all genres of content. In general, Web filters work in two distinct ways. Web filters are made in different ways and deliver various solutions for individual, family, institutional or enterprise use. Web filtering is a technology stops users from viewing certain URLs or websites by preventing their browsers from loading pages from these sites.