What is a web filter

What is a web filter?

A web filter, commonly known as a "content filter", is software that restricts the web pages that users can access from their computer. These filters can be based on an allowlist or a denylist: the former allows access to websites that have been specifically selected by the person who set up the filter. The latter prevents access to undesired websites that are defined by the standards installed in the filter. These programs check the URL of the website you want, search the website's content for restricted keywords, and then decide whether to block or allow the connection. Filters are often installed as a browser extension, as a standalone computer program, or as part of an overall security solution. However, they can also be installed on the network side by either the ISP or a company to restrict multiple users from accessing the web at the same time. Some search engines also offer rudimentary filters to remove unwanted pages from the search results.

Filter software

There are two main groups of customers for web filtering software: parents who do not want their children to access content they consider undesirable or inappropriate, and companies who want to prevent their employees from accessing websites that are not theirs Concern work. Web filters are also commonly used as a preventive measure against malware because the filters block access to websites that frequently host malware, such as web sites. B. Websites related to pornography or gambling. Advanced filters can even prevent information from being sent over the Internet so that confidential data is not exposed.

There are ways to bypass web filters, such as: B. through a web-based proxy, the use of foreign language pages or the use of a VPN to a personal proxy server. Because of these loopholes, network administrators or concerned parents need to ensure that the filters they choose can do more than just block or allow access to specific websites.


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What is a web filter?

Kaspersky
A web filter restricts access to certain websites that contain harmful malware. Find out everything there is to know about internet security.