A DNS (Domain Name System) website filter is a tool or service that uses DNS to restrict or control access to specific websites. DNS filtering involves modifying or blocking DNS queries to control access to certain websites or content categories.
Website Content Filtering: Blocking access to websites that contain inappropriate or objectionable content, such as adult content, gambling, or violence.
OpenDNS (now part of Cisco Umbrella):
- OpenDNS offers a free version with basic content filtering features. It allows you to block specific categories of websites, such as adult content, social media, or gaming sites. You can set up OpenDNS on your router or individual devices. Configuration instructions are available on the OpenDNS website
Quad9 DNS Filtering:
- Quad9 is a free DNS service that focuses on security and privacy. It includes a threat intelligence feed that can block access to malicious websites. While Quad9 is not primarily designed for content filtering, it can help protect against known malicious sites.
CleanBrowsing DNS Filter:
- CleanBrowsing provides free DNS filters for various content categories, including adult content, gambling, and more. They offer different filtering options, such as security filtering and family filtering, with configuration instructions on their website.