DNS servers are an important part of how your computer connects to the Internet. This page is about DNS servers that have been created specifically to help you filter your Internet connection (or that of your children).
Pluckeye can be used to enforce the use of a particular DNS server. See How to block only bad sites to find out how.
All of the following offer free services, amd most offer paid plans as well. If you benefit substantially from one of the following services, you might want to consider paying the provider.
CleanBrowsing is well regarded amongst conservative folk, and the company says their family filter is safer for kids than similar products such as OpenDNS.
You can subscribe to Clean Browsing for extra features.
You can subscribe to OpenDNS for extra features such as custom configuration and monitoring.
Safe Surfer looks similar in spirit to CleanBrowsing.
You can subscribe to Safe Surfer for extra features such as monitoring.