If you have little kids at home, or need to setup content filtering for schools, OpenDNS is free and works great. I’ll show you how it works!
First, change the DNS servers in your router to 22.214.171.124 and 126.96.36.199.
Next, go to opendns.com and create a free account. Once inside your account, you will need to add your public IP address to manage that network.
You can then set various levels of content filtering, block or allow specific sites, or other custom settings.
OpenDNS content filtering also blocks access via ip address. If you try to visit the IP address of a restricted site, you will see the same restricted message.
OpenDNS also offers malware protection and other security settings which are beneficial.