OpenDNS is provides free domain name resolution (DNS) servers for you to use. These servers block a lot of bad content and are quite quick. The best way to get OpenDNS working is to configure your ADSL modem/router to use their nameserver IP addresses. Thes are:

• 208.67.222.222
• 208.67.220.220

You can also create a free account with them to further manage your network activity and content filtering. Note that OpenDNS provides a dynamic IP service so it will still work even if you go through a dynamic IP.

Another useful tool for managing DNS entries is zoneedit.