Users of the free DNS service OpenDNS are already familiar with additional blocking options that an OpenDNS account offers. It is for instance possible to configure web filters to block contents such as adult themes, pornography, proxies and anonymizers or gambling.

The web filter is fully customizable to block only the selected contents in the network the DNS servers are used. Those filtering customizations are on the other hand only available for free or paid OpenDNS account owners and not for users who have simply switched their DNS servers to the provider.

OpenDNS FamilyShield has been designed for families who want a ready to run solution. The DNS servers come with family friendly filtering activated so that account creation and configuration is not necessary.

Filters to block adult contents, proxies and anonymizers are automatically active after changing the DNS servers to the FamilyShield IPs.

More: http://www.ghacks.net/2010/06/23/opendns-familyshield-blocks-18-contents-automatically