How can I filter my internet connection based on content? [closed]

You might want to consider using OpenDNS (http://opendns.com/), though it's strictly not based on content but on domain names.

"I generally recommend K9 Web Protection. It works, is fairly simple to administer and I've had no complaints from the users I've set up with it.

http://www1.k9webprotection.com/"

"You can checkout this link: http://kb.mozillazinedotorg/Parental_controls
It talks about firefox plugins for content filtering(links to these plugins are also given) as well as Web filtering software's."

"Glubble (a modification of the firefox browser) would probably be worth looking at. It works on a whitelist system, which makes it very restrictive, and would therefore be more useful for the younger children.

You could also instate a system of observation, install VNC on their computer, allowing you to watch what they are doing. You may find that just telling them you can see what they are doing is a more effective deterrent than any filter."

Norton Online Family provides control of content based on categories which can be set up by Windows login. Using different logins enables Younger children to view content appropriate for their age but allows teenagers more freedom. IM can be restricted to approved contacts and time restrictions can be set-up to prevent late night surfing.