Whats a good web filter for a non-profit school-age PC lab?
Take a look at Screendoor. Its’ probably going to be your best bet for non-labor intensive content filtering. What you get is a black box PC that you hook up on a subnet between your internal networks and your pipe to the internet using an unswitched hub. It scans the traffic going out to the net and will cancel any requests that are on its blocked list. It will work with HTTP, FTP, NNTP, etc. They’ve got a huge list of blocked sites, arranged by category. That allows you some discretion. When I was put in the position to have to find and recommend such a system, all I blocked were the sex sites and let most other things through. There will be some sites that are blocked when they shouldn’t be, but at least with Screendoor you can edit the blocked list to rectify that. I couldn’t get them to give me a human readable version of their blocked list though. And the opposite is true too. There will be porn sites that a
