I'm guessing content filter as in blocking porn/illegal etc. websites?
Try OpenDNS - http://www.opendns.com/
All you do is sign up, set your filters (you can tick the categories you want allowed/disallowed), then change the DNS servers on the user's computers to the OpenDNS servers
I've used DansGuardian in the past, it was very good for the money! Seemed to generate a lot of false positives though, last thing you want to be doing is whiselisting URLs every 5 minutes.
I trialled a content filter by Barracuda Networks a couple of weeks ago, that was really competitively priced in comparison to Bloxx and Websense, however, it turned out to be a performer. It did exactly what I wanted, simple integration with AD, specific filters for certain groups, excellent reporting, you can request a trial unit from Barracuda, defiantely recommend it!
Martin
Barracuda are very good. We don't use them for web filtering we use a Sonicwall Pro 2040 for that. We DO use a Barracuda 300 spam firewall for inbound SMTP and I have to say it's a very powerful piece of kit. If the web filter is anything close to as clever as the spam filter then you'll be more than happy with it.
