Currently I use the
Networks & More! SecureSchool appliance for
content filtering. It does a great job, but it is getting increasingly difficult to keep up with the kids in getting around the filters with
CGI/
PHP proxies, clever word schemes, image searches and the like. In combating this, I've been pleasantly surprised by the extra protection offered by a
free recursive DNS service called
ScrubIT.
Basically all you need to do is change your router's DNS
servers to the ScrubIT servers (
67.138.54.100,
207.225.209.66) and that's it. I've found that there are no annoying or blatent advertisments on blocked page redirects, everything is clean and professional which is appreciated in a
business or
school environment. DNS lookup speeds seem to be on par or nearly on par with the
OpenDNS servers.
I'm not positive how ScrubIT blocks web content. I'm guessing from their website it has a lot to do with user feedback and the various "sources" where they receive their data (likely some of the many available blacklists). I'm not sure that it blocks content based on
keywords, most likely just
URL based filtering. While this is far from fool proof, it makes up for it in the fact that the settings cannot be modified by users (unless they have access to your
router). Encrypted URLs are not blocked by ScrubIT, so you will have to watch for users accessing CGI/PHP proxies to bypass your filters.
If you are interested in using this product in a school environment, I would suggest using it as an extra layer of filtering, rather than the sole filtering used by your district/building. For businesses, ScrubIT will likely be an excellent way to curtail pornography viewing by employees, especially if they are not web savvy. As an added bonus you will cut down on malware installations as ScrubIT filters those types of websites as well.
For those wondering about custom filtering ScrubIT is currently running a beta program allowing you to have your own
blacklists and
whitelists. I've applied for the program and am curious to see how easy it is to implement. I've yet to find a
website that I need blocked, but ability to have custom
filters could be extremely useful.
Currently I'm running ScrubIT in a school district and with a number of small businesses whom I contract with as a technical consultant. I've yet to run into any issues or complaints from my users, and a few nice compliments on the peace of mind offered by the service. It's worth checking into!
Again, the ScrubIT DNS server
IP addresses are as follows: