I just found out my company’s employees have been finding ways to get around my Web filtering. And that came as a surprise, because I use a best-in-class product that employs a database to categorize and block website URLs, which I thought I could rely on. But as I found out, that product is not perfect.

It all started when I downloaded a trial version of software that analyzes network traffic to the Internet. It’s a pretty cool product. Not unlike the Web filtering technology, it uses a database to compare the traffic on my network to known risks, like file-sharing sites and unapproved cloud services. The way it works is simple: I export my firewall logs to a (rather large) file, import them into the software, and it combs through all the traffic to websites and compares it against the risk database. I thought it would be good validation of my website blocking capability — and I was right. But I expected my website filtering to be a lot more effective than it turned out to be.

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