TippingPoint Digital Vaccine Laboratories
DID YOU KNOW... The ZDI has published over 1100 high-risk vulnerabilities since the inception of the program.

Filtering Content: Online Web Proxy Detection

As of late, we have seen a fairly significant number of customer requests for filters that block access to free online proxy websites. Those of you who subscribe to our Digital Vaccine service have probably noticed the influx of filters addressing these requests; I thought you might find it interesting to understand just how it is that we are able to cover such a wide swath of websites with a relatively small filter set. One of the easiest ways to evade URL or IP base ...