Author Topic: How to Evade URL Filters With (Not-So) Fancy Math  (Read 1914 times)

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March 22, 2010, 03:23:43 pm
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SysAdMini

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http://threatpost.com/en_us/blogs/how-evade-url-filters-not-so-fancy-math-032210

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The technique takes advantage of the fact that modern browsers will allow users to specify IP addresses in formats other than base 10. So a typical IP address that looks something like this-- 192.10.10.1--can also be written in base 8, hexadecimal or a handful of other formats, and the browser will recognize it and take the user to the specified site.
Ruining the bad guy's day