![Diagram of Dan Kaminsky\'s explanation of how DNS can be \"poisoned\"](http://www.globalnerdy.com/wordpress/wp-content/uploads/2008/08/badguy-kaminsky-poison-dns.gif "Diagram of Dan Kaminsky\'s explanation of how DNS can be \\"poisoned\\"")
Steve Friedl has a number of excellent technical explanations on his site, and his latest one, An Illustrated Guide to the Kaminsky DNS Vulnerability, is a masterpiece that does a fine job of explaining the DNS vulnerability that Dan Kaminsky found.
An Illustrated Guide to the Kaminsky DNS Vulnerability
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