Turning the tables on miscreants who paralyze websites with torrents of junk data, security researchers have published a detailed manual that shows how to neutralize some of the Internet's most popular denial-of-service tools.
The do-it-yourself how-to provides instructions that even hacking novices can follow to exploit critical vulnerabilities in "Dirt Jumper," a family of tools used to wage the crippling denial-of-service attacks.
source : http://www.prolexic.com/knowledge-center-ddos-threat-advisory-pandora-and-vulnerability-disclosure-dirt-jumper/banners.html; http://arstechnica.com/security/2012/08/ddos-take-down-manual/