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 Knock Knock Knockin' On Firewall's Door

In this great hakin9 article, Raul Siles examines some of the key aspects of firewall technology, port knocking and one of its derivatives - Single Packet Authorisation. He writes, "Fortunately, the usage of the firewall as the one and only protection mechanism was a common thought years ago..." - if you wish to find out more on this fascinating topic read a complete article for free here.

 (Submitted by Magdalena - hakin9 editor Wed Aug 8, 2007 )


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