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Cipherdyne Security Blog  
Computer security blog and website of Michael Rash, author of "Linux Firewalls: Attack Detection and Response with iptables, psad, and fwsnort".

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Creating Ghost Services with Single Packet Authorization

Nov 29, 2009
Most usages of Single Packet Authorization focus on gaining access to a service such as sshd that is behind a default-drop packet filter. The point being that anyone who is scanning for the service cannot even tell that it is listening - let alone...

Speaking at the SANS Incident Detection Summit

Nov 24, 2009
At the upcoming SANS Incident Detection Summit on December 9th and 10th I will be participating in two panel discussions. The first is entitled "Enterprise Network Detection Tools and Tactics" and is described by Richard Bejtlich (who has organized...


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