NIDS
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how to
Hack Like a Pro: Snort IDS for the Aspiring Hacker, Part 3 (Sending Intrusion Alerts to MySQL)
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how to
Hack Like a Pro: Snort IDS for the Aspiring Hacker, Part 2 (Setting Up the Basic Configuration)
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how to
Hack Like a Pro: Snort IDS for the Aspiring Hacker, Part 1 (Installing Snort)