Snort 2.6 and Afterglow
Snort started out as a signature, rules-based Intrusion Detection System (this was around 2000 when I first was introduced to it). Now it has grown into much more: “Snort is an open source network intrusion prevention and detection system utilizing a rule-driven language, which combines the benefits of signature, protocol and anomaly based inspection methods.” Afterglow is a visual log analysis tool.
At UNIX Review.
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