Psad Intrusion Detection System

The Port Scan Attack Detector psad is a lightweight system daemon written in is designed to work with Linux iptables/ip6tables/firewalld firewalling code to detect suspicious traffic such as port scans and sweeps, backdoors, botnet command and control communications, and more. It features a set of highly configurable danger thresholds (with sensible defaults provided), verbose alert messages that include the source, destination, scanned port range, begin and end times, TCP flags and corresponding nmap options, reverse...
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