Snort
Snort is an open source network intrusion detection system, capable of performing real-time traffic analysis and packet logging on IP networks. It can perform protocol analysis, content searching/matching and can be used to detect a variety of attacks and probes, such as buffer overflows, stealth port scans, CGI attacks, SMB probes, OS fingerprinting attempts, and much more.
Prevx 3.0
Home computer users remain vulnerable to each new (‘Zero Day’) cyber-attack during the critical period between the launch of a new attack and a “signature” update becoming available. Spyware tools only detect and clean up installed malware AFTER the infection has happened. Often threats are missed entirely by traditional security tools. Prevx Home STOPS ‘Zero Day’, Spyware and hack attacks and STOPS malicious software from installing on your PC.
AIDE (Advanced Intrusion Detection Environment)
AIDE (Advanced Intrusion Detection Environment) is a free replacement for Tripwire. It does the same things as the semi-free Tripwire and more.
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