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Freeware applications and open source software that provide IT managers with great tools at no cost

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Snort is an open source network intrusion prevention and detection system that uses a rule-driven language to combine several methods of protecting networks, such as signature, protocol and anomaly-based inspection practices. Key features: Snort has three primary uses: It can be used as a straight packet sniffer like tcpdump, a packet logger (useful for network traffic debugging, for example), or as a full-blown network intrusion prevention system.

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