Snort

Snort is the Open Source Intrusion Prevention System (IPS), IPS uses a series of rules that help define malicious network activity.

Product Description:

Snort can be deployed inline to stop packets, as well. Snort has three primary uses: As a packet sniffer like tcpdump, as a packet logger — which is useful for network traffic debugging, or it can be used as a full-blown network intrusion prevention system. Snort can be downloaded and configured for personal and business use alike.

Specialties:

System Security, Intrusion Prevention System(IPS), Network Security, Application Security.