Ax3soft Sax2 is a professional intrusion detection and prevention system that performs real-time packet capturing, 24/7 network monitoring, advanced protocol analyzing and automatic expert detection. By giving you insights into all of your network's operations, Sax2 makes it easy to isolate and solve network problems, identify network bottleneck and bandwidth use, detect network vulnerabilities and discovered the network....
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This download (Intrusion detection system(NIDS) - Sax2) is shareware. "Shareware is a marketing method for computer software. Shareware software is typically obtained free of charge, either by downloading from the Internet or on magazine cover-disks. A user tries out the program, and thus shareware has also been known as "try before you buy". A shareware program is accompanied by a request for payment, and the software's distribution license often requires such a payment." More info at
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