| Snort |
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Snort is an advanced open source network intrusion detecion system (NIDS)
that detects and logs possible network attacks. One of the best NIDS around. |
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| Nmap |
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Open source network exploration and auditing tool. Includes support for TCP/IP fingerprinting and generation of TCP/IP sequence prediction probability statistics. |
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Port of Nmap for Windows NT/2000. |
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| Whitehats |
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Excellent security web site. Home of arachNIDS, a comprehensive and up-to-date database of network attack signatures. |
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| SecurityFocus |
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Excellent general security site. Good source of up-to-date information and resources. |
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