| COAST Intrusion Detection Hostlist | | Clearinghouse listing of many of the Internet resources associated with intrusion detection and prevention systems. Includes inventories of commercial products, research projects, and other IDS-centric material. |
| Deepnines Technologies | | Network security solution designed for deployment immediately outside the perimeter. Product suite integrates firewall, intrusion prevention, secure content management, and forensics reporting. |
| DShield | | Distributed Intrusion Detection System. Submit your own firewall log excerpts or browse through current activity reported to the system. Features a list of the "most wanted" abusive IP addresses. |
| Internet Storm Center | | Operated by the SANS Institute, the ISC provides a user-supported infrastructure for intrusion detection systems to share information about ongoing attacks that span countries, networks, and administrative boundaries. |
| Intrusion Detection System Resources | | Comprehensive collection of tutorials, product reviews, general information and other resources dealing with Intrusion Detection and Prevention Systems. |
| Linux Security IDS | | An excellent source of IDS-related information, including security best practices, audit procedures, penetration testing, community information and more. |
| Michael Sobirey's IDS Page | | An excellent index of most currently available IDS and IPS products, including vendor contact information. |
| NetWitness | | Network monitoring tool that helps identify inappropriate use of network resources using live traffic analysis or output from other IDS systems. |
| Privacyware Intrusion Prevention and Detection | | Extends the capabilities of conventional security systems to help manage threats more efficiently and effectively. Includes a wide array of intrusion detection and analysis tools for Windows servers. |
| Security Library | | Collection of detailed technical papers on focusing on TCP networks, Intrusion Detection Systems, firewall protection and more. |
| SecurityFocus | | Intrusion detection focus area; designed to assist discussion on security related topics, and provides a comprehensive database of security knowledge and resources. It also hosts the BUGTRAQ mailing list. |
| Talisker Security Wizardry | | Large index of computer security resources, including a glossary of Intrusion Detection and Prevention systems. | |
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