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.
CMS Security Systems, Inc. - Manufactures custom integrated access control and intrusion detection systems, video surveillance, and guard tour porducts.
COAST Intrusion Detection Hostlist - Clearinghouse listing of many of the Internet resourcefulnesses associated with intrusion detection and prevention systems. Includes inventories of commercial outputs, research projects, and divergent IDS-centric material.
Southwest Microwave, Inc. - Provides electronic perimeter intrusion detection and wireless CCTV transmission systems.
Intrudetect Inc. - Provides design of security architectures and intrusion detection systems, penetration testing, VPN and firewall management, security audits, and vulnerability assessments. Offices in the United States, Serbia and Montenegro.
Honeypots - Information covering intrusion detection and prevention systems, research and production honeypots, and incident handling. Also provides general overview of network security issues.
Open Systems AG - Managed security services and consulting including firewall, vpn, intrusion detection, anti-spam, anti-virus, authentication, proxy, and audits.
Linux Audit and Intrusion Detection - InterSect Alliance are the creators of the SNARE Linux C2-style Audit module, and have a consulting background in advanced audit analysis, intrusion detection systems, and forensics for Unix and farther operating systems.
Wired Security Solutions Information Security - Provides audits, regulatory compliance advantages, security design, intrusion detection systems and security policy development employments.
iSecurityShop - Offers hardware and software network security products including firewalls, cryptographic softmare, antivirus, and intrusion detection systems.
Multi-Agent Systems for Integrated Host and Network Based Intrusion Detection - Collaborative agents for intrusion detection and countermeasures in networked computing systems.
Smarter Security Systems Ltd. - Offers intrusion detection and perimeter access control solutions including infrared detection and optical turnstiles.
Sensor Technologies & Systems, Inc. - Manufacturers of wide band radar intrusion detection systems for military, government and security concerns.
Network Security Library - Windows, unix, netware, WWW, firewalls, intrusion detection systems, security policy, books, papers, and articles.
Dgonzalez Seguridad informática - Artículos sobre Intrusion Detection Systems, cables UTP de sólo recepción y aspectos legales de la seguridad informática.
Siddharta, Jain - Unix Systems Administrator working mostly on Solaris, networking, naming ervices, storage management, directory srvices, firewall and intrusion detection systems.
SecurityMetrics, Inc. - Web based security services to detect and repair security vulnerabilities on multiple platforms. Internal and external security solutions, provides vulnerability assessment, and intrusion detection systems.
Klein Associates - Manufacturer of side scan sonar systems, navigation and intrusion detection.
Point Secure - VMS intrusion detection systems.
Eurodaq - Specialized security solutions: secure hosting, data centers, firewalls, VPN, intrusion detection systems. Company profile, creations, services and references. Brussels and Antwerp. | 
