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Offers multiplatform security secure, detect, and audit. (AS/400, Unix, Linux and Windows NT/2000)

"Clue-Gathering Tools for Network and Security Managers" from which an IDS can be built. Source code freely available.

NGSEC is a security company with two main focuses: ngProducts (set of security solutions ranging firewalls, and IDS) and ngServices (penetration tests, source code auditing, software and development).

NIKSUN is the recognized worldwide leader in developing and deploying a complete range of network performance monitoring, security surveillance and forensic analysis tools serving a wide range of protocols and interfaces, ranging from Ethernet and Gigabit Ethernet to OC-3. Our products are the only network appliances that continuously capture and analyze LAN, MAN and WAN traffic at Gigabit rates in a single platform.

An adaptive Intrusion Detection System from nSecure.

Real-time network sensor-based Intrusion Detection System (IDS). Based on snort, features include live signature updates and custom signature creation.

Information security specialists providing penetration testing, vulnerability assessment, application security audit and intrusion detection implementation services

Offers the checkmate intrusion detection software and network security consulting.

Manufacturer of Intrusion Detection/Prevention appliances. Features include Layer 2 network bridge operation, an integrated hardware/software solution, and automatic attack signature updating.

Manufacturer of server security products intended to safeguard HTTP transactions, identify and protect against web server vulnerabilities.