Libnids is an implementation of an E-component of Network Intrusion Detection System. It emulates the IP stack of Linux 2.0.x. Libnids offers IP defragmentation, TCP stream assembly and TCP port scan detection. The most valuable feature of libnids is reliability. A number of tests were conducted, which proved that libnids predicts behaviour of protected Linux hosts as closely as possible. Libnids is highly configurable in run-time and offers a convenient interface. Currently it compiles on Linux, *BSD and Solaris. WIN32 port is maintained separately here. Using libnids, one has got a convinient access to data carried by a TCP stream, no matter how artfully obscured by an attacker. You may have a look at a sample application. Libnids is designed by Rafal Wojtczuk. Numerous people have contributed - see the README file in the source directory. For more information on libnids contact Rafal Wojtczuk. It emulates the IP stack of Linux 2.0.x. Currently it compiles on Linux, *BSD and Solaris. Using libnids, one has got a convinient access to data carried by a TCP stream, no matter how artfully obscured by an attacker. Libnids is designed by Rafal Wojtczuk. Numerous people have contributed - see the README file in the source directory. For more information on libnids contact Rafal Wojtczuk.
FEATURES
ALTERNATIVES
Fail2ban is a daemon that scans log files and bans IPs showing malicious signs to protect servers from brute-force attacks.
A free DNS recursive service that blocks malicious host names and protects user privacy.
A technique to associate applications with TLS parameters for identifying malware and vulnerable applications.
PINNED

InfoSecHired
An AI-powered career platform that automates the creation of cybersecurity job application materials and provides company-specific insights for job seekers.

Mandos Brief Newsletter
A weekly newsletter providing cybersecurity leadership insights, industry updates, and strategic guidance for security professionals advancing to management positions.

Kriptos
An AI-driven data classification and governance platform that automatically discovers, analyzes, and labels sensitive information while providing risk management and compliance capabilities.

System Two Security
An AI-powered platform that automates threat hunting and analysis by processing cyber threat intelligence and generating customized hunt packages for SOC teams.

Aikido Security
Aikido is an all-in-one security platform that combines multiple security scanning and management functions for cloud-native applications and infrastructure.

Permiso
Permiso is an Identity Threat Detection and Response platform that provides comprehensive visibility and protection for identities across multiple cloud environments.

Wiz
Wiz Cloud Security Platform is a cloud-native security platform that enables security, dev, and devops to work together in a self-service model, detecting and preventing cloud security threats in real-time.

Adversa AI
Adversa AI is a cybersecurity company that provides solutions for securing and hardening machine learning, artificial intelligence, and large language models against adversarial attacks, privacy issues, and safety incidents across various industries.