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
Zeek Remote desktop fingerprinting script for fingerprinting Remote Desktop clients.
AWS Shield provides managed DDoS protection for your applications, automatically detecting and mitigating sophisticated network-level DDoS events.
Tool used to scan a range of IP addresses to identify active hosts and gather information about them.
Load-balancing solution by Microsoft Azure with global infrastructure and financial guidance.
Open-source set of libraries and drivers to accelerate network performance.
Sniffglue is a network sniffer tool written in Rust with advanced filter sensitivity options and secure packet processing.
PINNED

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

PTJunior
An AI-powered penetration testing platform that autonomously discovers, exploits, and documents vulnerabilities while generating NIST-compliant reports.

CTIChef.com Detection Feeds
A tiered cyber threat intelligence service providing detection rules from public repositories with varying levels of analysis, processing, and guidance for security teams.

ImmuniWeb® Discovery
ImmuniWeb Discovery is an attack surface management platform that continuously monitors an organization's external digital assets for security vulnerabilities, misconfigurations, and threats across domains, applications, cloud resources, and the dark web.

Checkmarx SCA
A software composition analysis tool that identifies vulnerabilities, malicious code, and license risks in open source dependencies throughout the software development lifecycle.

Orca Security
A cloud-native application protection platform that provides agentless security monitoring, vulnerability management, and compliance capabilities across multi-cloud environments.

DryRun
A GitHub application that performs automated security code reviews by analyzing contextual security aspects of code changes during pull requests.