Open-source alternatives to Respounder

Endlessh is an SSH tarpit and network honeypot designed to mitigate automated SSH brute force attacks. It acts as a defensive layer that protects servers by diverting malicious connection attempts into a slow-motion trap. The project implements a tarpit by sending endless, throttled banners to clients, which keeps connections open indefinitely to occupy attacker resources and slow down network scans. The service includes connection rate limiting to prevent system resource exhaustion and provides monitoring through connection activity and diagnostic data logging to system logs. Process manage

Protocol Analysis/Decoder Framework

A tool to catch spoofed NBNS responses.

Real Intelligence Threat Analytics (RITA) is a framework for detecting command and control communication through network traffic analysis.

Stenographer is a packet capture solution which aims to quickly spool all packets to disk, then provide simple, fast access to subsets of those packets. Discussion/announcements at stenographer@googlegroups.com

Maltrail is a malicious traffic detection system used for network intrusion detection. It consists of a network intrusion sensor for monitoring interfaces, a threat intelligence aggregator for syncing blacklists, and a detection engine that identifies security threats through signature matching and heuristic attack patterns. The system distinguishes itself through a distributed sensor architecture that collects traffic data from multiple remote probes and forwards events to a central analysis server. It employs heuristic behavioral analysis to identify unknown threats, such as port scanning o

Tenzir is the data pipeline engine for security teams.

Tsunami Security Scanner is a network vulnerability scanner and security auditor designed to identify high-severity flaws across network assets. It functions as an asynchronous security probe engine that utilizes automated probes and specialized detection logic to find critical weaknesses and prioritize remediation efforts. The project is distinguished by a plugin-based scanning engine, which uses a modular architecture of interchangeable detection plugins to identify vulnerabilities. This extensibility allows for the development and integration of custom security plugins to expand the variet

Arkime is a distributed packet analysis platform and full packet capture system designed for recording raw network traffic, indexing metadata, and performing network forensics. It functions as a network traffic indexer and security tool that enables the monitoring, querying, and browsing of large-scale network traffic across multi-cluster architectures. The platform distinguishes itself through its ability to manage distributed capture clusters from a centralized administrative dashboard. It integrates external data feeds with internal traffic logs to identify known threats and provides a pro