CrowdSec

What is CrowdSec?

CrowdSec is a free and open-source cybersecurity automation engine that leverages the unique combination of local IP behavior and global reputation features to protect IT assets and websites from various cyber attacks. The solution analyzes visitor behavior and provides an adapted response to all kinds of attacks, enabling users to protect each other by sharing information about malevolent actors within its user network. CrowdSec could be perceived as a modern Fail2ban, designed for cloud and container-based infrastructures. It uses a decoupled approach, where the detection and remediation processes are separated, and an inference engine that leverages leaky buckets, YAML, and Grok patterns to identify aggressive behaviors. The solution acquires signals from various data sources like logs, cloud trails, Kafka, and others, normalizes and enriches them to apply heuristics and trigger a bouncer to deal with the threat The key feature of CrowdSec is its Reputation engine, which captures all signals sent by all CrowdSec instances to curate and establish a reliable IP blacklist. This blacklist is constantly redistributed to the network members, enabling a form of Digital Herd Immunity. An IP caught aggressing against WordPress sites, for example, will quickly be banned by all members using CrowdSec and subscribing to the WordPress defense collection

Highlights

• Utilizes local IP behavior and global reputation features to protect against cyber attacks
• Enables users to share information about malevolent actors and protect each other
• Designed for cloud and container-based infrastructures using a decoupled approach
• Leverages leaky buckets, YAML, and Grok patterns to identify aggressive behaviors
• Acquires signals from various data sources and applies heuristics to trigger a bouncer
• Curates and distributes a reliable IP blacklist to achieve Digital Herd Immunity