Crowdsec Has a Free Open-Source Security Engine

CrowdSec is a free, open-source security engine that detects and blocks malicious behavior using crowd-sourced threat intelligence. What Is CrowdSec? CrowdSec analyzes your logs, detects attacks, and shares threat intelligence with the community. Think of it as a collaborative fail2ban on steroids. Key features: Log analysis and threat detection Community-driven IP blocklists Multi-service: SSH, HTTP, WordPress, etc. Bouncers (block at firewall, Nginx, Traefik, CloudFlare) Dashboard (CrowdSec Console) REST API Low resource usage 100+ pre-built scenarios Quick Start curl -s https://install.crowdsec.net | sudo sh sudo apt install crowdsec sudo apt install crowdsec-firewall-bouncer-iptables CrowdSec immediately starts analyzing your logs and blocking bad IPs. How It Works Detect: CrowdSec parses logs (Nginx, SSH, WordPress, etc.) Decide: Compares behavior against scenarios (brute force, scanning, etc.) Block: Sends decisions to bouncers (firewall, Nginx, etc.) Share: Shares malicious IPs