CrowdSec is a collaborative, free, and open-source Intrusion Prevention System (IPS) software suite. It detects unwanted behaviors in applications & system logs to then enforce remediation at any level (firewall, reverse proxy, etc.) and of any sort (MFA, Captcha, drop, …). Another major strength of the product comes from its user network, where everyone can automatically share aggressive IP addresses that attack them. This collective, highly distributed crowd-sourced threat intelligence (CTI) offers an extra layer of protection. Therefore, CrowdSec combines both behavior and reputation, allowing everyone to have each other's back and form a global cyber defense shield.
