CrowdSec
Open Source MITCollaborative open-source security through crowd intelligence
Description
CrowdSec is a modern open-source security tool based on collaborative threat detection. It analyzes logs in real time, detects malicious behavior, and shares threat intelligence with the community. CrowdSec supports numerous bouncers (defense mechanisms) for various services and provides a central console for managing multiple instances.
Preview
Platforms
Linux Windows Docker
Replaces the following proprietary tools
Cisco ASA → CrowdSec
proprietary firewalls → CrowdSec
Self-Hosting
CrowdSec can be self-hosted on your own infrastructure. Visit the official documentation for installation instructions.
Documentation →Categories
Tags
#crowd-intelligence
#bedrohungserkennung
#bouncers
#logs
#go
Similar Tools
pfSense CE
Powerful open-source firewall and router distribution
Apache-2.0 ●●● Advanced Self-hostable
Cisco ASA proprietary firewalls
Last: Feb 2026 5.0k
View details →
OPNsense
Modern FreeBSD-based firewall with weekly updates
BSD-2-Clause ●●● Advanced Self-hostable
Cisco ASA proprietary firewalls
Last: Feb 2026 3.4k
View details →
Fail2ban
Automatic protection against brute-force attacks
GPL-2.0 ● Easy Self-hostable
Cisco ASA proprietary firewalls
Last: Feb 2026 12.0k
View details →