Crowdsec

The Complete Self-Hosting Security Stack: Fail2Ban + CrowdSec + Authelia Running self-hosted services on the open internet without a security stack is like leaving your front door unlocked in a busy neighborhood. Individual tools help, but real protection comes from layering defenses so each one covers the gaps of the others. This guide builds a complete security stack using three open-source tools: Fail2Ban — reactive log-based banning for brute-force attacks CrowdSec — community-powered threat intelligence and behavioral detection Authelia — authentication portal with single sign-on and multi-factor authentication Together, they give you intrusion prevention, shared threat intelligence, and access control. All running in Docker, all free. ...

Your self-hosted server is exposed to the internet. Bots, brute-forcers, and scanners hit it constantly. Fail2ban helps, but it only learns from your own logs. What if you could tap into threat intelligence from thousands of other servers? That’s CrowdSec. It’s like a community-powered immune system for your infrastructure. What Is CrowdSec? CrowdSec is an open-source security engine that: Parses your logs (Nginx, SSH, Traefik, WordPress, etc.) Detects attack patterns using behavioral scenarios Blocks attackers via bouncers (firewall rules, Nginx deny, Cloudflare API) Shares threat intel — when you block an IP, the community benefits and vice versa Think of it as Fail2ban + community blocklists + modern architecture. ...