Quick answer: CrowdSec detects attacks in logs and blocks IPs via a bouncer – often the better Fail2ban alternative in 2026, combined with UFW.
Related
VPS & root servers: Order VPS in Germany · NexoraHost · nexorahost.com (Maincubes FRA01 Frankfurt · Ryzen · NVMe · GDPR)
Frequently asked questions (FAQ)
CrowdSec or Fail2ban?
Fail2ban: local, proven. CrowdSec: community blocklists, modern scenarios, often better bot detection. Rarely need both.
Can CrowdSec block legit users?
Possible with aggressive scenarios. Whitelist your IPs/VPN; check cscli decisions list.
CrowdSec without UFW?
No. Base firewall (UFW) + CrowdSec bouncer. UFW opens ports; CrowdSec blocks attacker IPs.
Resource use?
Low (usually
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