UFW + CrowdSec: Stop Malicious Port Scans (From Fail2ban Pain to a Modern Solution)
UFW + CrowdSec: Stop Malicious Port Scans Subtitle / Abstract: How do you protect exposed server ports? This guide shows how to move past Fail2ban regex hell and build a stable, automated, intelligent port-scan defense system. Target readers Developers using FRP or reverse tunnels Operators of cloud servers (Tencent, Alibaba, AWS, etc.) Linux users who want to stop port scans and SSH brute force People using Fail2ban who want a modern alternative Anyone improving personal server security Background / Motivation: Why you need port-scan defense When you run FRP (frps + frpc) or expose multiple ports, you will often see: ...