A freshly provisioned Ubuntu VPS on Hetzner, OVH, or DigitalOcean receives its first SSH brute-force attempt within 12 minutes. These 10 commands — AppArmor, firewalld, fail2ban, auditd, AIDE, kernel hardening, Lynis, and unattended-upgrades — lock it down in 5 minutes flat.

CrowdSec blocks 80% of malicious IPs before they reach your logs by pooling attack signals across 14,000 community nodes. It outperforms Fail2ban on everything except single-server SSH protection.