Intrusion Detection (2)

• AIDE - Advanced Intrusion Detection Environment (aide.github.io) tool
  File and directory integrity checker: rule-built database of hashes, perms, ACLs, SELinux and xattrs
  Security Hardening #
• How To Protect SSH with Fail2Ban on Ubuntu 22.04 (digitalocean.com) tutorial
  Fail2ban jails that watch auth logs and ban repeated SSH login failures
  Security Hardening SSH #