Hardening basics, locking down SSH, managing the firewall, and auditing what you inherit
Hardening, auditing, and best practices — the foundation for everything else in the series.
Read Part 1 →Keys, config, and security best practices — locking down the most commonly attacked service on any Linux box.
Read Part 2 →
firewalld, nftables, and
iptables — controlling what traffic gets in and
out.
What to check when you inherit a system — a practical checklist for finding out what you're actually dealing with.
Read Part 4 →