What are the 5 essential steps for Linux server hardening?

These: SSH tweaks (no root, keys only, custom port), UFW default deny, Fail2Ban, Cloudflare Tunnels, auto-patching.

How do I secure SSH on Linux quickly?

Edit sshd_config: Port 2204, PermitRootLogin no, PasswordAuthentication no. Restart and test.

No—it's inbound zero-port magic, but layer UFW for localhost escapes.

Shodan scans reveal 5+ million exposed Linux SSH ports. One wrong default, and your server’s toast—here’s the hardening playbook that actually works.

DevTools Feed Apr 03, 2026 3 min read

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#Fail2Ban #Linux server hardening #SSH security #Zero Trust tunnels

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Originally reported by dev.to