How long does Linux server hardening take?

Basic hardening—SSH config, firewall, Fail2Ban setup—takes 1-2 hours for a single server. Most of that's testing. The actual implementation is maybe 20 minutes of commands.

Will changing the SSH port really stop attackers?

It won't stop sophisticated attackers, but it stops 90% of automated bot traffic. You're not trying to stop every attacker; you're making yourself a harder target than the default setup. Bots move on to easier prey.

Do I really need Cloudflare Tunnels if I have a firewall?

No, but they solve different problems. A firewall controls what ports are open. Tunnels hide your server from the internet entirely. Use both for defense-in-depth. One is preventative, the other is evasion.

🔒 Security & Privacy

Linux Server Security Isn't Boring—Here's Why Your SSH Port Is Being Attacked Right Now

Bots are scanning your server's default SSH port this very second. Here's how to lock down Linux infrastructure before they get in.

Open Source Beat Apr 03, 2026 5 min read 14 views

A terminal window showing hardened SSH configuration with secure settings highlighted, representing Linux server security best practices

⚡ Key Takeaways

Bots scan SSH port 22 millions of times daily—default settings are indefensible in 2024. 𝕏
SSH hardening (key-based auth, custom port, disabled root login) eliminates the majority of brute-force attacks. 𝕏
Zero-trust access via Cloudflare Tunnels makes your server invisible to port scanners, flipping the security model from perimeter defense to zero-exposure. 𝕏
Automated patching and Fail2Ban turn defense into a set-it-and-forget-it process. 𝕏
One hour of hardening prevents weeks of incident response and potential data loss. 𝕏

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Open Source Beat

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#DevOps security #Linux server hardening #SSH security #firewall configuration #zero-trust architecture

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Originally reported by Dev.to

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