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Guides from the NOC

Written from running the hardware — what breaks, why, and the command that fixes it.

52 posts matching “security” · Clear

All 52 Most read VPS 15 WordPress 13 Hosting 12 cPanel 5 Troubleshooting 5 Domains 2
Troubleshooting 429 Too Many Requests Error: Causes and How to Fix It

Getting a 429 Too Many Requests error on your site or API? Learn what triggers rate limiting, how to diagnose the source, and the fixes that actually work.

13 July 2026 · 6 min · 18 views Troubleshooting 500 Internal Server Error: Common Causes and How to Fix It

Seeing a 500 Internal Server Error? Learn the real causes - .htaccess, PHP limits, plugin conflicts, mod_security - and fix each one step by step.

12 July 2026 · 6 min · 26 views VPS VPS Firewall Basics: Set Up UFW and Close Open Ports

Learn how to set up UFW on your VPS, allow only the ports you need, and stop random port scans from finding an open door into your server.

12 July 2026 · 6 min · 15 views VPS SSH Hardening on Your VPS: Keys, Sudo User & Fail2Ban

Stop SSH brute-force bots on your VPS: set up key-based login, disable root access, and configure Fail2Ban step by step.

11 July 2026 · 5 min · 14 views