Guides from the NOC

Skip the extra Varnish daemon. Set up Nginx's built-in FastCGI cache to speed up PHP-FPM sites on your VPS, with safe rules for logged-in users and carts.

SELinux blocking Nginx with 403 or Permission denied on your AlmaLinux VPS? Read the AVC denial, fix file contexts, booleans and ports the right way.

Learn how to configure Nginx limit_req to stop bot floods and brute-force attacks on your VPS, with real config examples, testing steps, and common mistakes.

Step-by-step guide to deploying Django or Flask on a VPS with Gunicorn, Nginx as a reverse proxy, and systemd, so it survives reboots, crashes, and deploys.

Install and configure Varnish Cache on your VPS to serve pages in milliseconds. Step-by-step setup for Apache or Nginx backends, plus fixes for common issues.

Learn how to host several websites on a single VPS with Nginx server blocks - correct document roots, per-domain SSL, and fixes for common config mistakes.

Set up Nginx as a reverse proxy on your VPS, secure it with free Let's Encrypt SSL, and fix 502 Bad Gateway, 504 Timeout, and WebSocket disconnect errors.

The connection opened and closed with nothing in it. That points at a backend that never replied, and there is one log line that names the cause exactly.

The server answered, and the answer was no. That is a much more specific failure than a timeout, and it points at four causes rather than twenty.

An HTTP/2 stream was rejected as malformed. Usually a bad header, a proxy that mangles frames, or PHP emitting output after the response - here is how to find which.

The connection opened, the request went out, and the server closed it without sending a response. Here is how to find out which layer hung up, and why.

Set up an llms.txt file so AI tools like ChatGPT and Perplexity can read and cite your site correctly. Step-by-step for WordPress, cPanel, and Nginx VPS.

Run your own private Git server on a VPS with Gitea. Step-by-step setup with Docker, Nginx reverse proxy, HTTPS, SSH push, and backup tips.

Still failing 'leverage browser caching' in PageSpeed or GTmetrix? Set Cache-Control and Expires headers correctly on cPanel and VPS hosting - step by step.

Self-host n8n workflow automation on a VPS using Docker, Postgres, and Nginx with HTTPS, plus fixes for webhook, encryption key, and disk-space errors.

Learn how to load test your VPS with ab, wrk, and k6 before a launch or sale, and fix the PHP-FPM, MySQL, and Nginx limits that cause it to fall over.

Install MinIO on your VPS for self-hosted S3-compatible object storage: systemd service, Nginx TLS proxy, bucket policies, and fixes for common errors.

Running Docker Compose on a VPS? Fix containers that vanish after reboot, port conflicts with Nginx, volume permission errors, and lost data, the right way.

Planning a do-release-upgrade on your Ubuntu VPS? Use this safe checklist to avoid downtime, broken PHP/Nginx configs, and SSH lockouts mid-upgrade.

Getting a 408 Request Timeout during an upload or form submit? See why the client-side timeout trips in Nginx, Apache & Cloudflare, and how to fix it.

AutoSSL or Certbot can't validate your domain? Learn why .well-known/acme-challenge gets blocked and how to fix it on cPanel, Nginx, and Apache.

Site crawling or throwing 502s under traffic? Learn how to calculate pm.max_children and pick dynamic vs ondemand vs static PHP-FPM on your VPS.

Seeing a 414 Request-URI Too Long error? Learn why redirect loops, plugins, or query strings blow past Nginx/Apache URL limits, and how to fix each cause.

SSL warning on www or duplicate URLs indexed twice? Learn to pick a canonical domain and set up a proper 301 redirect in cPanel, WordPress, Apache, and Nginx.