Nginx

Nginx shows 502 Bad Gateway, PHP-FPM won't start, and the usual config test passes. The real issue is often a stuck FPM process holding the socket. Here's how to find it and fix it safely.

When something breaks, the access log tells a story. Learn how to read live and gzipped logs, find top IPs and failing URLs, zoom in on time windows, and tie logs to WAF blocks using simple command-line tools.

Want faster loads? Turn on HTTP/2 and, if possible, HTTP/3. This guide shows how to enable both on Nginx, Apache, and common CDNs, how to check they work, and quick fixes if they don't.