Nginx Troubleshooting Guides

Nginx errors can surface at the worst possible moments — during deployments, under peak traffic, or in the middle of critical operations. This collection of 3 troubleshooting guides covers the most common Nginx issues encountered in network infrastructure, protocols, and connectivity. Each article walks through specific error messages with step-by-step diagnosis, root cause analysis, and verified solutions. Whether you're dealing with configuration problems, authentication failures, timeout errors, or unexpected behavior, these guides are designed to get you from error message to resolution as quickly as possible. Solutions are backed by official documentation and real-world production experience.

Error Quick Reference

Article	Description
How to Fix 502 Bad Gateway and 504 Gateway Time Out Errors in Nginx	Master Nginx 502 Bad Gateway and 504 Gateway Time Out errors. Learn to diagnose upstream timeouts, adjust proxy_pass settings, and fix backend crashes.
How to Fix Nginx 502 Bad Gateway: A Complete Troubleshooting Guide	Experiencing an Nginx 502 Bad Gateway or 504 Timeout? Learn how to diagnose and fix upstream connection refused, reset, and SSL handshake errors effectively.
How to Fix nginx 502 Bad Gateway: Complete Troubleshooting Guide	Fix nginx 502 Bad Gateway fast. Diagnose upstream crashes, PHP-FPM socket mismatches, proxy timeouts, and SSL handshake failures with real commands.