How to Fix Cloudflare 521 Error with Firewall Settings
If you see a 521 Web Server Is Down error when visiting your site through Cloudf...
Software troubleshooting desk
Practical fixes for tool errors, setup blocks, and workflow issues.
Symptom
Cause
Fix route
Verify
Fresh repair notes
All notesFixing Nginx Upstream Connection Refused in Load Balancing
When Nginx load balancing returns upstream connection refused, it means one or more ...
Python Requests: Setting Timeout for POST Requests
When your Python script makes a POST request to an external API or web service, a slow or unrespo...
Fixing Git Authentication Failed in VS Code
If you see "git authentication failed" when pulling, pushing, or cloning in VS Code, the ...
Cloudflare Origin Certificate Not Showing in Dashboard: Fix
If you've generated a Cloudflare origin certificate but it doesn't appear in your dashboa...
Cloudflare DNS Setup Propagation Not Completing: Fixes
You've updated your DNS records at Cloudflare, but hours later the changes still aren't s...
Issue queue
SitemapChrome Extensions Not Loading on Mac? Here's How to Fix It
How to bypass pip externally-managed-environment on Ubuntu 23.04
Docker Build Context Canceled on Windows 10 Fix
Nginx Port 80 Connection Refused: Causes and Fixes
Chrome Reset Caused Crash? Troubleshooting Guide
Windows 11 Bluetooth Reset Guide
ERR_NAME_NOT_RESOLVED Troubleshooting Steps
Windows Remote Desktop Broken After Update? Fix It
Disable Problematic Shell Extensions to Prevent Explorer Restarts
Fix Windows Update Error 0x800f081f: Repair Tool Steps
Resolve Git Fast-Forward Merge Error
Stop Nginx Redirect Loop with These Checks
How to bypass pip externally-managed-environment on Ubuntu 23.04
Docker Build Context Canceled on Windows 10 Fix
Nginx Port 80 Connection Refused: Causes and Fixes
Chrome Reset Caused Crash? Troubleshooting Guide
Windows 11 Bluetooth Reset Guide
ERR_NAME_NOT_RESOLVED Troubleshooting Steps
Windows Remote Desktop Broken After Update? Fix It
Disable Problematic Shell Extensions to Prevent Explorer Restarts
Fix Windows Update Error 0x800f081f: Repair Tool Steps
Resolve Git Fast-Forward Merge Error
Stop Nginx Redirect Loop with These Checks