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Fix Nginx 502 Bad Gateway Behind Cloudflare - Windows Update 502 Bad Gateway DNS Fix-Troubleshooting RDP Error 0x4

2026-06-13 12:37:40developer-tools
Fix Nginx 502 Bad Gateway Behind Cloudflare - Windows Update 502 Bad Gateway DNS Fix-Troubleshooting RDP Error 0x4

Final checklist

  • Confirm that the same symptom is gone after a restart or refresh.
  • Keep the smallest working change and undo temporary diagnostic settings.