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Nginx 502 Bad Gateway: Troubleshooting Checklist - How to Resolve DNS Probe NXDOMAIN on Mac Chrome-Windows Update Connection Refused – Fixes That Work

2026-06-13 13:41:33
Nginx 502 Bad Gateway: Troubleshooting Checklist - How to Resolve DNS Probe NXDOMAIN on Mac Chrome-Windows Update Connection Refused – Fixes That Work

Result check

  • Keep one change per test run so you know which step helped.
  • Undo temporary changes after the issue is confirmed.

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