Fix DNS Probe Finished NXDOMAIN on Router: Step-by-Step - Fix Nginx 502 Bad Gateway in Docker Alpine-Windows Defender Real-Time Protection Greyed Out: How to Fix

Updated 2026-07-28 08:30:59security-tools
Fix DNS Probe Finished NXDOMAIN on Router: Step-by-Step - Fix Nginx 502 Bad Gateway in Docker Alpine-Windows Defender Real-Time Protection Greyed Out: How to Fix
Before changing system settings, save your work and note the exact error text so you can compare results after each step.

Extra verification checklist

  • Restart the affected app after changing permissions or configuration files.
  • Test the same workflow in a clean browser profile or a temporary user account.
  • Compare the result on another network if the error may be connection related.