Fix Cloudflare Origin Certificate Not Trusted by Browser - Troubleshooting Nginx Duplicate Listen Directive-Fix ERR_NAME_NOT_RESOLVED in Chrome with Google DNS

Updated 2026-07-28 14:37:25security-tools
Fix Cloudflare Origin Certificate Not Trusted by Browser - Troubleshooting Nginx Duplicate Listen Directive-Fix ERR_NAME_NOT_RESOLVED in Chrome with Google DNS
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.