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How to Fix Nginx Upstream Connection Refused on Port 80 - Fix Nginx 502 Bad Gateway with Docker Socket-Fix Cloudflare DNS Propagation for New Domains

2026-07-28 15:07:33
How to Fix Nginx Upstream Connection Refused on Port 80 - Fix Nginx 502 Bad Gateway with Docker Socket-Fix Cloudflare DNS Propagation for New Domains

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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