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Cloudflare 521 Error: How to Check Server Logs - Resolve Nginx Redirect Loop Behind Cloudflare-Stop Nginx Redirect Loop Between HTTP and HTTPS

2026-07-28 12:11:00
Cloudflare 521 Error: How to Check Server Logs - Resolve Nginx Redirect Loop Behind Cloudflare-Stop Nginx Redirect Loop Between HTTP and HTTPS

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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