Server Unreachable
Requests to the following origin have been failing for at least five minutes:
Check out this article from our help center:
Error 521 occurs when the origin web server refuses connections from Cloudflare. Security solutions at your origin may block legitimate connections from certain Cloudflare IP addresses.
The two most common causes of 521 errors are:
- Offlined origin web server application
- Blocked Cloudflare requests
Resolution
Contact your site administrator or hosting provider to eliminate these common causes:
- Ensure your origin web server is responsive
- Review origin web server error logs to identify web server application crashes or outages.
- Confirm Cloudflare IP addresses are not blocked or rate limited
- Whitelist all Cloudflare IP ranges in your origin web server's firewall or other security software
If you need additional background on this alert, review this Community Tip for details. For guidance resolving the issue, ask for advice and insight on the Community or contact Cloudflare Support.
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