Server Unreachable at domain

I keep getting these errors throughout the day and not sure what the problem is and how to correct it. I would be grateful to anyone who can assist me.

Error 521: Web server is down

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.

See attached image from the emails I receive.


The text you post describes several possible reasons. Here’s a Community Tip on it:

Thank you! I can read this over and contact my hosting provider to see if something needs changed around.

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