521 Web Server Is Down
![Web Server Is Down](/images/521.jpg)
Description
The HTTP response status code 521 Web Server Is Down
is an unofficial HTTP status code specific to Cloudflare.
This error occurs when the origin web server refuses connections from Cloudflare.
The HTTP response status code 521 Web Server Is Down
is an unofficial HTTP status code specific to Cloudflare.
This error occurs when the origin web server refuses connections from Cloudflare.