522 Connection Timed Out
The HTTP response status code
522 is an unofficial HTTP status code specific to Cloudflare.
522 error occurs when Cloudflare times out contacting the origin web server. Two different timeouts cause HTTP error
522 depending on when they occur between Cloudflare and the origin web server:
- Before a connection is established, the origin web server does not return a
SYN+ACKto Cloudflare within 15 seconds of Cloudflare sending a
- After a connection is established, the origin web server doesn’t acknowledge (
ACK) Cloudflare’s resource request within 90 seconds.