Question
What is the difference between a 521 and a 522 error?
Asked by: USER8452
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53 Answers
Answer (53)
A 521 error indicates that Cloudflare cannot connect to your origin server at all, meaning the server is down or unreachable. A 522 error, on the other hand, signifies that Cloudflare can connect, but your origin server does not respond within the time allowed.