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522 5xx Cloudflare custom

Connection Timed Out

Cloudflare-specific. Connection to origin timed out (TCP-level).

What HTTP 522 means

Cloudflare 522: Cloudflare couldn't establish a TCP connection to origin within the timeout. Origin overloaded, network ACL blocking Cloudflare, or origin geographically distant from Cloudflare's edge.

Typical causes

  • Origin overloaded
  • Network ACL blocking Cloudflare
  • Origin behind slow link