Cloudflare error codes
22 codes — tap one for its meaning, causes, and fix steps.
- 1000Cloudflare's DNS resolution points to a prohibited or loopback IP address
- 1001DNS resolution failed for the requested hostname
- 1003Direct access to Cloudflare's IP address without a valid Host header is not permitted
- 1006The visitor's IP address has been banned by the site owner using a Cloudflare firewall rule
- 1007The visitor's IP address has been banned by the site owner using a Cloudflare firewall rule
- 1008The visitor's IP address has been banned by the site owner using a Cloudflare firewall rule
- 1009Access is denied because the visitor's country is blocked by a Cloudflare country-based firewall rule
- 1010Cloudflare detected that the browser's user-agent or request pattern matches a known malicious signature and blocked access
- 1012The website is unavailable in your region due to a Cloudflare access restriction or legal requirement
- 1014A CNAME record in one Cloudflare account points to a domain in a different Cloudflare account
- 1015The visitor is being rate limited by a Cloudflare Rate Limiting rule configured by the site owner
- 1016Cloudflare could not resolve the origin DNS hostname configured in the site's DNS settings
- 1018Cloudflare could not find a host matching the incoming request
- 1020Access was denied by a Cloudflare firewall rule or WAF managed rule on the site
- 1034The requested domain cannot be served because it is in a hold state pending verification or configuration
- 520The origin web server returned an empty
- 521The origin web server refused the connection from Cloudflare
- 522Cloudflare's connection to the origin timed out before receiving a response
- 523Cloudflare cannot route to the origin server because the origin IP address is unreachable
- 524A TCP connection was established but the origin did not send a response within Cloudflare's 100-second read timeout
- 525The SSL/TLS handshake between Cloudflare and the origin server failed
- 526Cloudflare could not validate the SSL certificate on the origin server