Error pages will not be cached, therefore only 200, 301, and 302 responses will be cached. KeyCDNs error pages show either a gray or blue background color. All other error pages are coming from your origin server.
400 – Bad Request
In most of the cases a malformed HTTP request (e.g. empty requests by load balancers / health checks). A certain number is normal. Learn more about how to avoid a bad request.
403 – Forbidden
It is prohibited to access the requested asset. A possible reasons is a wrong URL or the secure token is not valid. Learn more about 403 Forbidden errors.
404 – Not Found
The content either does not exist or has been moved. Learn more about 404 Not Found errors.
405 – Not Allowed
The method is not allowed. Only GET and HEAD are allowed. Learn more about 405 Method Not Allowed errors.
410 – Gone
The secure token has expired.
451 – Unavailable For Legal Reasons
A bad bot which is blocked hits a KeyCDN edge server.
500 – Origin Not Reachable
Our edge server was not able to pull the content from your origin server. Either your origin server is not reachable or firewall rules prevented the connection. The status code 500 is a generic error message, which is thrown if there is a 502 Bad Gateway or a 504 Gateway Timeout.
503 – Zone Not Found
The requested zone does not exists or has not yet been distributed. Another reason is using SSL on a non SSL enabled zone. This error appears alternating with 403 or 404 error codes.