nginx
nginx Status Codes
Non-standard HTTP status codes used by nginx that are not defined in the HTTP specification.
6 codes
4xx Client error 6 codes
- 444 Connection Closed Without Response nginx closed the connection without sending any response to the client. Used to deny requests from unwanted clients without giving them any information.
- 494 Request Header Too Large The client's request headers exceeded the buffer size configured by large_client_header_buffers. nginx rejects the request before it reaches the upstream.
- 495 SSL Certificate Error An error occurred while verifying the client's SSL certificate. Used internally by nginx when logging; the client receives a 400 response.
- 496 SSL Certificate Required The client did not provide a required SSL certificate. Used internally by nginx when logging; the client receives a 400 response.
- 497 HTTP Request Sent to HTTPS Port A plain HTTP request was received on a port configured for HTTPS. nginx logs this code internally; the client receives a 400 response.
- 499 Client Closed Request The client closed the connection before nginx could send a response. Common when a client times out or navigates away during a slow upstream request.