NGINX

NGINX Status Codes

Showing 5 status codes

NGINX-specific HTTP status codes are proprietary extensions used by the NGINX web server to provide more detailed information about connection and SSL/TLS issues. These codes (495-499) are not part of the official HTTP specification but are widely encountered in NGINX deployments.

The most common NGINX codes are 499 Client Closed Request (client disconnected before receiving the response), 495 SSL Certificate Error (client certificate validation failed), 496 No Certificate (client didn't provide a required certificate), and 497 HTTP to HTTPS (plain HTTP request to an HTTPS port).

Understanding these codes is essential when debugging NGINX-based applications and infrastructure. They often appear in NGINX access logs and help identify issues with client connections, SSL/TLS configuration, and client certificate authentication.

🎫495nginxSSL Certificate ErrorYour security badge is fake! The server checked your SSL certificate and something's fishy. Expired? Forged? Either way, you're not getting in with that credential!
🎟️496nginxSSL Certificate RequiredWhere's your hall pass? This server requires a client certificate to enter, but you showed up empty-handed. No ticket, no entry!
🚪497nginxHTTP Request Sent to HTTPS PortWrong entrance! You tried to walk through the secure door without the secret handshake. This is the HTTPS-only entrance — go use the secure protocol!
🎫498nginxInvalid TokenYour ticket expired! Like showing up to a concert with last year's ticket. That token you're waving around? Not valid anymore, friend.
📞499nginxClient Closed RequestHello? Anyone there? You hung up before we could answer! Like calling customer service and rage-quitting before they pick up. We have your answer ready but you've already left!

NGINX Status Codes FAQ

What does NGINX 499 Client Closed Request mean?

NGINX 499 indicates that the client closed the connection before the server finished sending the response. Common causes include client timeouts, users navigating away, or network interruptions. This is logged by NGINX but never sent to clients.

Are NGINX status codes standard HTTP codes?

No, NGINX status codes (495-499) are proprietary extensions specific to NGINX and are not part of the official HTTP specification. They appear in NGINX logs to provide additional diagnostic information but are not sent to clients as part of HTTP responses.

How do I fix NGINX SSL certificate errors (495, 496)?

NGINX 495 and 496 errors relate to client certificate issues. Check that clients are providing valid certificates, verify the certificate chain is complete, ensure the CA certificate is correctly configured in NGINX, and confirm the ssl_verify_client directive is set appropriately.