497 HTTP Request Sent to HTTPS Port

The 497 HTTP response status code means that a non-secure HTTP request was mistakenly sent to the secure HTTPS port.

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Introduction
In Action
Sample
Conclusion

Introduction

When the server returns the HTTP status code 497 HTTP Request Sent to HTTPS Port, it means that a non-secure HTTP request was mistakenly sent to the secure HTTPS port.

This is specific to nginx servers. To fix this error, make sure to use the appropriate HTTPS protocol when communicating with the server on its secure port.

In Action

When you encounter the HTTP status code 497 “HTTP Request Sent to HTTPS Port,” it means that the server cannot process the request because it was mistakenly sent to the HTTPS port instead of the correct HTTP port.

To resolve this error, you should resend the request either as an HTTPS request to the correct port or as an HTTP request to the appropriate port.

Note that search engines like Google will not index URLs with the 497 status code, and URLs that have been indexed in the past but now return this status code will be removed from the search results.

Conclusion

The 497 HTTP status code, “HTTP Request Sent to HTTPS Port,” occurs when a client mistakenly sends an HTTP request to the server’s HTTPS port.

The server refuses to process the request in such cases. To fix this error, the client should resend the request using the appropriate protocol (HTTP or HTTPS) to the correct port.