How do I correct HTTP error codes?

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Introduction

Welcome to our documentation on HTTP error codes! HTTP error codes are standard messages used by web servers to indicate the status of an HTTP request made by a browser or client. Understanding these codes is essential for diagnosing and resolving problems encountered when accessing websites or using online applications. This documentation will guide you through the different types of HTTP error codes, their meanings and the actions you need to take to resolve them.

Lists of HTTP error codes

Here is a list of the most frequently encountered HTTP error codes:

401 Unauthorized

The HTTP 401 Unauthorized error means that access to the requested URL resource has not been authorised.

This error may occur if user authentication has not yet been provided or if the user has failed identification tests.

Please read our documentation specific to this error code to resolve the problem.

403 Forbidden

The HTTP 403 Forbidden error means that access to the requested URL resource is forbidden.

Authentication is not the issue here.

This error may be caused by a script or file permissions problem.

Please read our documentation specific to this error code to resolve the problem.

404 Not Found

The HTTP 404 Not Found error means that access to the URL resource has not been found.

Either the file requested has not been published, it is misspelled or it is not placed in the correct folder.

Please read our documentation specific to this error code to resolve the problem.

406 Not Acceptable

This is essentially a communication problem between the server and the browser or machine used to display the web application. The browser cannot interpret the data received because it does not meet certain requirements.

Please read our documentation specific to this error code to resolve the problem.

500 Internal Server Error

The HTTP 500 Internal Server Error means that the server has encountered an unexpected condition, preventing it from satisfying the visitor's request.

The server cannot then be more precise about the reason for the error when responding to the visitor.

Please read our documentation specific to this error code to resolve the problem.

502 Bad Gateway

The HTTP 502 Bad Gateway or 502 Proxy Error means that the response sent to an intermediate server by another server is incorrect.

This error can appear in various forms, for example: 502 Service Temporarily Overloaded, HTTP 502 , 502 Proxy Error etc.

This error is often caused by a network problem between the servers. A simple refresh of the page is sufficient to resolve it.

503 Service Unavailable

The HTTP 503 Service Unavailable error means that the server is unable to process the request due to server overload or maintenance.

This error occurs when the quotas for the chosen web hosting package are exceeded or when maintenance is in progress on the server.

The service is then reduced to a minimum, making the hosted website unavailable.

Please read our specific documentation for this error code to resolve the problem.

504 Gateway Timeout

The HTTP error 504 Gateway Timeout means that the timeout for accessing the gateway has expired.

This error can occur if several servers are used to access a page. The first server works normally but the destination server does not respond.

This problem can also be linked to server overload. The error is usually temporary.

509: Request quota exceeded

Error 509 generally corresponds to one or more IPs exceeding their web request quota within a given time.

This error is generally temporary.

Here is some documentation on this type of error:

Error 509 - OL-CONN-PER-IP

Error 509 - OL-RATE

509 Error - OL-RATE-PER-IP

Error 509 - OL-CONN

Error 509 - OL-CONN-PROXY-PER-IP

Error 509 - OL-CONN-PROXY-CONN

512

Error 512 corresponds to an IP block following requests considered bad by our firewall.

This error is generally temporary.

Here is some documentation on this type of error:

Error 512 - OL-BLACKLIST-IP

Error512 - OL-BADRATE-PER-IP

Conclusion

You now know how to :

• Identify and understand the meaning of the various common HTTP error codes.
• Take appropriate action to resolve problems related to 401 Unauthorized, 403 Forbidden, 404 Not Found, 406 Not Acceptable, 500 Internal Server Error, 502 Bad Gateway, 503 Service Unavailable, 504 Gateway Timeout, and 509 quota overrun errors.
• Understand the potential causes of errors and the solutions specific to each case, thanks to our detailed documentation.
• Recognise temporary errors and know when a simple page refresh may be all that's needed to resolve them.
• Take effective action in the event of network problems or server overload causing errors such as 502 Bad Gateway or 504 Gateway Timeout.
• Identify 509 and 512 type errors linked to request quotas or IP blocking by the firewall.

If you know how to interpret these error codes, you'll be well equipped to navigate the sometimes complex world of the web with confidence, and keep your sites up and running smoothly 🌐🛠️.

Thank you for following our guide! Your feedback and comments are invaluable in helping us to continually improve our resources. Don't hesitate to share your experiences or ask questions if you need more information or additional help 👍💬.