If you are a website owner, you have probably come across error codes while using the Internet Information Services (IIS) server. These error codes are also known as SC-WIN32-Status codes and they provide valuable information about the status of your server and the requests that it receives.
In this article, we will explore the different types of SC-WIN32-Status codes and their meanings. Understanding these codes can help you troubleshoot and resolve issues with your website's performance.
What is IIS?
Before diving into the status codes, let's first understand what IIS is. IIS is a web server created by Microsoft that runs on Windows operating systems. It is used to host websites and web applications and is one of the most popular web servers in use today.
IIS SC-WIN32-Status Codes
SC-WIN32-Status codes are numerical values that are returned by the IIS server in response to a request from a client. These codes are divided into categories based on their first number, which ranges from 1 to 5. These categories are:
1xx - Informational
2xx - Success
3xx - Redirection
4xx - Client errors
5xx - Server errors
Let's take a closer look at each of these categories and the codes within them.
1xx - Informational
The 1xx codes are used to provide information about the request being processed. These codes are not common in IIS and are mostly used for HTTP/2 protocol. Some of the common 1xx codes are:
101 - Switching Protocols: This code indicates that the server is switching protocols in response to the client's request.
103 - Early Hints: This code is used to indicate that the server is sending a response header before the final response is available.
2xx - Success
The 2xx codes indicate that the request was successfully received, understood, and accepted by the server. These codes are commonly seen in IIS and some of the common ones are:
200 - OK: This is the most common code and it indicates that the request was successful.
201 - Created: This code indicates that a new resource has been created as a result of the request.
204 - No Content: This code indicates that the request was successful, but there is no content to return.
3xx - Redirection
The 3xx codes are used to indicate that the requested resource has moved to a different location. The client is usually redirected to the new location. Some of the common 3xx codes are:
301 - Moved Permanently: This code indicates that the requested resource has been permanently moved to a new location.
302 - Found: This code indicates that the requested resource has been temporarily moved to a new location.
304 - Not Modified: This code is used to indicate that the requested resource has not been modified since the last request.
4xx - Client Errors
The 4xx codes are used to indicate that there was an error on the client's side. These codes are usually caused by incorrect or invalid requests. Some of the common 4xx codes in IIS are:
400 - Bad Request: This code indicates that the server cannot process the request due to a client error.
403 - Forbidden: This code indicates that the server is refusing to fulfill the request, usually due to lack of permission.
404 - Not Found: This code indicates that the requested resource could not be found on the server.
5xx - Server Errors
The 5xx codes are used to indicate that there was an error on the server's side. These codes are usually caused by server-side issues and can be temporary or permanent. Some of the common 5xx codes in IIS are:
500 - Internal Server Error: This code indicates that there was an unexpected error on the server's side.
503 - Service Unavailable: This code indicates that the server is temporarily unable to handle the request due to maintenance or high traffic.
504 - Gateway Timeout: This code indicates that the server did not receive a response from the upstream server within the specified time.
Conclusion
In conclusion, IIS SC-WIN32-Status codes provide valuable information about the status of your server and the requests it receives. Understanding these codes can help you identify and troubleshoot issues with your website's performance. We hope this article has helped you gain a better understanding of these codes and their meanings.
