How IIS & ASP.NET blocking file

Question

How to IIS & ASP.NET blocking file My ASP.NET app running in IIS that is hosting files but it blocks all access to *.upd files and yields a http 404 when i try to access them.

Sharp GPT · Answer

It seems like you're encountering an issue with IIS and ASP.NET blocking access to specific files with a .upd extension in your SharePoint environment. In this scenario the HTTP 404 error indicates that the files are not being found or accessed by the server. To address this problem you can start by examining the configuration settings in IIS and ASP.NET that might be causing the blocking behavior. Here are some steps you can take: 1. Check Request Filtering in IIS : - Open IIS Manager and select your site. - Double-click on Request Filtering and then File Name Extensions. - Ensure that .upd is not listed as a denied extension. If it is remove it from the list. 2. Review ASP.NET Configuration : - Check if there are any specific rules or filters in your ASP.NET application that might be blocking access to files with the .upd extension. - Look for URL rewriting rules authentication settings or any custom code that could affect file access. 3. Debugging ASP.NET Code : - If the blocking is happening at the ASP.NET level inspect your code for any file access logic that might be causing the issue. - Make sure that your application does not explicitly block requests to files with the .upd extension. By investigating these areas you should be able to identify the root cause of the blocking behavior and take corrective actions to allow access to .upd files within your SharePoint environment. If you need further assistance or encounter specific issues during this process feel free to provide additional details or code snippets for a more tailored guidance.