In Windows 7 (IIS 7.5), Windows Server 2008 (IIS 7.0), and Windows Server 2003 (IIS 6.0), the default settings are particularly strict and secure. This minimizes potential attacks that could result from overly permissive timeouts and limits in earlier versions.
The allowed size for the entity body of an ASP request is set to 200,000 bytes (204,800 for IIS 6.0). In versions prior to IIS 6.0, such as Windows XP (IIS 5.1), there was no limit.
This means file uploads cannot exceed 200k. In fact, no submitted data can exceed 200k. If you try posting a very long article, you will encounter this error as well.
How to Modify This in IIS 7.0:
1. Open IIS Manager → Double-click “ASP” under “IIS” → Open “Configure ASP Application Properties” → Expand “Limits Properties”;
2. Modify the value for “Maximum Requesting Entity Body Limit”. The default is 200000 (just under 200KB);
3. Change it to your desired size, for example: 52000000 (50MB);
4. Click “Apply” once done, and that’s it!
Addendum: The Real Fix for Large File Uploads in IIS 7
1. Open “Internet Information Services (IIS) Manager”;
2. Stop the IIS service;
3. Double-click “Default Web Site“ → Double-click “Request Filtering” in the middle pane → Click “Edit Feature Settings” in the right pane → Modify “Maximum allowed content length” under “Request Limits”. The default is 30M; change it to a larger value, like 300M, and click “OK”;
4. Restart IIS and try uploading again. 50M and 90M files should now work.
How to Modify This in IIS 6.0:
1. In IIS, right-click “Local Computer” and select “Properties”. Check “Enable Direct Metabase Edit”;
2. Stop the “IIS Admin Service” service from Services;
3. Navigate to c:/windows/system32/inetsrv/ and open the “MetaBase.xml” file. Find “AspMaxRequestEntityAllowed ” and change it to the desired value. The default is 204800, which is 200k; change it to 51200000 (50MB);
4. Then restart the “IIS Admin Service" service.
In IIS 6.0, if you cannot download attachments larger than 4M, follow these steps to fix it:
1. First, stop the iis admin service in Services.
2. Find the metabase.xml file located in windows