How to set the maxAllowedContentLength to 500MB while running on IIS7?

Question

I changed the maxAllowedContentLength to

<security>     <requestFiltering>         <requestLimits maxAllowedContentLength="5024000000" />     </requestFiltering> </security> 

In my web.config, but when running on IIS7 I get this error:

The 'maxAllowedContentLength' attribute is invalid. Not a valid unsigned integer

but when I run in the VS server it run normally without any errors.

How to config my website to allow upload files with 500MB size, without this problem on IIS7?

Answer 1

According to MSDN maxAllowedContentLength has type uint, its maximum value is 4,294,967,295 bytes = 3,99 gb

So it should work fine.

See also Request Limits article. Does IIS return one of these errors when the appropriate section is not configured at all?

See also: Maximum request length exceeded

Answer 2

The limit of requests in .Net can be configured from two properties together:

First

• Web.Config/system.web/httpRuntime/maxRequestLength
• Unit of measurement: kilobytes
• Default value 4096 KB (4 MB)
• Max. value 2147483647 KB (2 TB)

Second

• Web.Config/system.webServer/security/requestFiltering/requestLimits/maxAllowedContentLength (in bytes)
• Unit of measurement: bytes
• Default value 30000000 bytes (28.6 MB)
• Max. value 4294967295 bytes (4 GB)

References:

• http://www.whatsabyte.com/P1/byteconverter.htm
• https://www.iis.net/configreference/system.webserver/security/requestfiltering/requestlimits

Example:

<location path="upl">    <system.web>      <!--The default size is 4096 kilobytes (4 MB). MaxValue is 2147483647 KB (2 TB)-->      <!-- 100 MB in kilobytes -->      <httpRuntime maxRequestLength="102400" />    </system.web>    <system.webServer>      <security>        <requestFiltering>                    <!--The default size is 30000000 bytes (28.6 MB). MaxValue is 4294967295 bytes (4 GB)-->          <!-- 100 MB in bytes -->          <requestLimits maxAllowedContentLength="104857600" />        </requestFiltering>      </security>    </system.webServer>  </location>