IIS 7 + The server or proxy not found

This is a small post to help people out that have issues with uploading large files using the Aurigma Image Uploader in a ASP.NET + IIS 7 environment.

We have recently migrated our application to a new Windows 2008 server and ran into problems when uploading large files (over 30Mb) using the Aurigma Image Uploader. After uploading the large file the Image Uploader would return an error message like this "The server or proxy "some file name.aspx" not found". Since we did not have this problem before I figured it had something to do with IIS 7.

So I started Googling and found this article from Microsoft: http://support.microsoft.com/kb/944981.

Turns out that in IIS 7 the maximum content length is capped on 30Mb. You can override this setting by adding the following lines to your web.config file:

<system.webserver>
    <security>
        <requestFiltering>
            <!-- Set  the maximum allowed content length to 2Gb //-->
            <requestLimits maxAllowedContentLength="2147483648"/>
        </requestFiltering>
    </security>
</system.webServer>

Hopefully this will help other users experiencing similar problems.

Cheers,

Maurits