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Asked: 2026-06-13T16:25:58+00:00

Here’s where I’m setting maxRequestLength to 2GB (the max value), which indicates the maximum

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Here’s where I’m setting maxRequestLength to 2GB (the max value), which indicates the maximum request size supported by ASP.NET:

<system.web>
    <httpRuntime maxRequestLength="2097151" executionTimeout="3600"/>
    ...

and here I’m setting the maxAllowedContentLength to 4GB (the max value), which specifies the maximum length of content in a request supported by IIS

<system.webServer>
    <security>
        <requestFiltering>
            <requestLimits maxAllowedContentLength="4294967295"/>
        </requestFiltering>
    </security>
    ...

I’d like to be able to upload files up to 4GB, but I’m limited by the maxRequestLength field.

I noticed that this third party upload tool (http://www.element-it.com/onlinehelp/webconfig.html) has a ignoreHttpRuntimeMaxRequestLength property, which allows it to upload files up to 4GB.

Does anyone know if I can ignore the maxRequestLength value like this other upload tool does?

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1 Answer

  1. Editorial Team

    Considering the Type of MaxRequestLength is a Int, at the moment there is no way to parse a value higher than Int.Max correctly.

    I heard they might be increasing IIS8 but nothing concrete from Microsoft as of yet. The only way I’ve seen in .Net 4.5 is to use HttpRequest.GetBufferlessInputStream which

    Gets a Stream object that can be used to read the incoming HTTP entity body, optionally disabling the request-length limit that is set in the MaxRequestLength property.

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