IIS6
<system.web>
<httpRuntime executionTimeout="3600" maxRequestLength="2097151" />
</system.web>
executionTimeout단위 초
maxRequestLength 단위 MB
IIS7에서는 추가적으로 명시
<system.webServer>
<security>
<requestFiltering>
<requestLimits maxAllowedContentLength="2000000000" />
</requestFiltering>
</security>
</system.webServer>
maxAllowedContentLength 단위 Byte
-- 예제
관리자는 2GB까지 허용, 사용자는 20MB까지 허용
<location path="/admin">
<system.webServer>
<security>
<requestFiltering>
<requestLimits maxAllowedContentLength="2000000000" />
</requestFiltering>
</security>
</system.webServer>
</location>
<location path="/user">
<system.webServer>
<security>
<requestFiltering>
<requestLimits maxAllowedContentLength="20000000" />
</requestFiltering>
</security>
</system.webServer>
</location>
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https://technet.microsoft.com/ko-kr/library/hh529949(v=exchg.150).aspx