What is the maximum size of post requests to IIS? - Eugene Siu's Thoughts on Security - Site Home

ASP applications are protected, but what happens to non-ASP requests? Currently, there is no limit.
MaxRequestEntityAllowed is currently not set, but ASPMaxRequestEntityAllowed is set to 200k

ASP is simply a type of ISAPI, so obviously, the more restrictive of the two will apply for ASP.

MaxRequestEntityAllowed
http://msdn.microsoft.com/library/en-us/iissdk/iis/ref_mb_maxrequestentityallowed.asp

ASPMaxRequestEntityAllowed
http://msdn.microsoft.com/library/en-us/iissdk/iis/ref_mb_aspmaxrequestentityallowed.asp

Check out C:\WINDOWS\system32\inetsrv\MetaBase.xml for the values on your box.

You cannot POST to a static file, so limit is effectively 0.