I'm allowing users to upload a file, using radUpload in one of my applications. In production, when I upload a file more than 30mb, I get the following error immediately:
403: Access Forbidden
Due to the presence of characters known to be used in Cross Site Scripting attacks, access is forbidden. This web site does not allow Urls which might include embedded HTML tags.
I have verified that it's not the file name. I have created two files called "myUpload20.zip" (20mb) and "myUpload40.zip" (40mb). The 20 mb uploads fine. I can't replicate it in Dev and UAT environment. In these environment, I am able to upload files over 40mb with no issues. I have verified the web.configs in all 3 and they all have:
<!--file upload size 100mb : 30 min-->
httpRuntime maxRequestLength="102400" executionTimeout="1800" />
Is this a server issue? Any ideas how I can eliminate the error?