HTTP Error 404.11 - Not Found

The request filtering module is configured to deny a request that contains a double escape sequence.

Most likely causes:

  • The request contained a double escape sequence and request filtering is configured on the Web server to deny double escape sequences.

Things you can try:

  • Verify the configuration/system.webServer/security/requestFiltering@allowDoubleEscaping setting in the applicationhost.config or web.confg file.

Detailed Error Information:

Module   RequestFilteringModule
Notification   BeginRequest
Handler   ExtensionlessUrlHandler-Integrated-4.0
Error Code   0x00000000
Requested URL   https://www.mceducation.com.hk:443/stemwp/%E3%80%8C%E5%8B%95%E6%89%8B%E5%81%9A%E3%80%8D%E9%AB%94%E9%A9%97stem%E7%9A%84%E6%A8%82%E8%B6%A3%E6%9A%A8%E3%80%8C%E5%AD%B8%E6%A0%A1%E8%81%AF%E7%9B%9F%E8%A8%88%E5%8A%83%E3%80%8D%E7%99%BC%E4%BD%88/?lang=zh-hant
Physical Path   E:\www.marshallcavendish.com.hk\stemwp\%E3%80%8C%E5%8B%95%E6%89%8B%E5%81%9A%E3%80%8D%E9%AB%94%E9%A9%97stem%E7%9A%84%E6%A8%82%E8%B6%A3%E6%9A%A8%E3%80%8C%E5%AD%B8%E6%A0%A1%E8%81%AF%E7%9B%9F%E8%A8%88%E5%8A%83%E3%80%8D%E7%99%BC%E4%BD%88\
Logon Method   Not yet determined
Logon User   Not yet determined

More Information:

This is a security feature. Do not change this feature unless the scope of the change is fully understood. You should take a network trace before changing this value to confirm that the request is not malicious. If double escape sequences are allowed by the server, modify the configuration/system.webServer/security/requestFiltering@allowDoubleEscaping setting. This could be caused by a malformed URL sent to the server by a malicious user.

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