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   ExtensionlessUrl-Integrated-4.0
Error Code   0x00000000
Requested URL   https://www.ocdchallenge.com:443/zh/%E4%B8%BB%E9%A1%B5/%E6%B3%A8%E5%86%8C/%E6%B3%A8%E5%86%8C-%E5%BC%80%E5%A7%8B?returnurl=https%253A%252F%252Fwww.ocdchallenge.com%252Fzh%252F%25E7%2599%25BB%25E5%25BD%2595
Physical Path   C:\data\projects\OCD\PRD\ocdchallenge.com\zh\%E4%B8%BB%E9%A1%B5\%E6%B3%A8%E5%86%8C\%E6%B3%A8%E5%86%8C-%E5%BC%80%E5%A7%8B
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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