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   http://www.cizanum.org:80/2018/01/09/%E5%A9%9A%E6%B4%BB%E5%88%91%E4%BA%8B%E3%82%92%E3%81%86%E3%81%BE%E3%81%8F%E4%BD%BF%E3%81%86%E3%80%81%E3%81%9F%E3%81%A3%E3%81%9F%E3%81%B2%E3%81%A8%E3%81%A4%E3%81%AE%E5%86%B4%E3%81%88%E3%81%9F%E3%82%84/
Physical Path   D:\inetpub\webs\redirect\2018\01\09\%E5%A9%9A%E6%B4%BB%E5%88%91%E4%BA%8B%E3%82%92%E3%81%86%E3%81%BE%E3%81%8F%E4%BD%BF%E3%81%86%E3%80%81%E3%81%9F%E3%81%A3%E3%81%9F%E3%81%B2%E3%81%A8%E3%81%A4%E3%81%AE%E5%86%B4%E3%81%88%E3%81%9F%E3%82%84\
Logon Method   Not yet determined
Logon User   Not yet determined
Request Tracing Directory   D:\LogFiles\FailedReqLogFiles

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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