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   PageHandlerFactory-Integrated-4.0
Error Code   0x00000000
Requested URL   http://www.cbcm.org:80/newsandevent/Taiwan%20Native%20Children%20Choir%20%E5%8F%B0%E7%81%A3%E5%85%AD%E9%BE%9C%E9%84%95%E5%8E%9F%E4%BD%8F%E6%B0%91%E5%85%92%E7%AB%A5%E5%90%88%E5%94%B1%E5%9C%98_e2920.aspx
Physical Path   D:\APPS\cbcmDNN\webroot\newsandevent\Taiwan%20Native%20Children%20Choir%20%E5%8F%B0%E7%81%A3%E5%85%AD%E9%BE%9C%E9%84%95%E5%8E%9F%E4%BD%8F%E6%B0%91%E5%85%92%E7%AB%A5%E5%90%88%E5%94%B1%E5%9C%98_e2920.aspx
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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