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://stanford.com.vn:443/kien-thuc-lap-trinh/tin-chi-tiet/cagId/42/id/16131/L%C3%A1%C2%BA%C2%ADp%20tr%C3%83%C2%ACnh%20vi%C3%83%C2%AAn%20c%C3%A1%C2%BA%C2%A7n%20ki%C3%A1%C2%BA%C2%BFn%20th%C3%A1%C2%BB%C2%A9c%20g%C3%83%C2%AC
Physical Path   C:\webspace\stanford.com.vn\httpdocs\kien-thuc-lap-trinh\tin-chi-tiet\cagId\42\id\16131\L%C3%A1%C2%BA%C2%ADp%20tr%C3%83%C2%ACnh%20vi%C3%83%C2%AAn%20c%C3%A1%C2%BA%C2%A7n%20ki%C3%A1%C2%BA%C2%BFn%20th%C3%A1%C2%BB%C2%A9c%20g%C3%83%C2%AC
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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