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://bio.hnue.edu.vn:443/%C4%90%C3%A0o-t%E1%BA%A1o/Th%C3%B4ng-b%C3%A1o/p/huong-dan-ve-viec-hoc-vuot-mot-so-hoc-phan-dao-tao-trinh-do-thac-si-doi-voi-sinh-vien-cua-truong-dai-hoc-su-pham-ha-noi-6715
Physical Path   D:\bio2.hnue.edu.vn\%C4%90%C3%A0o-t%E1%BA%A1o\Th%C3%B4ng-b%C3%A1o\p\huong-dan-ve-viec-hoc-vuot-mot-so-hoc-phan-dao-tao-trinh-do-thac-si-doi-voi-sinh-vien-cua-truong-dai-hoc-su-pham-ha-noi-6715
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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