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/16077/H%E1%BB%8Dc%20l%E1%BA%ADp%20tr%C3%ACnh%20C%20cho%20ng%C6%B0%E1%BB%9Di%20m%E1%BB%9Bi%20b%E1%BA%AFt%20%C4%91%E1%BA%A7u
Physical Path   C:\webspace\stanford.com.vn\httpdocs\kien-thuc-lap-trinh\tin-chi-tiet\cagId\42\id\16077\H%E1%BB%8Dc%20l%E1%BA%ADp%20tr%C3%ACnh%20C%20cho%20ng%C6%B0%E1%BB%9Di%20m%E1%BB%9Bi%20b%E1%BA%AFt%20%C4%91%E1%BA%A7u
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.

View more information »