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   StaticFile
Error Code   0x00000000
Requested URL   http://famu.vn:80/1877/886/%E3%83%99%E3%83%88%E3%83%8A%E3%83%A0%E4%BA%BA%E6%9D%90%E7%B4%B9%E4%BB%8B%E3%81%AB%E3%81%A4%E3%81%84%E3%81%A6%E3%81%94%E6%A1%88%E5%86%85%E8%87%B4%E3%81%97%E3%81%BE%E3%81%99%E3%80%82.html
Physical Path   D:\server94\famu\1877\886\%E3%83%99%E3%83%88%E3%83%8A%E3%83%A0%E4%BA%BA%E6%9D%90%E7%B4%B9%E4%BB%8B%E3%81%AB%E3%81%A4%E3%81%84%E3%81%A6%E3%81%94%E6%A1%88%E5%86%85%E8%87%B4%E3%81%97%E3%81%BE%E3%81%99%E3%80%82.html
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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