Internet Information Services 7.5

Error Summary

HTTP Error 404.11 - Not Found

The request filtering module is configured to deny a request that contains a double escape sequence.

Detailed Error Information
ModuleRequestFilteringModule
NotificationBeginRequest
HandlerExtensionlessUrlHandler-Integrated-4.0
Error Code0x00000000
Requested URLhttp://khoackdl.vuted.edu.vn:88/tin-tuc-144/C%C4%90%20C%C3%B4ng%20ngh%E1%BB%87%20k%E1%BB%B9%20thu%E1%BA%ADt%20%C4%90i%E1%BB%87n-%C4%90i%E1%BB%87n%20t%E1%BB%AD-2887
Physical PathC:\Web\VUTED\tin-tuc-144\C%C4%90%20C%C3%B4ng%20ngh%E1%BB%87%20k%E1%BB%B9%20thu%E1%BA%ADt%20%C4%90i%E1%BB%87n-%C4%90i%E1%BB%87n%20t%E1%BB%AD-2887
Logon MethodNot yet determined
Logon UserNot yet determined
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.
Links and 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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