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   ExtensionlessUrlHandler-Integrated-4.0
Error Code   0x00000000
Requested URL   http://sclasslimousine.com:80/related/a+-class?slt=1&slr=1&lpt=1&yt=qs%3d06oENya4ZG1YS6vOLJwpLiFdjG98_EiKsDm7V41_0FT-Zv4zgcyo68jrHJphHEdUMrKR6QGdSPTFp2nNhJlX33L8r-UphQMEgsZ83rrjTZJNii5clAfA1o-RMvIsayfo4ntzS4sJtnIPc5MX_sNuc7Y_eCkU1D0ME66SVAMkQ8-VIq7nS_Ve08tJh_jxNZyM3AoK7RScq_T19i439lmXV5Qa9SFqCEPDokxlGYGvZVE-9K1IhgW-_8G61h5EVQhi9rXkfhbAgGsnajU97uJQ..%2cYT0xO0w9QSsgQ2xhc3M7Uj0xO1M9I3RhYXNfZGFyd2luLSNpQztrPTI7aD01NDUzOTc3NDI0ZDAwZmY1
Physical Path   D:\inetpub\wwwroot\related\a+-class
Logon Method   Not yet determined
Logon User   Not yet determined
Request Tracing Directory   D:\LogFiles\FailedReqLogFiles

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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