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://www.rubesneri.it:80/CATALOGO_2012/DATA/2_L%27ASSOCIAZIONE/3_CATALOGO/4.2_ESTERI/5.2_LETTERE%20(ESTERI)/5.2.7_(K)/6.2.15_(KLAGENFURT)/7.2.15_(FELSENKELLER)/FELSENKELLER_1.html
Physical Path   D:\inetpub\webs\rubesneriit\CATALOGO_2012\DATA\2_L%27ASSOCIAZIONE\3_CATALOGO\4.2_ESTERI\5.2_LETTERE%20(ESTERI)\5.2.7_(K)\6.2.15_(KLAGENFURT)\7.2.15_(FELSENKELLER)\FELSENKELLER_1.html
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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