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-ISAPI-4.0_32bit
Error Code   0x00000000
Requested URL   http://www.snamipa.it:80/2022/01/%F0%9D%90%92%F0%9D%90%8E%F0%9D%90%8D%F0%9D%90%83%F0%9D%90%80%F0%9D%90%86%F0%9D%90%86%F0%9D%90%88%F0%9D%90%8E-%F0%9D%90%92%F0%9D%90%94%F0%9D%90%8B%F0%9D%90%8B%F0%9D%90%84-%F0%9D%90%82%F0%9D%90%8E/
Physical Path   D:\inetpub\webs\snamipait\2022\01\%F0%9D%90%92%F0%9D%90%8E%F0%9D%90%8D%F0%9D%90%83%F0%9D%90%80%F0%9D%90%86%F0%9D%90%86%F0%9D%90%88%F0%9D%90%8E-%F0%9D%90%92%F0%9D%90%94%F0%9D%90%8B%F0%9D%90%8B%F0%9D%90%84-%F0%9D%90%82%F0%9D%90%8E\
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.

View more information »