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://www.adelfors.nu:80/skype:+46708967104?sms&origin=%7B%27agent%27%3A%27FFTB%2F7.3.16540.9015%27%2C%27browser%27%3A%27mozilla%2F32.0%27%2C%27fingerprint%27%3A%27%7B00A4C5DE-6285-40E2-BB1F-7BECDF0C2F99%7D%27%2C%27uiid%27%3A%270%27%2C%27number_type%27%3A%27SPNR%27%2C%27url%27%3A%27http%3A%2F%2Fweb.u2884922.fsdata.se%2Fumbraco%2FeditContent.aspx%27%7D
Physical Path   D:\Home\u\u2884922\www\skype:+46708967104
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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