Internet Information Services 7.0

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
HandlerPageHandlerFactory-ISAPI-2.0
Error Code0x00000000
Requested URLhttp://redthebook.com:80/cs/blogs/saskiab/archive/tags/saskiab/sorry+everyone+if+this+information+isn_2700_t+factual_2100_+it_2700_s+just+how+i+remember+it/default.aspx
Physical PathE:\web\redthebookc\htdocs\cs\blogs\saskiab\archive\tags\saskiab\sorry+everyone+if+this+information+isn_2700_t+factual_2100_+it_2700_s+just+how+i+remember+it\default.aspx
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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