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.travelplus.com.tw:80/blog/2011/06/%e5%87%ba%e5%9c%8b%e6%97%85%e9%81%8a%e8%a1%8c%e6%9d%8e%e6%b8%85%e5%96%ae%e5%88%86%e4%ba%ab-%e6%89%93%e5%8c%85%e8%a1%8c%e6%9d%8e%e5%85%8d%e7%85%a9%e6%83%b1.html
Physical Path   D:\travelplus\blog\2011\06\%e5%87%ba%e5%9c%8b%e6%97%85%e9%81%8a%e8%a1%8c%e6%9d%8e%e6%b8%85%e5%96%ae%e5%88%86%e4%ba%ab-%e6%89%93%e5%8c%85%e8%a1%8c%e6%9d%8e%e5%85%8d%e7%85%a9%e6%83%b1.html
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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