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   HTML Files (asp)
Error Code   0x00000000
Requested URL   http://www.autismcoalition.org:80/key/Vacation+Packages.html?qs=06oENya4ZGIyp-8Uy6VIwoU_Ez7loM9kQkH3fXm7ojor9kiTf0Pr8meyVAffooRQKK07pjNdQePmyOx7rQRhOG7IAn5vfkRA4kT4sC52kgolWOscEeTdbvaN6l72w7Q_6ZiDHOo5__j4TDcdU7E6QUzBcmIfty_OE4iEGKvfCuRqwCRrvXvQm31ktOjFkd_326jQ6tWyhNb0eZ5FImEvWyrurugEOtPawOVT0hbvoPnQld87_ZqTQGh8qFjjgqulSjYptpow..,YT0xO0w9VmFjYXRpb24gUGFja2FnZXM7Uj01O1M9Z2VuZXJpYw..
Physical Path   E:\web\mediains\key\Vacation+Packages.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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