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   ExtensionlessUrl-Integrated-4.0
Error Code   0x00000000
Requested URL   https://tongcucthuysan.gov.vn:443/vi-vn/T%E1%BB%95ng-c%E1%BB%A5c-Th%E1%BB%A7y-s%E1%BA%A3n/ctl/SendPassword?returnurl=%252Fvi-vn%252Fki%25E1%25BB%2583m-ng%25C6%25B0%252Fho%25E1%25BA%25A1t-%25C4%2591%25E1%25BB%2599ng-ki%25E1%25BB%2583m-ng%25C6%25B0%252Fdoc-tin%252F016303%252F2021-09-25%252FBanner+003
Physical Path   C:\www\vi-vn\T%E1%BB%95ng-c%E1%BB%A5c-Th%E1%BB%A7y-s%E1%BA%A3n\ctl\SendPassword
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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