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://www.harvardpress.com:443/Opinion/Letters-to-the-Editor/ArtMID/4537/ArticleID/17622/Harvard-Woman%E2%80%99s-Club-to-kick-off-105th-year-with-talk-by-Ted-Maxant
Physical Path   C:\Inetpub\vhosts\harvardpress.com\httpdocs\Opinion\Letters-to-the-Editor\ArtMID\4537\ArticleID\17622\Harvard-Woman%E2%80%99s-Club-to-kick-off-105th-year-with-talk-by-Ted-Maxant
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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