Use the Allow Command or Deny Command dialog box to add an FTP command to the list of commands for which the FTP service will either allow or deny access.
Using this feature incorrectly can prevent access to your server. For example, if you deny access to the USER and PASS commands, users will not be able to log in to your FTP server.
UI Element List
Specifies the FTP command for which the FTP service will either allow or deny access.