Use FTP Commands to define the list of commands for which the FTP service will either allow or deny access. Configuring specific commands allows Web server administrators to customize the list of FTP commands that the FTP service will allow, which you can use to tighten security on your server. For example, if you deny access to the FTP SYST command, you can prevent Internet clients from determining your server's operating system.
The Edit FTP Request Filtering Settings dialog box allows you to specify whether unlisted commands are allowed, which you can use to manually specify which commands are allowed.
Using the FTP Commands feature incorrectly can prevent access to your FTP server. For example, if you deny access to the USER or PASS commands, users will not be able to log in to your FTP server. In addition, even though you could specify that unlisted commands are not allowed in the Edit FTP Request Filtering Settings dialog box and use the Commands list to specify only the FTP commands that are allowed, this configuration is not recommended due to the complexity involved in specifying the correct list of FTP commands that are required for normal FTP operation.
UI Element List
The following tables describe the UI elements that are available on the feature page and in the Actions pane.
Feature Page Elements
Displays the FTP command for which the FTP service will either allow or deny access.
Displays the status of the FTP command, which will be either True if the FTP command is allowed, or False if the FTP command is denied.
Actions Pane Elements
Opens the Allow Command dialog box for you to add an FTP command to the list of allowed FTP commands.
Opens the Deny Command dialog box for you to add an FTP command to the list of denied FTP commands.
Removes an FTP command from the list.
Edit Feature Settings
Opens the Edit FTP Request Filtering Settings dialog box for you to configure general properties and FTP request limits.