This policy specifies whether to prevent the redirection of data to client LPT ports during a Remote Desktop Services session. You can use this setting to prevent users from mapping local LPT ports and redirecting data from the remote computer to local LPT port peripherals. If a value is configured to Disabled or Not Configured, the attacker can leverage it to map the client’s LPT ports. In addition, he can use the port to redirect data from the Terminal Server to the local LTP ports.