InformationThis policy setting specifies whether to prevent the redirection of data to client LPT ports during a Remote Desktop Services session.
The recommended state for this setting is: Enabled.
In a more security-sensitive environment, it is desirable to reduce the possible attack surface. The need for LPT port redirection within a Remote Desktop session is very rare, so makes sense to reduce the number of unexpected avenues for data exfiltration and/or malicious code transfer.
SolutionTo establish the recommended configuration via GP, set the following UI path to Enabled:
Computer Configuration\Policies\Administrative Templates\Windows Components\Remote Desktop Services\Remote Desktop Session Host\Device and Resource Redirection\Do not allow LPT port redirection
Note: This Group Policy path is provided by the Group Policy template TerminalServer.admx/adml that is included with all versions of the Microsoft Windows Administrative Templates.
Users in a Remote Desktop Services session will not be able to redirect server data to local (client) LPT ports.
Disabled. (Remote Desktop Services allows LPT port redirection.)