This INTEGER object (enable or disable) would normally indicate whether additional user authentication is required, but the desc explicitly notes the Authenticate attribute does not apply to this kind of application, since the Plug proxy is a generic pass-through for arbitrary TCP applications rather than one with its own login semantics. An administrator would leave this object at whatever its default is since setting it has no real effect for Plug-proxied traffic. For example, an admin configuring a Plug policy for a proprietary internal application would not rely on this object to add any authentication step.