Terminal Services idle session time limit does not meet the requirement.

From Windows Vista Security Technical Implementation Guide

Part of TS/RDS - Time Limit for Idle Session

Associated with IA controls: ECSC-1

SV-16614r1_rule Terminal Services idle session time limit does not meet the requirement.

Vulnerability discussion

This setting controls how long a session may be idle before it is automatically disconnected from the server. Users should disconnect if they plan on being away from their terminals for extended periods of time. Idle sessions should be disconnected after 15 minutes.

Check content

Fix text

Configure the policy value for Computer Configuration -> Administrative Templates -> Windows Components -> Terminal Services -> Terminal Server -> Session Time Limits “Set time limit for active but idle Terminal Services sessions” to “Enabled”, and the “Idle session limit” set to 15 minutes or less, excluding 0 which equates to “Never”.

Pro Tips

Lavender hyperlinks in small type off to the right (of CSS class id, if you view the page source) point to globally unique URIs for each document and item. Copy the link location and paste anywhere you need to talk unambiguously about these things.

You can obtain data about documents and items in other formats. Simply provide an HTTP header Accept: text/turtle or Accept: application/rdf+xml.