All Direct Access traffic must be routed through the internal network.

Overview

Finding ID	Version	Rule ID	IA Controls	Severity
V-21961	WN12-CC-000006	SV-53183r1_rule		Low

Description
Routing all Direct Access traffic through the internal network allows monitoring and prevents split tunneling.

STIG	Date
Windows Server 2012 / 2012 R2 Domain Controller Security Technical Implementation Guide	2016-12-19

Details

Check Text ( C-47489r1_chk )
If the following registry value does not exist or is not configured as specified, this is a finding: Registry Hive: HKEY_LOCAL_MACHINE Registry Path: \Software\Policies\Microsoft\Windows\TCPIP\v6Transition\ Value Name: Force_Tunneling Type: REG_SZ Value: Enabled

Fix Text (F-46109r1_fix)
Configure the policy value for Computer Configuration -> Administrative Templates -> Network -> Network Connections -> "Route all traffic through the internal network" to "Enabled: Enabled State".