Connections to non-domain networks when connected to a domain authenticated network must be blocked.

Overview

Finding ID	Version	Rule ID	IA Controls	Severity
V-63585	WN10-CC-000060	SV-78075r1_rule		Medium

Description
Multiple network connections can provide additional attack vectors to a system and should be limited. When connected to a domain, communication must go through the domain connection.

STIG	Date
Windows 10 Security Technical Implementation Guide	2019-09-25

Details

Check Text ( C-64335r1_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\WcmSvc\GroupPolicy\ Value Name: fBlockNonDomain Value Type: REG_DWORD Value: 1

Fix Text (F-69515r1_fix)
Configure the policy value for Computer Configuration >> Administrative Templates >> Network >> Windows Connection Manager >> "Prohibit connection to non-domain networks when connected to domain authenticated network" to "Enabled".