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V-220807

CAT II (Medium)

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

Rule ID

SV-220807r569187_rule

STIG

Microsoft Windows 10 Security Technical Implementation Guide

Version

V2R9

CCIs

CCI-000366

Discussion

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.

Check Content

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

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".