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

From Windows 10 Security Technical Implementation Guide

Associated with: CCI-000366

SV-78075r1_rule Connections to non-domain networks when connected to a domain authenticated network must be blocked.

Vulnerability 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".

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