UCF STIG Viewer Logo

The Windows Firewall with Advanced Security local firewall rules must not be merged with Group Policy settings when connected to a public network.


Overview

Finding ID Version Rule ID IA Controls Severity
V-17442 WNFWA-000024 SV-54917r2_rule ECSC-1 Medium
Description
A firewall provides a line of defense against attack. To be effective, it must be enabled and properly configured. Local firewall rules will not be merged with Group Policy settings on a public network to prevent Group Policy settings from being changed.
STIG Date
Windows Firewall with Advanced Security Security Technical Implementation Guide 2015-02-17

Details

Check Text ( C-59033r1_chk )
If the system is not a member of a domain, this is NA.

Verify the registry value below.

If this 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\WindowsFirewall\PublicProfile\

Value Name: AllowLocalPolicyMerge

Type: REG_DWORD
Value: 0x00000000 (0)
Fix Text (F-63523r1_fix)
If the system is not a member of a domain, this is NA.

Configure the policy value for Computer Configuration -> Windows Settings -> Security Settings -> Windows Firewall with Advanced Security -> Windows Firewall with Advanced Security -> Windows Firewall Properties (this link will be in the right pane) -> Public Profile Tab -> Settings (select Customize) -> Rule merging, "Apply local firewall rules:" to "No".