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Local firewall rules for the Windows Firewall must not be merged with group policy rules for the Public Profile.
Overview
| Finding ID | Version | Rule ID | IA Controls | Severity |
|---|---|---|---|---|
| V-17442 | 5.477 | SV-25244r2_rule | ECSC-1 | Medium |
| Description |
|---|
| A firewall provides a line of defense against attack. To be effective, it must be enabled and properly configured. Merging local firewall rules with group policy firewall rules may weaken intended group policy firewall configurations. |
| STIG | Date |
|---|---|
| Windows 7 Security Technical Implementation Guide | 2013-07-03 |
Details
| Check Text ( C-45404r1_chk ) |
|---|
| If the following registry value does not exist or is not configured as specified, this is a finding: Registry Hive: HKEY_LOCAL_MACHINE Subkey: \Software\Policies\Microsoft\WindowsFirewall\PublicProfile\ Value Name: AllowLocalPolicyMerge Type: REG_DWORD Value: 0 If a third-party firewall is used, verify a comparable setting has been implemented. The Remote Endpoint STIG contains additional firewall requirements for systems used remotely. |
| Fix Text (F-41969r2_fix) |
|---|
| 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". Configure a comparable setting if a third-party firewall is used. |