The Windows Firewall must block unsolicited inbound connections for the Private Profile.

Overview

Finding ID	Version	Rule ID	IA Controls	Severity
WN12-FW-000011	WN12-FW-000011	WN12-FW-000011_rule		High

Description
A firewall provides a line of defense against attack. To be effective, it must be enabled and properly configured. Unsolicited inbound connections may be malicious attempts to gain access to a system. Unsolicited inbound connections for which there is no rule allowing the connection will be blocked on a private network.

STIG	Date
Microsoft Windows Server 2012 Member Server Security Technical Implementation Guide	2013-07-25

Details

Check Text ( C-WN12-FW-000011_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\WindowsFirewall\PrivateProfile\ Value Name: DefaultInboundAction Type: REG_DWORD Value: 1 If a third-party firewall is used, verify a comparable setting has been implemented.

Fix Text (F-WN12-FW-000011_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) -> Private Profile Tab -> State, "Inbound connections" to "Block (default)". Configure a comparable setting if a third-party firewall is used.