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


Overview

Finding ID Version Rule ID IA Controls Severity
V-17428 5.463 SV-18484r2_rule ECSC-1 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
Windows Vista Security Technical Implementation Guide 2013-03-14

Details

Check Text ( C-45377r1_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\PrivateProfile\

Value Name: DefaultInboundAction

Type: REG_DWORD
Value: 1

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-41942r2_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.