The Windows Firewall must block unicast response to multicast or broadcast messages for the Domain Profile.

Overview

Finding ID	Version	Rule ID	IA Controls	Severity
V-17421	5.456	SV-25223r2_rule	ECSC-1	Medium

Description
A firewall provides a line of defense against attack. To be effective, it must be enabled and properly configured. Unicast responses to multicast or broadcast messages in the domain will be blocked. This helps minimize the risk of an attacker using broadcast or multicast traffic to deliver malicious payloads.

STIG	Date
Win7 Audit	2013-06-10

Details

Check Text ( None )
None

Fix Text (F-41927r2_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) -> Domain Profile Tab -> Settings (select Customize) -> Unicast response, "Allow unicast response" to "No". Configure a comparable setting if a third-party firewall is used.

Fix Text (F-41927r2_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) -> Domain Profile Tab -> Settings (select Customize) -> Unicast response, "Allow unicast response" to "No".

Configure a comparable setting if a third-party firewall is used.