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

From Windows 7 Security Technical Implementation Guide

Part of Windows Firewall Domain - Unicast Response

Associated with IA controls: ECSC-1

SV-25223r2_rule The Windows Firewall must block unicast response to multicast or broadcast messages for the Domain Profile.

Vulnerability discussion

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.

Check content

Fix text

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.

Pro Tips

Lavender hyperlinks in small type off to the right (of CSS class id, if you view the page source) point to globally unique URIs for each document and item. Copy the link location and paste anywhere you need to talk unambiguously about these things.

You can obtain data about documents and items in other formats. Simply provide an HTTP header Accept: text/turtle or Accept: application/rdf+xml.