This document provides instructions for configuring the Windows Firewall to allow access to SQL Server. It begins with basic firewall information and default firewall settings. It then discusses the programs that can be used to configure the Windows Firewall, including the Windows Firewall item in Control Panel and the Windows Firewall with Advanced Security snap-in. The document lists the ports used by different SQL Server services, like the Database Engine, Analysis Services, and Reporting Services, and provides guidance on configuring firewall rules to allow traffic on those ports.