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Kudos to Microsoft for continuing to move the ball downfield with the firewall they introduced with Windows XP, formerly called Internet Connection Firewall (ICF) The new and more simply named Windows Firewall offers a better user interface (with a classic exception metaphor for permitted applications and now yer talkin ! an Advanced tab that exposes all the nasty technical details for nerdy types to twist and pull), and it is now configurable via Group Policy to enable distributed management of firewall settings across large numbers of systems Since Windows XP SP2, the Windows Firewall is enabled by default with a very restrictive policy (effectively, all inbound connections are blocked), making many of the vulnerabilities outlined in this chapter impossible to exploit out of the box
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One of the most important security countermeasures we ve reiterated time and again throughout this chapter is to keep current with Microsoft hotfixes and service packs However, manually downloading and installing the unrelenting stream of software updates flowing out of Microsoft these days is a full-time job (or several jobs, if you manage large numbers of Windows systems) Thankfully, Microsoft now includes an Automated Update feature in the OS Besides implementing a firewall, there is probably no better step you can take than to configure your system to receive automatic updates Figure 4-11 shows the Automatic Updates configuration screen
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Figure 4-11 Windows Automatic Updates con guration screen
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To understand how to configure Automatic Updates using Registry settings and/or Group Policy, see supportmicrosoftcom/kb/328010 Nonadministrative users will not see that updates are available to install (and thus may not choose to install them timely), and may also experience disruption if automatic reboot is configured If you need to manage patches across large numbers of computers, Microsoft provides the following solutions (more information on these tools is available at wwwmicrosoft com/technet/security/tools): Microsoft Update consolidates patches for Windows, Of ce, and other key products into one location and enables you to choose automatic delivery and installation of high-priority updates Windows Server Update Services (WSUS) simpli es patching of Windows systems for large organizations with simple patch deployment needs
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Systems Management Server (SMS) 2003 provides status reporting, targeting, broader package support, automated rollbacks, bandwidth management, and other more robust features for enterprises System Center Con guration Manager 2007 provides comprehensive asset management of servers, desktops, and mobile devices In the long term, System Center is the horse to bet on for large businesses, since it is designed to replace SMS And, of course, there is a vibrant market for non-Microsoft patch management solutions Simply search for windows patch management in your favorite Internet search engine to get up-to-date information on the latest tools in this space
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Security Center
The Security Center control panel is shown in Figure 4-12 Security Center is a consolidated viewing and configuration point for key system security features: Windows Firewall, Windows Update, Antivirus (if installed), and Internet Options
Figure 4-12 The Windows Security Center
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Security Center is clearly targeted at consumers and not IT pros, based on the lack of more advanced security configuration interfaces like Security Policy, Certificate Manager, and so on, but it s certainly a healthy start We remain hopeful that some day Microsoft will learn to create a user interface that pleases nontechnical users but still offers enough knobs and buttons beneath the surface to please techies
Security Policy and Group Policy
We ve discussed Security Policy a great deal in this chapter, as would be expected for a tool that consolidates nearly all of the Windows security configuration settings under one interface Obviously, Security Policy is great for configuring stand-alone computers, but what about managing security configuration across large numbers of Windows systems One of the most powerful tools available for this is Group Policy Group Policy Objects (GPOs) can be stored in the Active Directory or on a local computer to define certain configuration parameters on a domain-wide or local scale GPOs can be applied to sites, domains, or Organizational Units (OUs) and are inherited by the users or computers they contain (called members of that GPO) GPOs can be viewed and edited in any MMC console window and also managed via the Group Policy Management Console (GPMC; see http://wwwmicrosoftcom/ windowsserver2003/gpmc/defaultmspx Administrator privilege is required) The GPOs that ship with Windows 2000 and later are Local Computer, Default Domain, and Default Domain Controller Policies By simply running Start | gpeditmsc, the Local Computer GPO is called up Another way to view GPOs is to view the properties of a specific directory object (domain, OU, or site) and then select the Group Policy tab, as shown here:
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