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Methods for Deploying Updates
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If complete automation is not acceptable, you can also give users control over when updates are downloaded and installed . The Windows Update client can be configured by using Group Policy to only notify the user that updates are available . The updates are not downloaded or applied until the user clicks the notification balloon and selects the desired updates . For more information, see the section titled Windows Update Group Policy Settings later in this chapter . After the Windows Update client downloads updates, the client checks the digital signature and the Secure Hash Algorithm (SHA1) hash on the updates to verify that they have not been modified . If Windows Update is configured to download or check for updates automatically and if WSUS or Configuration Manager 2007 R2 is not being used to manage updates, the Windows Update client will always update itself automatically . This ensures that the Windows Update client will continue to function correctly .
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Windows Server Update Services (WSUS) is a version of the Microsoft Update service that you can host on your private network . WSUS connects to the Windows Update site, downloads information about available updates, and adds them to a list of updates that require administrative approval . To deploy updates to Windows 7 clients, you must use WSUS 3 .0 with SP2 or later versions . After an administrator approves and prioritizes these updates, WSUS automatically makes them available to any computer running Windows Update (or the Automatic Updates client on earlier versions of Windows) . Windows Update (when properly configured) then checks the WSUS server and automatically downloads and installs updates as configured by the administrators . As shown in Figure 23-1, WSUS can be distributed across multiple servers and locations to scale to enterprise needs . WSUS meets the needs of medium-sized organizations and many enterprises . WSUS requires at least one infrastructure server: a computer running Windows Server 2003 SP2 or later server operating systems with the Microsoft .NET Framework 2 .0 SP1 or later versions . Additionally, the server must have Microsoft Internet Information Services (IIS) 6 .0 or later versions installed . As shown in Figure 23-2, WSUS is managed using a Microsoft Management Console (MMC) console .
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CHapTER 23 Managing Software Updates
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Primary WSUS server Secondary WSUS server
Updates delivered to secondary WSUS servers
Secondary WSUS server
Secondary WSUS server
FIgURE 23-1 WSUS can scale for enterprises .
FIgURE 23-2 WSUS is managed using an MMC console .
Methods for Deploying Updates
CHapTER 23
iMpoRtAnt
To deploy updates to Windows 7 computers, you must have WSUS 3.0 with
Sp2 or later versions.
The WSUS interface enables administrators to perform the following administrative tasks:
n n n
Synchronize the WSUS server by downloading a list of updates from Microsoft . Approve updates for distribution to client computers . View a list of computers that successfully installed updates or experienced problems installing updates and determine exactly which updates have been installed .
For more information about update management with WSUS and to download
note
WSUS, visit http://www.microsoft.com/wsus.
System Center Configuration Manager 2007 R2
Microsoft System Center Configuration Manager 2007 R2 (Configuration Manager 2007 R2) is software for enterprises to more efficiently manage their network infrastructure, including distributing software updates . The software update distribution mechanism of Configuration Manager 2007 R2 is based on WSUS . However, Configuration Manager 2007 R2 also supports:
Custom software update catalogs that you can use to distribute updates for third-party and custom applications . Wake-on-LAN capability to start and update computers outside of normal business hours . Internet-based update distribution for clients that are disconnected from the internal network . Integration with Network Access Protection (NAP) to require client computers to apply updates before connecting to the internal network . Flexible reporting to simplify analyzing update distribution in your organization .
For more information about Configuration Manager 2007 R2, visit the Configura-
note
tion Manager 2007 R2 Web site at http://www.microsoft.com/sccm. For information about using Configuration Manager 2007 R2 for update management, refer to Software Updates in Configuration Manager at http://technet.microsoft.com/en-us/library/bb680701.aspx.
CHapTER 23 Managing Software Updates
Manually Installing, Scripting, and Removing Updates
Most updates in your organization should be installed using WSUS 3 .0 SP2 or Configuration Manager 2007 R2 . However, at times you might need to install, script, or remove updates manually . This section provides an overview of Windows Update files and describes how to work with updates .
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