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Updating domain GPOs from a Windows XP SP2 computer will make the GPOs unreadable from W2K/W2K3 domain controllers unless you apply the KB 824993 hotfix (available at http://support.microsoft.com/kb/842933) or your domain controller is running Windows Server 2003 SP1 or later. See also the explanation of this issue found at http:// www.microsoft.com/technet/prodtechnol/winxppro/maintain/mangxpsp2/mngdepgp.mspx.
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To update Group Policy objects in a domain, perform the following steps: 1. Install Windows XP SP2 on a computer that is a member of the domain and then restart the computer. 2. Log on to the upgraded Windows XP SP2 machine with an account that is a member of the Domain Administrators, Enterprise Administrators, or Group Policy Creator Owners security group. 3. Open the Group Policy Object Editor snap-in. a. Click Start, click Run, type mmc, and then click OK. b. Click File, Add/Remove Snap-in. c. Click Add, and select Group Policy Object Editor. d. Browse for the Group Policy object you want to update for example, the Default Domain Policy, as shown in Figure 22-9.
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Browsing for a Group Policy Object to update
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e. Click OK, and then click Finish to complete the Group Policy Wizard. f. Close the Add Standalone Snap-In dialog box. 4. Open Computer Configuration, Administrative Templates, Network, Network Connections, and then Windows Firewall, as shown in Figure 22-10.
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Selecting the Windows Firewall Group Policy template
5. Repeat these steps for any additional Group Policy objects that need to be updated.
Group Policy Settings for Windows Firewall
The Group Policy settings for Windows Firewall are divided into two separate profiles the Domain Profile, used by computers that are logged in to the domain, and the Standard Profile, used by domain member computers when they are unable to contact a domain controller for the domain. A typical example would be a mobile laptop that will use the Standard profile when on the road, but use the Domain profile when in the office. Typically the Domain profile will be less restrictive than the Standard profile. Many administrators will choose to enforce No Exceptions mode for mobile computers. At the least, File and Printer Sharing should be disabled as shown in Figure 22-11.
Figure 22-11
Disabling File and Printer Sharing with the Group Policy Standard profile
Part III:
Security
The Group Policy settings that are available for Windows Firewall are shown in Table 22-2.
Table 22-2 Setting Allow Authenticated IPSec to Pass
Group Policy Settings for Windows Firewall
Description Single setting applies to both Domain and Standard profiles. When enabled, an authenticated computer on the list of defined computers can send unsolicited messages even if they would otherwise be blocked by other policies. When this setting is not configured or disabled, no exceptions are made for IPSec traffic. When this setting is enabled, Windows Firewall can not be disabled by an administrator. If it is disabled, Windows Firewall will not run. When this setting is not configured, Windows Firewall will be on by default but can be locally configured by an administrator. When this setting is disabled, Windows Firewall is turned off and local administrators cannot turn it on. When this setting is enabled, no exceptions to Windows Firewall are allowed and local administrators cannot clear the Don t allow exceptions check box. This policy will override any other exceptions policy. When this policy is enabled, the Protect all network connections policy should also be enabled to prevent administrators from disabling Windows Firewall. When Disabled is chosen, exceptions can be configured and other policies will be in effect but an administrator cannot set the Don t allow exceptions box. When this setting is not configured, exceptions can be configured and other policies will be in effect and administrators can set or clear the Don t allow exceptions box. When this setting is enabled, a list of program exceptions can be entered in the form: <path>:<scope>:<status>:<name>, where <path> is the full path and program name; <scope> is * for all networks, localsubnet for the local subnet, or a comma-separated list of IP addresses and subnets; <status> is either enabled or disabled ; and <name> is a text string. When this setting is disabled, the list of Group Policy exceptions is deleted and local exceptions are ignored unless the Allow local program exceptions policy is enabled. When this setting is not configured, only local exceptions are used. Note: An invalid string can be entered, allowing you to preconfigure applications that haven t been installed yet.
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