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Lesson 3
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Troubleshooting Server Services 12-33
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Figure 12-25
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The implications of this one service are quite complex. In this case, you can see that this service relies on the Telephony service, which in turn relies on both the Plug And Play service and the Remote Procedure Call (RPC) service running. Conversely, if the Remote Access Connection Manager service is not running, neither the Internet Con nection Firewall (ICF)/Internet Connection Sharing (ICS) service nor the Remote Access Auto Connection Manager service will start.
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Most of the services that are installed by Windows Server 2003 run under the Local Sys tem context; that is, the special Local System account controls when the service should be started and stopped. However, additionally loaded services (usually by Microsoft or third-party applications) run under potentially different contexts. Often, when the ser vice is being loaded, the administrator is asked for specific credentials under which the service is run. This way, instead of providing the service unobstructed access to the system by means of the special System account, the service is restricted to the context of the user the administrator provides. Sometimes this account is a local user to the computer (say, a local administrator account); other times, the account has even fewer privileges. The level of access required depends on the requirements of the application and the services it installs. The best approach, however, is to provide to the account only the least amount of access that is required. For instance, if the service account could start with a local user account, you should not necessarily make the account a local administrator account simply because it is going to be used to control a service. Consult your installation doc umentation for specific rights required for each application you are planning to load.
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12-34
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12
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Maintaining a Network Infrastructure
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Occasionally, after installing a new application that installs new services, the new application s services might not start. You can see whether the service is started by inspecting Computer Manager; however, diving into the System event log yields much more productive information, as shown in Figure 12-26 and Figure 12-27.
Figure 12-26
One possible error when account data is not valid
Figure 12-27
Another possible error when account data is not valid
Lesson 3
Troubleshooting Server Services 12-35
Warning
In real life, you would not actually change the logon account properties of the Telnet service. This figure showing the Telnet service is provided only as an example of what it looks like to change the account properties as if the service were a third-party installed service.
However, even the information in the event log needs to be reconciled. Just knowing that you have a logon failure is not enough. Indeed, there can be many possible rea sons why the failure has occurred:
The user name for the account has been renamed, deleted, disabled, or is otherwise invalid. The password for the account has expired and needs to be reset. The account specified to run the service has not been granted the Log On As A Service right.
To address any of these problems, first, in the service itself, inspect the Log On tab, as shown in Figure 12-28, to ensure that the account information provided is correct based on the application s specifications.
Figure 12-28
Using the Log On tab to ensure that the account information for the service is correct
After verifying the name of the account and the password, you should additionally ensure that the account has been granted the Log On As A Service right. If you are using a domain account to run the service, you should inspect the Default Domain Controller policy. To perform this task, from the Start menu, point to Administrative Tools, and then click Domain Controller Security Policy. In the left pane under the Local Policies node, double-click User Rights Assignment, and in the right pane, select Log On As A Service, as shown in Figure 12-29.
12-36
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