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Normally only members of the Enterprise Admins group can create an application directory partition. However, it is possible for a member of the Enterprise Admins group to prepare a cross-reference object for the application directory partition and to delegate the rest of the process to someone with more limited permissions. The cross-reference object for an application directory partition holds several valuable pieces of information, including the domain controllers that are to have a replica of this partition and the security descriptor reference domain. The partition root node is the Active Directory object at the root of the partition. The Enterprise Admin can create the cross-reference object then delegate to a person or group with less permissions the right to create the application directory partition root node. Both creation of the cross-reference object and the application directory partition root node can be accomplished using Ntdsutil. After using Ntdsutil to create the cross-reference object, the enterprise administrator must modify the cross-reference object s access control list to allow the delegated administrator to modify this cross-reference. This will allow the delegated administrator to create the application directory partition and modify the list of domain controllers that holds replicas of this application directory partition. The delegated administrator must use the names of the application directory partition and the domain controller name that were specified during the precreation process.

Design SUS server log review:

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Any business interface can throw application exceptions. These should describe a business logic problem in this case, a problem in encryption/decryption. Application exceptions should be meaningful to the client, providing a brief and relevant identification of the error. Our new EncryptionException will describe a specific business problem that is possibly recoverable; this makes it an application exception. The EJB container treats any

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The SUS server checks all the patches it downloads for a digital signature. If a signature cannot be validated, an error message The subject is not trusted for the specified action is written to the synchronization log. These errors might mean there is a problem with the official patch or an attempt to subvert the patching process.

To prepare a cross-reference object: 1. Type the appropriate commands to invoke the Ntdsutil domain management command. 2. At the domain management command prompt, type: precreate ObjectName DomainController, where ObjectName is the distin guished name of the object you want to create, and DomainController is the DNS name of the domain controller on which the object will reside.

exception that does not extend RuntimeException as an application exception. Here is the definition of EncryptionException:

Note All downloaded patches are saved with a .tmp file extension until their digital signa ture is checked. If they pass the check, they are then stored with their original extension. This prevents an unsafe patch from accidentally being applied.

The security descriptor reference domain defines a domain name for the default secu rity descriptor for objects in the application directory partition. By default, the security descriptor reference domain is the parent domain of the application directory partition. If the application directory partition is a child of another application directory partition, the default security descriptor reference domain is the security descriptor reference domain of the parent application directory partition. If the application directory parti tion has no parent, the forest root domain becomes the default security descriptor ref erence domain. You can use Ntdsutil to change the default security descriptor reference domain. To set an application directory partition reference domain: 1. Type the appropriate commands to invoke the Ntdsutil domain management command. 2. At the domain management command prompt, type: set nc reference domain ApplicationDirectoryPartition ReferenceDomain, where ApplicationDirectoryPartition is the distinguished name of the application directory partition for which you want to set the reference domain, and ReferenceDomain is the distinguished name of the domain that you want to be the refer ence domain for the application directory partition.

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A properly configured virus-scanning product will delete any patch that is infected with a virus. Use a product that logs these actions, and review logs on a daily basis. Establish event log reviews that look for failures in downloading on SUS clients. Error messages are documented in the SUS deployment white paper, which can be downloaded from www.microsoft.com/windows2000 /windowsupdate/sus/susdeployment.asp. Review the update.log file in the root of the system folder of the AU client. This file records the activities of the AU client. Examine the SUS server IIS logs to find failed AU clients. Examine the AU client status in the registry. The AUState value of 2 means the client will look for newly approved updates. A value of 5 means the client is pending installation of updates and cannot run a new detection. (The cli ent resets itself after updates have been made. The AUState value is located in the registry key HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion \WindowsUpdate\Auto Update.)

The following questions are intended to reinforce key information presented in this lesson. If you are unable to answer a question, review the lesson and then try the ques tion again. Answers to the questions can be found in the Questions and Answers sec tion at the end of this chapter. 1. What is an application directory partition

@ApplicationException // Explicit annotation, though this is inferred as default because we extend Exception public class EncryptionException extends Exception{...}

Audit SUS clients: