vb.net generator ean 13 barcode Lesson 1: Creating Computers and Joining the Domain in Visual Studio .NET

Making ANSI/AIM Code 128 in Visual Studio .NET Lesson 1: Creating Computers and Joining the Domain

Lesson 1: Creating Computers and Joining the Domain
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netdom join MachineName /Domain:DomainName [/OU:"DN of OU"] [/UserO:LocalUsername] [/PasswordO:{LocalPassword|*} ] [/UserD:DomainUsername] [/PasswordD:{DomainPassword|*} ] [/SecurePasswordPrompt] [/REBoot[:TimeInSeconds]]
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It can be useful to join a computer to a domain from the command line, first, because it can be included in a script that performs other actions. Second, Netdom.exe can be used to join a computer remotely to the domain. Third, Netdom.exe enables you to specify the OU for the computer object. The command s parameters are, for the most part, self-explanatory. UserO and PasswordO are credentials that are members of the workgroup computer s local Administrators group. Specifying * for the password causes Netdom.exe to prompt for the password on the command line. UserD and PasswordD are domain credentials with permission to create a computer object, if the account is not prestaged, or to join a computer to a prestaged account. The REBoot parameter causes the system to reboot after joining the domain. The default timeout is 30 seconds. The SecurePasswordPrompt parameter displays a pop-up for credentials when * is specified for either PasswordO or PasswordD.
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Importance of Prestaging Computer Objects
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The best practice is to prestage a computer account prior to joining the computer to the domain. Unfortunately, Windows enables you to join a computer to a domain without following best practices. You can log on to a workgroup computer as a local administrator and change the computer s membership to the domain. Then, on demand, Windows creates a computer object in the default computer container, gives you permission to join a computer to that object, and joins the system to the domain. There are three problems with this behavior of Windows. First, the computer account created automatically by Windows is placed in the default computer container, which is not where the computer object belongs in most enterprises. Second, you must move the computer from the default computer container into the correct OU, which is an extra step that is often forgotten. Third, any user can join a computer to the domain no domain-level administrative permissions are required. Because a computer object is a security principal, and because the creator of a computer object owns the object and can change its attributes, this exposes a potential security vulnerability. The next sections detail these disadvantages.
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Configuring the Default Computer Container
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When you join a computer to the domain and the computer object does not already exist in Active Directory, Windows automatically creates a computer account in the default computer container, which is called Computers (CN=Computers,DC=domain, by default). The problem with this relates to the discussion of OU design earlier in the lesson. If you have implemented the best practices described there, you have delegated permissions to administer computer objects in specific OUs for clients and servers. Additionally, you might have linked GPOs to
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Computers
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those OUs to manage the configuration of these computer objects. If a new computer object is created outside of those OUs, in the default computer container, the permissions and configuration it inherits from its parent container will be different than what it should have received. You will then need to remember to move the computer from the default container to the correct OU after joining the domain. Two steps are recommended to reduce the likelihood of this problem. First, always try to prestage computer accounts. If an account is prestaged for a computer in the correct OU, then when the computer joins the domain, it will use the existing account and will be subject to the correct delegation and configuration. Second, to reduce the impact of systems being joined to the domain without a prestaged account, change the default computer container so that it is not the Computers container itself but, instead, is an OU that is subject to appropriate delegation and configuration. For example, if you have an OU called Clients, you can instruct Windows to use that OU as the default computer container, so that if computers are joined to the domain without prestaged accounts, the objects are created in the Clients OU. The Redircmp.exe command, available on domain controllers, redirects the default computer container with the following syntax:
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redircmp "DN of OU for new computer objects"
Now, if a computer joins the domain without a prestaged computer account, Windows creates the computer object in the specified organizational unit.
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