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Generation QR Code in C#.NET Windows Server 2003 Forest

Windows Server 2003 Forest
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8 Shortcut trust
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Figure 6-2
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External trust A trust is created between a domain in a forest and either a Win dows NT 4.0 domain or a domain in another forest. Figure 6-3 shows several external trusts. Characteristics of external trusts include:
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The trust is a one-way, nontransitive Windows NT 4.0 style trust. If you want trust to extend in both directions, you must create two one-way external trusts. The trust is nontransitive that is, the trust does not extend to other domains. If you want trusts between multiple domains, you must establish a trust between each domain. Figure 6-4 shows how a complete trust between all domains in two different forests would be created. It shows two one-way trusts extended between each domain. NTLM will be used to authenticate the trust.
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Designing Forest and Domain Trust Models
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Windows NT 4.0 Domain
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Windows NT 4.0 Domain External trusts
Windows Server 2003 Forest
Windows Server 2003 Forest
Figure 6-3
External trusts
Windows 2003 Server Forest
Figure 6-4
Establishing complete trust
External trust with a non-Windows Kerberos realm A realm is similar to a Win dows domain. It is a logical collection of computers. If a realm trust is required, it can be created. A realm trust can be one-way or two-way, transitive or nontransi tive, depending on the realm and the needs of the trust users.
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Designing a Logical Authentication Strategy
See Also
Instructions for creating a realm trust are at http://www.microsoft.com/technet /prodtechnol/windowsserver2003/proddocs/entserver/domadmin_createrealmtrust.asp.
Forest trust A forest trust can be created between two Windows Server 2003 for ests. These trusts can be one-way or two-way trusts and are transitive. In a forest trust, every domain trusts every other domain in the other forests. Figure 6-5 shows an example of a forest trust. A forest trust can be created only between two Windows Server 2003 forests. Both forests must be at the Windows Server 2003 forest functional level.
Forest trust 1 A
F Windows Server 2003 Forest
Windows Server 2003 Forest
Figure 6-5
The forest trust
Walking the Trust Path
Within a Windows Server 2003 or Windows 2000 forest, every domain trusts every other domain. If Sally, a user from the west.mo.tailspintoys.com domain, wants to access a file in the newyork.west.worldwideimporters.com domain (assuming the worldwideimporters.com tree is part of the tailspintoys.com forest) and has been authorized to do so, she can access a file without the need to do anything special. However, for Sally to obtain access, her computer system must request a session ticket for the server in the east.newyork.worldwideimporters.com domain by mak ing multiple requests. Although all domains trust each other, each domain has only cross-domain credentials to access its child domains or its parent domain. Session ticket requests are said to walk a trust path until they can make the request of a domain controller in the same domain as the resource computer. In Sally s case, the trust path included the following computers, as shown in Figure 6-6.
Lesson 1
Designing Forest and Domain Trust Models
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west.mo.tailspintoys.com mo.tailspintoys.com tailspintoys.com worldwideimporters.com west.worldwideimporters.com newyork.west.worldwideimporters.com
tailspintoys.com worldwideimporters.com mo.tailspintoys.com west.worldwideimporters.com west.mo.tailspintoys.com newyork.west.worldwideimporters.com
Windows Server 2003 Forest
Figure 6-6
Walking the trust path
What Are Functional Levels
Before a forest trust can be created between two Windows Server 2003 forests, they both must have a Windows Server 2003 forest functional level. Functional levels are formal designations that cannot be set if their restrictions on domain controller operat ing systems are not met. Both domain and forest functional levels are available. In each case, a functional level can be configured when domains controller requirements are met. Forest trust creation is not the only benefit. Table 6-1 lists the domain, and Table 6-2 lists the forest functional levels and the type of operating system domain controllers required for each.
Important On the domain controller, the operating system level is important in setting the functional level. Windows NT 4.0 and Windows 2000 servers and Windows NT 4.0 Worksta tion, Windows XP Professional, and Windows 2000 Professional computers can be joined in the domains and not affect the ability to raise functional level.
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Designing a Logical Authentication Strategy
Table 6-1
Domain Functional Levels and Required Domain Controllers
Windows NT 4.0 domain controllers required Yes No Yes No Windows 2000 domain controllers required Yes Yes No No Windows Server 2003 domain controllers required Yes Yes Yes Yes
Domain Functional Level Windows 2000 Mixed Windows 2000 Native Windows Server 2003 Interim Windows Server 2003
Table 6-2
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