Introduction to Domain and Forest Trusts

By using Windows Server 2003 domain and forest trusts, service administrators can create or extend collaborative relationships between two or more domains or forests. Windows Server 2003 domains and forests can also trust Kerberos realms and other Windows Server 2003 forests, as well as Microsoft Windows® 2000 domains and Windows NT® 4.0 domains.

When a trust exists between two domains, the authentication mechanisms for each domain trust the authentications coming from the other domain. Trusts help to provide controlled access to shared resources in a resource domain (the trusting domain) by verifying that incoming authentication requests come from a trusted authority (the trusted domain). In this way, trusts act as bridges that allow only validated authentication requests to travel between domains.

How a specific trust passes authentication requests depends on how it is configured. Trust relationships can be one-way, providing access from the trusted domain to resources in the trusting domain, or two-way, providing access from each domain to resources in the other domain. Trusts are also either nontransitive, in which case a trust exists only between the two trust partner domains, or transitive, in which case a trust automatically extends to any other domains that either of the partners trusts.

In some cases, trust relationships are established automatically when domains are created; in other cases, administrators must choose a type of trust and explicitly establish the appropriate relationships. The specific types of trusts that are used and the structure of the resulting trust relationships in a given trust implementation depend on such factors as how Active Directory is organized and whether different versions of Windows coexist on the network.

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How can I change or add OEM logo and information on my computer?

By default, the General tab (right-click My Computer, or double-click System in Control Panel, or press the   +BREAK keys on your keyboard) contains information on the Windows version, processor, memory, registered user and registration identity.

Optional items include the manufacturer and model, a small picture, and a button leading to a separate page of support information.

The information is not held in the registry, but in an old-style .INI file, which can be created in any plain-text editor including Windows Notepad.

This file can have two sections:

  1. The first section, has a section header called [General], and within that section -  two entries:

  • Manufacturer=<text>

  • Model=<text>

  1. The second section, headed [Support Information], is optional, but if present adds a button with that label to the page. The entries after that heading should be in the form:

  • Line1=<some text>

  • Line2=<more text>

  • Line3=<more text>

and so on. The limit on the number and length of lines seems limited only by the 64 KB general limit on .INI files.

The file should be saved in the %systemroot%\system folder (for Windows 98/ME computers) or in %systemroot%\system32 folder (for W2K/XP/2003 computers) as OEMINFO.INI.

The picture is a 256-colour-Windows bitmap (.BMP) file.

Microsoft states that the size should be 96 pixels square when using small fonts in Display Property settings, or 120 square with large fonts.

The file should be saved in the %systemroot%\system folder (for Windows 98/ME computers) or in %systemroot%\system32 folder (for W2K/XP/2003 computers) as OEMLOGO.BMP.

No other entry in the .INI file is required, but the latter must exist and have a populated [General] section for the bitmap to be visible in Display Properties.

No reboot is necessary in order for the hack to take place. Press the   +BREAK keys and see for yourself.

 


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