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 the IMAP4 banner seen when connecting to my Exchange server?

MS KB article 303513 has more:

When you connect to an Exchange 2000/2003 server with the Internet Message Access Protocol (IMAP) you receive a banner that is similar to the following:

Note: The IMAP4 banner has another function. Read Remote Version Checking through SMTP/POP3/IMAP4.

Note: You may also want to Change the POP3 Banner or Change the SMTP Banner.

WARNING: If you use the ADSI Edit snap-in, the LDP utility, or any other LDAP version 3 client, and you incorrectly modify the attributes of Active Directory objects, you can cause serious problems. These problems may require you to reinstall Microsoft Windows 2000/2003 Server, Microsoft Exchange 2000/2003 Server, or both. Microsoft cannot guarantee that problems that occur if you incorrectly modify Active Directory object attributes can be solved. Modify these attributes at your own risk.

This may be an issue if you do not want the version of the IMAP4 service that is running on your server to be displayed. To remove the version information from the Exchange 2000/2003 POP3 banner, follow these steps:

Note: The following screenshots were taken on a Windows Server 2003 computer running Exchange 2003. I bet you can find your way on a similar W2K + E2K computer.

  1. Using a metabase editing tool such as MetaEdit or Metabase Explorer, locate the following file:

  1. Click Edit, click New, and then click String.

  1. Verify that the entry in the ID box is Other, and then type 49884 (decimal) on the right side of the ID box.

  1. In the Data box, type the banner that you want to be displayed. Or, if you're using Windows Server 2003 and the IIS 6.0 version of Metaedit, double click the new value you've added and enter the text you want to be displayed.

  1. Stop, and then restart the IMAP4 virtual server or the IMAP4 service.

  2. To confirm that the banner has been changed, telnet to port 143 of the virtual server (the default setting). The original banner should no longer be displayed.

 


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