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Active Directory supports querying by attributes, so you can locate an object even if the exact DN is unknown or has changed. The relative distinguished name (RDN) of an object is the part of the name that is an attribute of the object itself. In the preceding example, the RDN of the Scott Cooper user object is Scott Cooper. The RDN of the par ent object is Promotions.

We must be very careful when determining to whom we grant access within the Secure SchoolEJB. As a first step, let s define the roles that are permitted:

Note Active Directory does not display the LDAP abbreviations for the naming attributes common name (CN), organizational unit (OU), and domain component (DC). These abbrevia tions are shown here only to illustrate how LDAP recognizes the portions of the distinguished name. Most Active Directory tools display object names in canonical form, which lists the RDNs from the root, or the DNS domain name, downwards.

Do not install the Remote Administration (HTML) tool. Use the Internet Information Services Manager for both console and remote administration. (This tool is now available for Windows XP.) Consider using terminal services. You can use the Internet Information Services Manager tool on the remote IIS server over terminal services, and you do not need to add administration tools to Windows XP. You can use terminal services from Win dows 2000 Professional and other Windows operating systems as well. Terminal ser vices sessions are encrypted, and the user using them is authenticated. In addition, unless the IIS computer has the terminal service installed and is configured to allow other users and groups, only Administrators can connect and use the service. Consider the use of IPSec to secure administrative traffic from the administrative workstation and the IIS server. Require VPN access to the network in order to administer IIS across the WAN if such administration is authorized.

A globally unique identifier (GUID) is a 128-bit hexadecimal number that is guaranteed to be unique within the enterprise. GUIDs are assigned to objects when the objects are created. The GUID never changes, even if you move or rename the object. Applica tions can store the GUID of an object and use the GUID to retrieve that object regardless of its current DN. In Windows NT, each domain resource was associated with a security identifier (SID) that was generated within the domain. This meant that the SID was guaranteed to be unique only within the domain. A GUID is unique across all domains, meaning that you can move objects from domain to domain and they will still have a unique identifier.

Designing IIS Security Baselines 13-27

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/** * Holds the list of roles with which users of the school * may be affiliated. EJB Security is role-based, so this * is how we'll determine access. * * @author <a href="mailto:andrew.rubinger@jboss.org">ALR</a> * @version $Revision: $ */ public interface Roles { /* * Roles of callers to the system */ /** * Role denoting the user is a school administrator */ String ADMIN = "Administrator"; /** * Role denoting the user is a student

Each user account has a friendly name, known as the user principal name (UPN). The UPN consists of a user account name (sometimes referred to as the user logon name) and a domain name identifying the domain in which the user account is located. For example, the user object Scott Cooper in the microsoft.com tree might have a UPN of ScottC@microsoft.com (using the full first name and the first letter of the last name).

Backend databases, databases installed on a server other than the Web server, are often a part of an IIS application. However, databases can also be installed directly on the Web server. To secure databases use the following guidelines:

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