ZyXEL ISG50-PSTN User Guide - Page 633
Directory Structure, Distinguished Name DN, Base DN
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Chapter 48 AAA Server • Directory Service (LDAP/AD) LDAP (Lightweight Directory Access Protocol)/AD (Active Directory) is a directory service that is both a directory and a protocol for controlling access to a network. The directory consists of a database specialized for fast information retrieval and filtering activities. You create and store user profile and login information on the external server. • RADIUS RADIUS (Remote Authentication Dial-In User Service) authentication is a popular protocol used to authenticate users by means of an external or built-in RADIUS server. RADIUS authentication allows you to validate a large number of users from a central location. Directory Structure The directory entries are arranged in a hierarchical order much like a tree structure. Normally, the directory structure reflects the geographical or organizational boundaries. The following figure shows a basic directory structure branching from countries to organizations to organizational units to individuals. Figure 422 Basic Directory Structure Root US Japan Sprint UPS NEC Sales RD3 QA CSO Sales RD Countries (c) Organizations Organization Units Unique Common Name (cn) Distinguished Name (DN) A DN uniquely identifies an entry in a directory. A DN consists of attribute-value pairs separated by commas. The leftmost attribute is the Relative Distinguished Name (RDN). This provides a unique name for entries that have the same "parent DN" ("cn=domain1.com, ou=Sales, o=MyCompany" in the following examples). cn=domain1.com, ou = Sales, o=MyCompany, c=US cn=domain1.com, ou = Sales, o=MyCompany, c=JP Base DN A base DN specifies a directory. A base DN usually contains information such as the name of an organization, a domain name and/or country. For example, o=MyCompany, c=UK where o means organization and c means country. ISG50 User's Guide 633
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