HP UX Red Hat Direry Server Software manual Realms, Configuring the KDC Server

Models: UX Red Hat Direry Server Software

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5.1. Realms

A realm is a set of users and the authentication methods for those users to access the realm. A realm resembles a fully-qualified domain name and can be distributed across either a single server or a single domain across multiple machines. A single server instance can also support multiple realms.

Realms are used by the server to associate the DN of the client in the following form, which looks like an LDAP DN:

uid=user_name/[server_instance],cn=realm,cn=mechanism,cn=auth

NOTE

Kerberos systems treat the Kerberos realm as the default realm; other systems default to the server.

Mike Connors in the engineering realm of the European division of example.com would have the following association if he tried to access a different server, such as cyclops:

uid=mconnors/cn=Europe.example.com,

cn=engineering,cn=gssapi,cn=auth

Babara Jensen in the accounting realm of US.example.com would not have to specify a realm:

uid=bjensen,cn=accounting,cn=gssapi,cn=auth

If realms are supported by the mechanism and the default realm was not used, realm must be specified; otherwise, it is omitted. Currently, only GSS-APIsupports the concept of realms.

5.2. Configuring the KDC Server

To use GSS-API, the user first obtains a ticket granting ticket (TGT). In many systems, this TGT is issued when the user first logs into the operating system. There are usually command-line utilities provided with the operating system — kinit, klist, and kdestroy — that can be used to acquire, list, and destroy the TGT. The ticket and the ticket's lifetime are parameters in the Kerberos client and server configuration.

Refer to the operating system documentation for information on installing and configuring a Kerberos server (also called a key distribution center or KDC). Configuring a KDC for Directory Server is described in Section 5.3, “Example: Configuring an Example KDC Server”.

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Page 447
Image 447
HP UX Red Hat Direry Server Software manual Realms, Configuring the KDC Server