August 2003
Intermediate to advanced
270 pages
10h 9m
English
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Heimdal
In Heimdal Kerberos, Kerberos database tasks are performed by the kadmind daemon. Normally this daemon is run on KDC startup when the main Kerberos daemon, kdc, is started. The kadmind daemon listens for client requests on TCP port 749. The client, kadmin, can be run on any machine that is able to communicate with the KDC. It is recommended that a firewall be used to limit network access to port 749 to restrict unauthorized users from connecting to the administrative daemon.
Heimdal uses the /etc/krb5.conf
configuration file to locate the master KDC running the kadmind
server. The value of the admin_server parameter listed in the realm
that the client is a member of is used as the server to connect to. If
this parameter does not exist, or the administration server is not
running on that server, then kadmin will exit with an error message.
You can manually specify a realm and kadmind server by using the
-r and -a command-line options,
respectively.
After a connection has been established between the kadmin client and the kadmind server, the client performs mutual authentication with the administration server, using a temporary credential cache to acquire tickets to authenticate with the server for security reasons.
Note that a Heimdal kadmin client is required to communicate with a Heimdal kadmind server. You cannot use MIT kadmin to administer a Heimdal KDC.
Heimdal also contains a fail-safe method for editing the Kerberos database. By logging into the master KDC directly as ...
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