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Cisco ME 3400 Ethernet Access Switch Software Configuration Guide
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Chapter 7 Configuring Switch-Based Authentication
Configuring the Switch for Local Authentication and Authorization
Configuring Kerberos
So that remote users can authenticate to network services, you must configure the hosts and the KDC in
the Kerberos realm to communicate and mutually authenticate users and network services. To do this,
you must identify them to each other. You add entries for the hosts to the Kerberos database on the KDC
and add KEYTAB files generated by the KDC to all hosts in the Kerberos realm. You also create entries
for the users in the KDC database.
When you add or create entries for the hosts and users, follow these guidelines:
• The Kerberos principal name must be in all lowercase characters.
• The Kerberos instance name must be in all lowercase characters.
• The Kerberos realm name must be in all uppercase characters.
Note A Kerberos server can be a Cisco ME switch that is configured as a network security server and that can
authenticate users by using the Kerberos protocol.
To set up a Kerberos-authenticated server-client system, follow these steps:
• Configure the KDC by using Kerberos commands.
• Configure the switch to use the Kerberos protocol.
For instructions, see the “Kerberos Configuration Task List” section in the “Security Server Protocols”
chapter of the Cisco IOS Security Configuration Guide, Release 12.2, at this URL:
http://www.cisco.com/univercd/cc/td/doc/product/software/ios122/122cgcr/fsecur_c/fsecsp/scfkerb.ht
m#1001027.
Configuring the Switch for Local Authentication and
Authorization
You can configure AAA to operate without a server by setting the switch to implement AAA in local
mode. The switch then handles authentication and authorization. No accounting is available in this
configuration.
Beginning in privileged EXEC mode, follow these steps to configure the switch for local AAA:
Command Purpose
Step 1
configure terminal Enter global configuration mode.
Step 2
aaa new-model Enable AAA.
Step 3
aaa authentication login default local Set the login authentication to use the local username database. The
default keyword applies the local user database authentication to all
ports.
Step 4
aaa authorization exec local Configure user AAA authorization, check the local database, and allow
the user to run an EXEC shell.
Step 5
aaa authorization network local Configure user AAA authorization for all network-related service
requests.