User's Manual

3-48
Cisco 3200 Series Wireless MIC Software Configuration Guide
OL-7734-02
Chapter 3 Administering the WMIC
Controlling WMIC Access with TACACS+
Configuring TACACS+ Login Authentication
To configure AAA authentication, you define a named list of authentication methods and then apply that
list to various interfaces. The method list defines the types of authentication to be performed and the
sequence in which they are performed; it must be applied to a specific interface before any of the defined
authentication methods are performed. The only exception is the default method list (which, by
coincidence, is named default). The default method list is automatically applied to all interfaces except
those that have a named method list explicitly defined. A defined method list overrides the default
method list.
A method list describes the sequence and authentication methods to be queried to authenticate an
administrator. You can designate one or more security protocols to be used for authentication, thus
ensuring a backup system for authentication in case the initial method fails. The software uses the first
method listed to authenticate users; if that method fails to respond, the software selects the next
authentication method in the method list. This process continues until there is successful communication
with a listed authentication method or until all defined methods are exhausted. If authentication fails at
any point in this cycle—meaning that the security server or local username database responds by denying
the administrator access—the authentication process stops, and no other authentication methods are
attempted.
Beginning in privileged EXEC mode, follow these steps to configure login authentication. This
procedure is required.
Command Purpose
Step 1
configure terminal Enter global configuration mode.
Step 2
aaa new-model Enable AAA.
Step 3
aaa authentication login {default |
list-name} method1 [method2...]
Create a login authentication method list.
• To create a default list that is used when a named list is not specified
in the login authentication command, use the default keyword
followed by the methods that are to be used in default situations. The
default method list is automatically applied to all interfaces.
• For list-name, specify a character string to name the list you are
creating.
• For method1..., specify the actual method the authentication
algorithm tries. The additional methods of authentication are used
only if the previous method returns an error, not if it fails.
Select one of these methods:
• local—Use the local username database for authentication. You must
enter username information into the database. Use the username
password global configuration command.
• tacacs+—Use TACACS+ authentication. You must configure the
TACACS+ server before you can use this authentication method.
Step 4
line [console | tty | vty] line-number
[ending-line-number]
Enter line configuration mode, and configure the lines to which you want
to apply the authentication list.