Addendum

You can use the MOTD banner to indicate to users of critical upcoming events such as a lab shutdown of
devices or of any circuit-level maintenance or downtime that is upcoming so that they can plan and
schedule their accessibility to the device , based on the network outages and system reboots. You can
modify the banner messages depending on the requirements or conditions.
AAA Authentication
FTOS supports a distributed client/server system implemented through authentication, authorization, and
accounting (AAA) to help secure networks against unauthorized access.
In the Dell Networking implementation, the Dell Networking system acts as a RADIUS or TACACS+ client
and sends authentication requests to a central remote authentication dial-in service (RADIUS) or Terminal
access controller access control system plus (TACACS+) server that contains all user authentication and
network service access information.
Dell Networking uses local usernames/passwords (stored on the Dell Networking system) or AAA for login
authentication. With AAA, you can specify the security protocol or mechanism for different login methods
and different users. In FTOS, AAA uses a list of authentication methods, called method lists, to define the
types of authentication and the sequence in which they are applied. You can define a method list or use
the default method list. User-defined method lists take precedence over the default method list.
NOTE: If a console user logs in with RADIUS authentication, the privilege level is applied from the
RADIUS server if the privilege level is configured for that user in RADIUS, whether you configure
RADIUS authorization.
Configuration Task List for AAA Authentication
The following sections provide the configuration tasks.
• Configure Login Authentication for Terminal Lines
• Configuring AAA Authentication Login Methods
• Enabling AAA Authentication
• Enabling AAA Authentication—RADIUS
For a complete list of all commands related to login authentication, refer to the Security chapter in the
FTOS Command Reference Guide.
Configure Login Authentication for Terminal Lines
You can assign up to five authentication methods to a method list. FTOS evaluates the methods in the
order in which you enter them in each list.
If the first method list does not respond or returns an error, FTOS applies the next method list until the
user either passes or fails the authentication. If the user fails a method list, FTOS does not apply the next
method list.
Configuring AAA Authentication Login Methods
To configure an authentication method and method list, use the following commands.
FTOS Behavior: If you use a method list on the console port in which RADIUS or TACACS is the last
authentication method, and the server is not reachable, FTOS allows access even though the username
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Security for M I/O Aggregator