Reference Guide

CONFIGURATION mode or EXEC Privilege mode
show accounting
Dell#show accounting
Active accounted actions on tty2, User admin Priv 1
Task ID 1, EXEC Accounting record, 00:00:39 Elapsed, service=shell
Active accounted actions on tty3, User admin Priv 1
Task ID 2, EXEC Accounting record, 00:00:26 Elapsed, service=shell
Dell#
AAA Authentication
The system 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 switch 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 the Dell Networking
OS, 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 Dell Networking OS
Command Reference Guide.
Configure Login Authentication for Terminal Lines
You can assign up to five authentication methods to a method list. The system 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, the system applies the next method list until the user either passes
or fails the authentication. If the user fails a method list, the system does not apply the next method list.
Configuring AAA Authentication Login Methods
To configure an authentication method and method list, use the following commands.
Dell Networking OS 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, the system allows access even though the username and password
credentials cannot be verified. Only the console port behaves this way, and does so to ensure that users are not locked out of
the system if network-wide issue prevents access to these servers.
1. Define an authentication method-list (method-list-name) or specify the default.
CONFIGURATION mode
aaa authentication login {method-list-name | default} method1 [... method4]
Security
663