Dell PowerEdge FX2/FX2s - Manual (Page 161)

• Enabling AAA Authentication
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. Dell Networking OS 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, Dell Networking OS applies the next method
list until the user either passes or fails the authentication. If the user fails a method list, Dell Networking
OS 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, Dell Networking OS 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]
The default method-list is applied to all terminal lines.
Possible methods are:
• enable: use the password you defined using the enable secret or enable password
command in CONFIGURATION mode.
• line: use the password you defined using the password command in LINE mode.
• local: use the username/password database defined in the local configuration.
• none: no authentication.
• radius: use the RADIUS servers configured with the radius-server host command.
• tacacs+: use the TACACS+ servers configured with the tacacs-server host command.
2. Enter LINE mode.
CONFIGURATION mode
line {aux 0 | console 0 | vty number [... end-number]}
3. Assign a method-list-name or the default list to the terminal line.
LINE mode
login authentication {method-list-name | default}
To view the configuration, use the show config command in LINE mode or the show running-
config in EXEC Privilege mode.
NOTE: Dell Networking recommends using the none method only as a backup. This method does
not authenticate users. The none and enable methods do not work with secure shell (SSH).
You can create multiple method lists and assign them to different terminal lines.
Security 161