Administrator Guide

Idle Time
Every session line has its own idle-time. If the idle-time value is not changed, the default value of 30 minutes is used.
RADIUS species idle-time allow for a user during a session before timeout. When a user logs in, the lower of the two idle-time
values (congured or default) is used. The idle-time value is updated if both of the following happens:
• The administrator changes the idle-time of the line on which the user has logged in.
• The idle-time is lower than the RADIUS-returned idle-time.
Conguration Task List for RADIUS
To authenticate users using RADIUS, you must specify at least one RADIUS server so that the system can communicate with and
congure RADIUS as one of your authentication methods.
The following list includes the conguration tasks for RADIUS.
• Dening a AAA Method List to be Used for RADIUS (mandatory)
• Applying the Method List to Terminal Lines (mandatory except when using default lists)
• Specifying a RADIUS Server Host (mandatory)
• Setting Global Communication Parameters for all RADIUS Server Hosts (optional)
• Monitoring RADIUS (optional)
For a complete listing of all Dell Networking OS commands related to RADIUS, refer to the Security chapter in the Dell Networking
OS Command Reference Guide.
NOTE: RADIUS authentication and authorization are done in a single step. Hence, authorization cannot be used
independent of authentication. However, if you have congured RADIUS authorization and have not congured
authentication, a message is logged stating this. During authorization, the next method in the list (if present) is used, or
if another method is not present, an error is reported.
To view the conguration, use the show config in LINE mode or the show running-config command in EXEC Privilege
mode.
Dening a AAA Method List to be Used for RADIUS
To congure RADIUS to authenticate or authorize users on the system, create a AAA method list.
Default method lists do not need to be explicitly applied to the line, so they are not mandatory.
To create a method list, use the following commands.
• Enter a text string (up to 16 characters long) as the name of the method list you wish to use with the RADIUS authentication
method.
CONFIGURATION mode
aaa authentication login method-list-name radius
• Create a method list with RADIUS and TACACS+ as authorization methods.
CONFIGURATION mode
aaa authorization exec {method-list-name | default} radius tacacs+
Typical order of methods: RADIUS, TACACS+, Local, None.
If RADIUS denies authorization, the session ends (RADIUS must not be the last method specied).
Applying the Method List to Terminal Lines
To enable RADIUS AAA login authentication for a method list, apply it to a terminal line.
To congure a terminal line for RADIUS authentication and authorization, use the following commands.
Security
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