Radius; Radius Authentication - Dell Z9000 Configuration Manual

RADIUS

Remote authentication dial-in user service (RADIUS) is a distributed client/server protocol.
This protocol transmits authentication, authorization, and configuration information between a central
RADIUS server and a RADIUS client (the Dell Networking system). The system sends user information to
the RADIUS server and requests authentication of the user and password. The RADIUS server returns one
of the following responses:
• Access-Accept — the RADIUS server authenticates the user.
• Access-Reject — the RADIUS server does not authenticate the user.
If an error occurs in the transmission or reception of RADIUS packets, you can view the error by enabling
the debug radius command.
Transactions between the RADIUS server and the client are encrypted (the users' passwords are not sent
in plain text). RADIUS uses UDP as the transport protocol between the RADIUS server host and the client.
For more information about RADIUS, refer to RFC 2865, Remote Authentication Dial-in User Service.

RADIUS Authentication

Dell Networking OS supports RADIUS for user authentication (text password) at login and can be
specified as one of the login authentication methods in the aaa authentication login command.
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 specifies idle-time allow for a user during a session before timeout. When a user logs in, the
lower of the two idle-time values (configured 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.
ACL Configuration Information
The RADIUS server can specify an ACL. If an ACL is configured on the RADIUS server, and if that ACL is
present, the user may be allowed access based on that ACL.
If the ACL is absent, authorization fails, and a message is logged indicating this.
RADIUS can specify an ACL for the user if both of the following are true:
• If an ACL is absent.
• If there is a very long delay for an entry, or a denied entry because of an ACL, and a message is
logged.
NOTE: The ACL name must be a string. Only standard ACLs in authorization (both RADIUS and
TACACS) are supported. Authorization is denied in cases using Extended ACLs.
Security
725