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Managed Gigabit Switch

48 T1000-TM-EN-2

NAS Configuration

This page allows you to configure the IEEE 802.1X and MAC-based authentication system and port

settings.

The IEEE 802.1X standard defines a port-based access control procedure that prevents unauthorized

access to a network by requiring users to first submit credentials for authentication. One or more

central servers, the backend servers, determine whether the user is allowed access to the network.

These backend (RADIUS) servers are configured on the "Configuration→Security→AAA" page. The

IEEE802.1X standard defines port-based operation, but non-standard variants overcome security

limitations as shall be explored below.

MAC-based authentication allows for authentication of more than one user on the same port, and

doesn't require the user to have special 802.1X supplicant software installed on his system. The switch

uses the user's MAC address to authenticate against the backend server. Intruders can create

counterfeit MAC addresses, which makes MAC-based authentication less secure than 802.1X

authentication.

The NAS configuration consists of two sections, a system- and a port-wide.

System Configuration

Mode

Indicates if NAS is globally enabled or disabled on theswitch. If globally disabled, all ports are allowed

forwarding of frames.

Reauthentication Enabled

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Prime T1000 Technical Information Page 48