Chapter 8 Application
ENC User’s Guide
229
The device supports RADIUS (Remote Authentication Dial-In User Service, see
) and (Terminal Access Controller Access-Control System Plus, see
) as external authentication, authorization and accounting servers.
Figure 174
Authentication Server
8.11.1 Local User Accounts
By storing user profiles locally on the device, your device is able to authenticate and authorize
users without interacting with a network authentication server.
8.11.2 RADIUS and
RADIUS and are security protocols used to authenticate users by means of an external
server instead of (or in addition to) an internal device user database that is limited to the memory
capacity of the device. In essence, RADIUS and authentication both allow you to validate
an unlimited number of users from a central location.
The following table describes some key differences between RADIUS and .
8.11.3 802.1x Authentication Overview
The following figure illustrates how a client connecting to a IEEE 802.1x authentication enabled port
goes through a validation process. The device prompts the client for login information in the form of
a user name and password. When the client provides the login credentials, the device sends an
Client
Authentication
Server
Table 107
RADIUS vs
RADIUS
Transport
Protocol
UDP (User Datagram Protocol)
TCP (Transmission Control Protocol)
Encryption
Encrypts the password sent for
authentication.
All communication between the client (the
device) and the TACACS server is
encrypted.
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