ZyXEL Communications XGS-4728F - Manual (Page 216)

Chapter 25 AAA
XGS-4728F User’s Guide
216
25.1.2 on page 216 ) as external authentication, authorization and accounting
servers.
Figure 114 AAA Server
25.1.1 Local User Accounts
By storing user profiles locally on the Switch, your Switch is able to authenticate
and authorize users without interacting with a network AAA server. However, there
is a limit on the number of users you may authenticate in this way (See
Chapter
39 on page 333 ).
25.1.2 RADIUS and TACACS+
RADIUS and TACACS+ 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
TACACS+ 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
TACACS+.
25.2 AAA Screens
The AAA screens allow you to enable authentication, authorization, accounting or
all of them on the Switch. First, configure your authentication and accounting
server settings (RADIUS, TACACS+ or both) and then set up the authentication
priority, activate authorization and configure accounting settings.
Client AAA Server
Table 67 RADIUS vs TACACS+
RADIUS TACACS+
Transport
Protocol UDP (User Datagram Protocol) TCP (Transmission Control Protocol)
Encryption Encrypts the password sent for
authentication. All communication between the client
(the Switch) and the TACACS server
is encrypted.