ZyXEL Communications metrogigabit switch 25.2 AAA Screens

Chapter 25 AAA
MGS3700-12C User’s Guide
256
25.1.2 on page 256) as external authentication, authorization and accounting
servers.
Figure 123 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
38 on page 359).
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 72 RADIUS vs TACACS+
RADIUS TACACS+
Tran sp ort
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.