Radius Server Setup - ZyXEL Communications XGS2220 Series User Manual

track when users log in, log out, execute commands and so on. Accounting can also record system
related actions such as boot up and shut down times of the Switch.
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.
RADIUS
RADIUS is a security protocol 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 authentication allows you to validate an unlimited number of users from a central
location.
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+.
Table 244 RADIUS vs. TACACS+
Transport
Protocol
Encryption

65.2 RADIUS Server Setup

Use this screen to configure your RADIUS server settings. Click SECURITY > AAA > RADIUS Server Setup to
view the screen as shown.
Chapter 65 AAA
RADIUS
UDP (User Datagram Protocol)
Encrypts the password sent for
authentication.
XGS2220 Series User's Guide
TACACS+
TCP (Transmission Control Protocol)
All communication between the client (the Switch)
and the TACACS server is encrypted.
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