ZyXEL Prestige 202H Plus ISDN Router 91-003-154001B 用户手册

P-202H Plus v2 User’s Guide

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Chapter 27 System Security

RADIUS authentication is a popular 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

Figure 155   RADIUS Server

In order to ensure network security, the ZyXEL Device and the RADIUS server use a shared 
secret key, which is a password, they both know. The key is not sent over the network. In 
addition to the shared key, password information exchanged is also encrypted to protect the 
network from unauthorized access.

Enter 23 in the main menu to display Menu 23 - System Security.

From Menu 23- System Security, enter 2 to display Menu 23.2 - System Security-External 
Server as shown next. 

Figure 156   Menu 23.2 System Security : External Server

The following table describes the fields in this screen.

 Menu 23.2 - System Security - External Server

  Authentication Server:
    Active= No
    Type: RADIUS
    Server Address= ?
    Port #= 1645
    Key= ?

       Press ENTER to Confirm or ESC to Cancel:

Table 85   Menu 23.2 System Security : External Server

Authentication Server

Active

Press [SPACE BAR] to select Yes and press [ENTER] to enable user 

authentication through an external authentication server. 

Type

This field displays the external server type.