Quick Reference Guide

Reference Guide for the Model RT338 ISDN Router
8-8 Configuring Dial-In Access
RADIUS Authentication
The Model RT338 router stores up to eight dial-in user profiles. For more than eight users, you can
use an external RADIUS (Remote Authentication Dial-In User Service) server to provide
authentication service for an unlimited number of users. The RADIUS protocol is a
software-based security authentication protocol developed by the IETF RADIUS Working Group.
The RADIUS protocol carries authentication, authorization, and configuration information
between a remote access device and a shared authentication server.
RADIUS Server Configuration
To use RADIUS authentication, you must have a UNIX or Windows NT computer on your
network as the RADIUS server, as well as the RADIUS software itself.
If you are using CLID authentication for the dial-in users, you must edit the dictionary file in the
RADIUS configuration directory (usually /etc/raddb). Using any text editor, add the following
lines to the dictionary file:
# Netgear proprietary attributes
ATTRIBUTE Netgear-Callback-Option 192 integer
VALUE Netgear-Callback-Option None 0
VALUE Netgear-Callback-Option Optional 1
VALUE Netgear-Callback-Option Mandatory 2
# Callback phone number source
ATTRIBUTE Netgear-Callback-Phone-Source 193 integer
VALUE Netgear-Callback-Phone-Source Preconfigured 0
VALUE Netgear-Callback-Phone-Source User 1
These changes add support for CLID authentication, as described in the following section.
Dialin.fm Page 8 Friday, October 6, 2000 5:27 PM