General Steps

Port-based

Network Access

Control

Guidelines

AT-S79 Management Software User’s Guide

As mentioned earlier, the switch itself does not authenticate the user names and passwords from the clients. That is the responsibility of the authentication server, which contains the RADIUS server software. Instead, a switch acts as an intermediary for the authentication server by denying access to the network by the client until the client has provided a valid username and password, which the authentication server validates.

Following are the general steps to implementing 802.1x Port-based Network Access Control:

1.You must install RADIUS server software on one or more of your network servers or management stations. Authentication protocol server software is not available from Allied Telesyn. Funk Software Steel-Belted Radius and Free Radius have been verified as fully compatible with the AT-S79 management software.

2.You need to install 802.1x client software on those workstations that are to be supplicants. Microsoft WinXP client software and Meeting House Aegis client software have been verified as fully compatible with the AT-S79 management software.

3.You must configure and activate the RADIUS client software in the AT-S79 management software. The default setting for the authentication protocol is disabled. You will need to provide the following information:

ˆThe IP address of a RADIUS servers.

ˆThe encryption key used by the authentication server.

For instructions, refer to Chapter 11, “RADIUS Authentication Protocol” on page 141.

4.You must configure the authenticator port settings, as explained in “Configuring 802.1x Port-based Network Access Control” on page 136 in this chapter.

Following are the guidelines for using this feature:

ˆPorts set to Auto do not support port trunking or dynamic MAC address learning.

ˆThe appropriate setting for a port on an AT-GS950/16 or AT-GS950/24 switch connected to an authentication server is Force-authorized, the default setting. This is because an authentication server cannot authenticate itself.

ˆThe authentication server must be a member of the Default VLAN by communicating with the switch through a port that is an untagged member of the Default VLAN.

Section I: Using the Menus Interface

133

Page 133
Image 133
Allied Telesis AT-S79 manual General Steps Port-based Network Access Control Guidelines