User's Guide

3e-531AP Wireless Access Point Chapter 4: Gateway Conguration
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Caution: If you have previously set up your WLAN using
the 3e-531AP devices as access points and you decide to change
the conguration to gateway mode, you will need to convert
the MAC addresses on each wireless device that has been set
up so they can be seen by the recongured system. This is ac-
complished by the following procedure, done on each device
that was congured to use the 3e-531AP when the system was
set up as an access point system. Pull up a System Prompt
(“c:\” prompt, also called an MSDos prompt) on the wireless
device’s desktop. type: arp-d and hit return. This recongures
the MAC address in the wireless device’s PC Card so that it is
now visible to the gateway.
Chapter 4: Gateway Conguration
Introduction
Chapter 3 covered the default conguration of the 3e-531AP Wireless
Access Point as an access point, for use as part of a host wired network.
This chapter covers conguration as a gateway.
If additional security for the wireless network is desired (different-
iating it from the wired network to which it is connected), set it up in
gateway mode. Gateway mode takes advantage of some built-in “router”
functions, such as the gateway’s ability to do Network Address Transla-
tion (NAT), providing private IP addresses for the wireless clients.
A 3e-531AP set up in gateway mode can initiate wireless communic-
ations to the wired network but the wired network can’t initiate commu-
nications to the wireless network unless a specic network address has
been assigned and the user on the wired network knows that address.
The illustration on the following page diagrams the difference.