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3e-531AP Wireless Access Point
Chapter 4: Gateway Configuration
Introduction
Chapter 3 covered the default configuration of the 3e-531AP Wireless
Access Point as an access point, for use as part of a host wired network.
This chapter covers configuration 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 specific network address has
been assigned and the user on the wired network knows that address.
The illustration on the following page diagrams the difference.
Caution: If you have previously set up your WLAN using
the 3e-531AP devices as access points and you decide to change
the configuration 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 reconfigured system. This is ac-
complished by the following procedure, done on each device
that was configured 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 reconfigures
the MAC address in the wireless device's PC Card so that it is
now visible to the gateway.
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Chapter 4: Gateway Configuration
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