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Chapter 4: Gateway Configuration
Introduction
Chapter 3 covered the default configuration of the 3e-525A 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 (differen–
tiating 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-525A AP set up in gateway mode can initiate wireless commu-
nications to the wired network but the wired network can't initiate com-
munications 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 us-
ing the 3e-525A AP 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 accomplished by the following procedure, done on each device
that was configured to use the 3e-525A AP 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.
29000132-001 A
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