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  3. March 2008

RE: Network config for isolating WiFi

If you can configure the WRT54G to not have a default gateway then it
shouldn't route wireless traffic beyond the subnet that includes the
wireless devices + any wired devices that get DHCP info from the WRT54G.
In fact it probably shouldn't be connected to the LAN & should be used
as a basic WAP.

Dual-NIC the showroom PCs: 1 to the LAN & 1 to the WRT54G. The link to
the WRT can be wired or wireless. Configure the PCs to not bridge the
traffic.

So you have 2 LAN segments:

1. Existing with (PCs) -- (switch) -- (520 & Internet)
2. (scanners) -- (WRT54G) -- (PCs)

You can only admin the WRT from the PCs that are connected to it & not
from outside the showroom.

Other thoughts: Port restrictions & MAC filtering are fine. DHCP is OK
for all devices except the WRT which will use its default or whatever
you hard-code it to. Use WPA2 on the wireless.


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