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ECURITY
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DMZ
If you have a client PC that cannot run an Internet application properly 
from behind the firewall, you can open the client up to unrestricted 
two-way Internet access. Enter the IP address of a DMZ (Demilitarized 
Zone) host on this screen. Adding a client to the DMZ may expose 
your local network to a variety of security risks, so only use this option 
as a last resort.