Philips CPWBS001 - Manual (Page 52)

DMZ (Demilitarized Zone)
If you have a client PC that cannot run an Internet application properly
from behind the firewall, then you can open the client up to unrestricted
two-way Internet access. Enter the IP address of a DMZ host to 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.
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