Siemens Gigaset Owner's Manual page 42

Configuring the Gigaset Router
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 (Demilitarized
Zone) may expose your local network to a variety of security risks, so only use this
option as a last resort.
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