Zte MF275R User Manual page 55

DMZ
The DMZ, or De-Militarized Zone, is a selected internal IP
address of a device that allows full access and connectivity
from outside traffic, through the firewall, to a specific
internal device without being filtered or blocked by your
device.
Select Settings > Firewall > DMZ and the following page
will appear:
If you select Enable, the DMZ Settings will appear:
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