DMZ HOST :
DMZ (Demilitarized Zone) option provides you with an option to set a
single computer on your network outside of the router. If you have a
computer that cannot run Internet applications successfully from behind
the router, then you can place the computer into the DMZ for
unrestricted Internet access.
Note: Putting a computer in the DMZ may expose that
computer to a variety of security risks. Use of this option is only
recommended as a last resort.