User's Manual Part 2

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6.2 DMZ Host
The DMZ (De-Militarized Zone) function disables the firewall on the
router for one device for a special purpose service such as Internet
gaming or video conferencing. Enabling DMZ host may expose your
local network to potential attacks. So it is advisable to use it with
caution.
1. DMZ Host IP Address: The IP Address of the device for which
the routers firewall will be disabled. Be sure to statically set the
IP address of that device for this function to be consistent.
2. Enable: Check/uncheck to enable/disable the DMZ host feature.
3. OK: Click to enable your settings.
Note: Once enabled, the DMZ host loses protection from device's
firewall and becomes vulnerable to attacks.