PLANET WRT-416 - Manual (Page 32)

7.2 DMZ
If you have a local client PC that cannot run an Internet application (e.g. Games) properly from behind the
NAT firewall, then you can open the client up to unrestricted two-way Internet access by defining a DMZ Host.
The DMZ function allows you to re-direct all packets going to your WAN port IP address to a particular IP
address in your LAN. The difference between the virtual server and the DMZ function is that the virtual server
re-directs a particular service/Internet application to a particular LAN client/server, whereas DMZ re-directs all
packets (regardless of services) going to your WAN IP address to a particular LAN client/server.