Edimax Technology BR-6478AC - Manual (Page 61)

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IV-9-7. IGMP
IV-9-8. DMZ
A Demilitarized Zone (DMZ) is an isolated area in your local network where
private IP addresses are mapped to specified internet IP addresses, allowing
unrestricted access to the private IP addresses but not to the wider local
network.
You can define a virtual DMZ host here. This is useful for example, if a
network client PC cannot run an application properly from behind an NAT
firewall, since it opens the client up to unrestricted two-way access.