IOGear GWA502 Manual - Manual (Page 59)

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Configuration Utility
Policies
Policies are rules that you define for your firewall
settings. You may define rules, for example, for
inbound and outbound traffic.
Virtual DMZ
If you have a local client computer that cannot run
an Internet application properly from behind the
NAT firewall, you can open the client up to
unrestricted two-way Internet access by defining
a Virtual DMZ.