If you have a client computer that cannot run an Internet application properly from behind the firewall,
you can open the client to unrestricted two-way Internet access by defining a virtual demilitarised zone (DMZ) host.
Adding a client to the DMZ may expose your local network to a variety of security risks, so be careful when using this option.
Any client computer running in the DMZ must have a static IP address.
To enable a DMZ, click Enable.
Enter the Public IP address of the internet application.
Enter Client PC IP Address of the computer that will access the Iinternet application.
When you have added all the computers that will be DMZs, click Save Settings.
To set your DHCP server least time to Forever, go to Home Network Settings > LAN Settings.