How to set a PC to be a DMZ host? What is the usage?
If a PC is set to be DMZ host, then this PC has all ports open. It is very convenient in the case when one does not know which ports he needs to open for certain applications. To configure it, after login the router, you need to go to General Setup -> Firewall. Then choose Enable, and click Apply. Then choose DMZ, fill in the IP address of the PC, and click Apply.