D-Link DIR-655 manual Firewall Settings

Section 3 - Configuration

Firewall Settings

A firewall protects your network from the outside world. The D-Link DIR-655 offers a firewall type functionality. The SPI feature helps prevent cyber attacks. Sometimes you may want a computer exposed to the outside world for certain types of applications. If you choose to expose a computer, you cam enable DMZ. DMZ is short for Demilitarized Zone. This option will expose the chosen computer completely to the outside world.

	Enable SPI: SPI (Stateful Packet Inspection, also known as dynamic packet
		filtering) helps to prevent cyber attacks by tracking more state per
		session. It validates that the traffic passing through the session
		conforms to the protocol.
	NAT Endpoint	Select one of the following for TCP and UDP ports:
	Filtering: Endpoint Independent - Any incoming traffic sent to an open port
		will be forwarded to the application that opened the port. The port
		will close if idle for 5 minutes.
		Address Restricted - Incoming traffic must match the IP address
		of the outgoing connection.
		Address + Port Restriction - Incoming traffic must match the IP
		address and port of the outgoing connection.
Enable DMZ Host: If an application has trouble working from behind the router, you
		can expose one computer to the Internet and run the application
		on that computer.
		Note: Placing a computer in the DMZ may expose that computer to
		a variety of security risks. Use of this option is only recommended
		as a last resort.
	IP Address: Specify the IP address of the computer on the LAN that you want to
		have unrestricted Internet communication. If this computer obtains
		it’s IP address automatically using DHCP, be sure to make a static
		reservation on the Basic > DHCP page so that the IP address of
		the DMZ machine does not change.
	D-Link DIR-655 User Manual		41