Genie GDVRH-604, GDVRH-616, GDVRH-608 manual Router & Port Forwarding

6.6 Router & Port Forwarding

A majority of networks will often consist of a single IP address which shares internet access through a router. This IP address may be any external (public) static IP address or any dynamic IP address issued by the Internet Service Provider.

The purpose of a router is to enable multiple personal computers and any other devices that require internet connection to access the internet simultaneously. Most routers by default enable (open) commonly used ports so that mainstream applications such as Hypertext Transfer Protocol (HTTP, Port 80), File Transfer Protocol (FTP, Port 21), Telnet (Port 23) and Post Office Protocol 3 (POP3, Port 110) are used.

To solve the firewall problem, and let a visitor into the network, the user instructs the router to allow traffic to pass through on a given port. This is known as Port Forwarding, as the router forwards (directs) all internet requests on a specific port to the local machine. With port forwarding, external visitors are able to connect to the DVR while other internal devices remain protected.

Here is the example of DVR connection.

			PC Connect position					PC Connect position			CF
Network	Router	DVR IP Setting		① LAN			②		WAN
			A		B	C		B		C
		STATIC	○		△			★		★
	use
		DHCP	○		▲			☆		★	Check the DVR IP of info
											and set into Router.
Static IP
		STATIC	○		○	○		○		○
	x
											N/A [Need Local DHCP
		DHCP
											Server]
		STATIC	○		△			★		★
	use
		DHCP	○		△			★		★	Check the DVR IP of info
											and set into Router
DHCP
		STATIC									N/A
	x
		DHCP
								△		△	PPPOE is not supported

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