NETGEAR DGN2000 manual Should be selected only by experienced users

Wireless-N ADSL2+ Modem Router DGN2000 Reference Manual

Table 1-2. Basic Settings screen fields (continued)

Settings		Description
NAT (Net Address Translation)		NAT automatically assigns private IP addresses (10.1.1.x) to
		LAN-connected devices.
		• Enable. Usually NAT is enabled.
		• Disable. This disables NAT, but leaves the firewall active.
		Disable NAT only if you are sure that you do not require it.
		When NAT is disabled, only standard routing is performed
		by this router. Classical routing lets you directly manage the
		IP addresses that the modem router uses. Classical routing
		should be selected only by experienced users*
		• Disable firewall. This disables the firewall in addition to
		disabling NAT. With the firewall disabled, the protections
		usually provided to your network are disabled.
These fields	Router MAC Address	The Ethernet MAC address that will be used by the modem
appear only if no		router on the Internet port. Some ISPs register the Ethernet
login is required.		MAC address of the network interface card in your computer
		when your account is first opened. They will then accept traffic
		only from the MAC address of that computer. This feature
		allows your modem router to masquerade as that computer by
		“cloning” its MAC address.
		• Use Default Address. Use the default MAC address.
		• Use Computer MAC Address. The modem router will
		capture and use the MAC address of the computer that you
		are now using. You must be using the one computer that is
		allowed by the ISP.
		• Use This MAC Address. Enter the MAC address that you
		want to use.

*. Disabling NAT reboots the modem router and resets its configuration settings to the factory defaults. Disable NAT only if you plan to install the modem router in a setting where you will be manually administering the IP address space on the LAN side of the router.

1-10 Connecting Your Router to the Internet

v1.0, July 2008