150Mbps Wireless N ADSL2/2+ Modem Router
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Chapter 4: Software Configuration
Gateway IP Address: Enter the IP address of the gateway. The gateway is an immediate
neighbor of your ADSL Router that will forward the packet to the destination. On the LAN, the
gateway must be a router on the same segment as your Router; over Internet (WAN), the
gateway must be the IP address of one of the remote nodes.
Metric: Metric represents the cost of transmission for routing purposes. IP Routing uses hop
count as the measurement of cost, with a minimum of 1 for directly connected networks. Enter a
number that approximates the cost for this link. The number need not to be precise, but it must
between 1 and 15. In practice, 2 or 3 is usually a good number.
NAT
Virtual Circuit: Enter Virtual Circuit Index that you plan to setup for the NAT function.
NAT Status: This field shows the current status of the NAT function for the current VC. You can
go to the previous screen to activate the function.
Number of IPs: This field specifies how many IPs are provided by your ISP for current VC. It can
be single IP or multiple IPs.
Note: For VCs with single IP, they share the same DMZ and Virtual Servers; for VCs with multiple
IPs, each VC can set DMZ and Virtual Servers. Furthermore, for VCs with multiple IPs, they can
define the Address Mapping rules; for VCs with single IP, since they have only one IP, there is no
need to individually define the Address Mapping rule.
DMZ
A DMZ (demilitarized zone) is a host between a private local network and the outside public
network. Users of the public network outside the company can access to the DMZ h
ost.
It allows
you to expose one network user to the internet for some special-purpose service such as
internet gaming or video conferencing. DMZ hosting forwards all the ports at the same time to
one computer. You should assign a static IP address to the destination computer before you use
this feature.
