Nat - TP-Link TD-W8901N User Manual

4.4.3 NAT

Choose "Advanced Setup→NAT" menu, you can setup the NAT (Network Address Translation)
function for the Router (shown in Figure 4-28).

Note:
To use the NAT function, the Virtual Circuit should not be configured to Bridge mode. You can
change the mode in Figure 4-6.
 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 (shown in Figure 4-6) to activate the function.
 Number of IPs; This field is to specify how many IPs are provided by your ISP for current VC.
It can be single IP or multiple IPs. We select Multiple to explain.

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.
4.4.3.1 DMZ
Choose "Advanced Setup→NAT→DMZ" in Figure 4-28, you can configure the DMZ host in the
next screen. A DMZ (demilitarized zone) is a host between a private local network and the outside
public network. It prevents outside users from getting direct access to a server that has company
data. Users of the public network outside the company can access to the DMZ host.
TD-W8901N 150Mbps Wireless N ADSL2+ Modem Router User Guide
Figure 4-28
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