TP-Link ADSL2/2+ ETHERNET/USB ROUTER TD-8817B - Manual (Page 31)

TD-8817B ADSL2/2+ Ethernet/USB Router User Guide
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Figure 4-16
¾ Virtual Circuit: Enter Virtual Circuit Index that you plan to setup for the NAT function.
¾ 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 4-4) to activate the function.
¾ 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 4-16, 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.
Figure 4-17
¾ DMZ Host IP Address: Enter the specified IP Address for DMZ host on the LAN side.
4.4.3.2. Virtual Server
Choose “Advanced Setup→NAT→Virtual Server” in Figure 4-16, you can configure the Virtual
Server in the next screen.