TP-Link Technologies Co. Ltd. TDW8151NV4 Manuale Utente

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TD-W8151N 
150Mbps Wireless N ADSL2+ Modem Router User Guide
 
 
46
 
Figure 4-37 
  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 SetupNATDMZ” in Figure 4-37, 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 4-38 
  DMZ Host IP Address: Enter the specified IP Address for DMZ host on the LAN side. 
4.4.3.2  Virtual Server 
Choose “Advanced SetupNATVirtual Server” in Figure 4-37, you can configure the Virtual 
Server in the next screen.