ZyXEL Communications NVG2053, Руководство пользователя

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Chapter 12 Network Address Translation (NAT)
NVG2053 User’s Guide
140
12.1.1 What You Can Do in this Chapter
• Use the General screen ( Section 12.2 on page 140 ) to enable NAT and set the
maximum NAT sessions.
• Use the Port Forwarding screen ( Section 12.3 on page 140 ) to forward
incoming service requests to the server(s) on your local network.
12.2 The General NAT Screen
Use this screen to enable NAT. Click Network > NAT > General to open the
following screen.
Figure 60 Network > NAT > General
The following table describes the labels in this screen.
12.3 The NAT Port Forwarding Screen
Use this screen to forward incoming service requests to the server(s) on your local
network and set a default server. You may enter a single port number or a range
of port numbers to be forwarded, and the local IP address of the desired server.
The port number identifies a service; for example, web service is on port 80 and
FTP on port 21. In some cases, such as for unknown services or where one server
Table 44 Network > NAT > General
LABEL DESCRIPTION
NAT Setup
Network
Address
Translation
(NAT)
Network Address Translation (NAT) allows the translation of an Internet
protocol address used within one network (for example a private IP
address used in a local network) to a different IP address known within
another network (for example a public IP address used on the Internet).
Select to enable or disable NAT on the NVG2053.
Max NAT
Session Per
User Specify the highest number of NAT sessions that the NVG2053 will
permit a host to have at one time.
Apply Click Apply to save your changes back to the NVG2053.
Cancel Click Cancel to begin configuring this screen afresh.