ZyXEL N4100 Guia Do Utilizador
N4100 User’s Guide
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H A P T E R
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LAN Devices
19.1 Overview
NAT (Network Address Translation - NAT, RFC 1631) is the translation of the IP
address of a host in a packet. For example, the source address of an outgoing
packet, used within one network is changed to a different IP address known within
another network.
address of a host in a packet. For example, the source address of an outgoing
packet, used within one network is changed to a different IP address known within
another network.
Traditionally, when you have a device (for example, a switch) on a LAN using NAT,
you cannot access the device from the WAN since the LAN device is assigned a
private IP address.
you cannot access the device from the WAN since the LAN device is assigned a
private IP address.
Your N4100 is a NAT-enabled device that makes your whole inside network appear
as a single computer to the outside world.
as a single computer to the outside world.
This chapter describes how you can remotely access devices on the LAN through
the N4100.
the N4100.
19.1.1 What You Can Do in this Chapter
Use the LAN Devices screen (
) to configure port
mapping on the N4100.
19.1.2 What You Need to Know
The following terms and concepts may help as you read through this chapter.
Port Mapping
To make LAN devices behind the N4100 visible to the outside world, you configure
a mapping between a virtual port on the N4100 and a server port on a LAN device.
A virtual port is a port on the N4100 that appears as a physical port to the
attached devices. A server port defines a server to which all specified requests are
forwarded.
a mapping between a virtual port on the N4100 and a server port on a LAN device.
A virtual port is a port on the N4100 that appears as a physical port to the
attached devices. A server port defines a server to which all specified requests are
forwarded.