Nat - Huawei EchoLife HG520 User Manual

4.3.6 NAT

NAT (Network Address Translation) is an Internet standard that
enables a local-area network (LAN) to use one set of IP addresses for
internal traffic and a second set of addresses for external traffic. A NAT
box located where the LAN meets the Internet makes all necessary IP
address translations.
There are three different setting options under the NAT:
DMZ
NAPT
REDIRECT
DMZ (Demilitarized Zone) refers to an isolated area. It is a buffer
area between the non-secure system and the secure system and it is
for the purpose of solving the issue raised when a firewall is installed
and the external networks are blocked to connect to the internal
servers. This demilitarized zone lies between the corporate internal
networks and external networks, in which certain servers, such as
corporate Web servers, FTP servers and corporate bulletin are
located. With the configuration of such DMZ feature, the internal
networks are more securely protected.
Figure 4-15 NAT — DMZ Setting
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