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NAT
To facilitate the explanation on how DFL-900 implements NAT and how to use it, we zoom in the left part of Figure 1-4
into Figure 6-1.
6.1
Demands
1.
The number of public IP address allocated to each Internet subscribers is often very limited compared to the number of PCs
in the LAN1. Additionally, public-IP hosts are directly exposed to the Internet and have more chances to be cracked by
intruders.
2.
Internet servers provided by your company may open many ports in default that may be dangerous if exposed to the public
Internet.
6.2
Objectives
1.
Let PC1_1~PC1_5 connect to the Internet.
2.
Let FTPServer1 be accessed by other Internet users.
This chapter introduces NAT and explains how to implement it in DFL-900.
Figure 6-1 Topology for explanations of the NAT examples.
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DFL-900 User Manual
Chapter 6
NAT
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