Objectives

In this chapter, we will look at how to connect our systems to an “external” network—in this case, the Internet. We'll see how to add routes to the systems to make sure they can all connect to the external machines.

We saw earlier in Chapter 11, “Connecting to the Local Area Network,” how to configure systems for a local network. The next task is to extend this and connect them to another, wider, network.

Many companies now have a permanent connection to an external network; that is, something other than the LAN. This may be, for example, a remote part of the company network, or a connection to an Internet Service Provider (ISP), which in turn allows them to connect to the Internet. In simple terms these are all “internets” (i.e., ...

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