1.5. Testbed

Throughout the text we will use the test network shown in Figure 1.1 to perform tests and to demonstrate the operation of the various tunnels and VPNs that we study.

Figure 1.1. The Test Network

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The bsd and laptop hosts run FreeBSD 4.10, the linux and linuxlt hosts run Linux 2.4, and the Solaris host runs Solaris 8 on Intel.

The laptop and linuxlt hosts are shown as dashed because they're both laptops that are plugged into various places on the network as required by the situation. When we discuss a particular example, we will include only the parts of the network that are pertinent to that example.

Although each of these hosts runs some version of UNIX, this book is not about UNIX networking. We are interested in the protocols themselves, not in any particular implementation, so the hosts on which the examples and tests are run is immaterial.