The first thing we will encounter from the testing position of an external attacker is most likely a router. There is a chance it will be an appliance, but since we work mainly from the standpoint of building ranges for testing, it is unlikely we will be able to carry around a device with us. We have shown places to get devices earlier in the book; so, if you have the luxury of this, you can build your own stationary lab from the information we have provided.

The external architecture we built in the last chapter is our foundation for all of the testing we will practice. An example of our layered architecture is shown in the following diagram:

The previous diagram shows our entire external architecture, and the first thing that we encounter is the router; therefore, it is the first device we will use to perform our testing against.

As we have done in the past throughout the book, we want to concentrate on the area of the architecture that we will deal with at the given point...