Conducting Network Penetration and Espionage in a Global Environment

Chapter 5

Nmap

Now let’s make use of a tool called Nmap. As you will see, Nmap can tell us many things—or at the very least, put us in a better position than we were. As we go through Nmap you will see that I repeat some explanations of switches and parameters at various intervals. I do that for two reasons. One is so that you don’t have to search around for the explanation again. And the other is to help instill it better in your memory. First, we will put a table in place that we can use for reference:

Nmap Switch	Type of Packet Sent	Response if Open	Response if Closed	Notes
Nmap Switch	Type of Packet Sent	Response if Open	Response if Closed	Notes
-sT	Operating system (OS)-based connect	Connection made ...