CEH Certified Ethical Hacker Cert Guide, 4th Edition

Chapter 3

Footprinting, Reconnaissance, and Scanning

This chapter covers the following topics:

• Footprinting: The process of accumulating data about a specific network environment, usually for the purpose of completing the footprinting process, mapping the attack surface, and finding ways to intrude into the environment. Fingerprinting can be categorized as either active or passive. Active fingerprinting is more accurate but also more easily detected. Passive fingerprinting is the act of identifying systems without injecting traffic or packets into the network.

• Scanning: The identification of active machines that is accomplished by means of ping sweeps and port scans. Both aid in an analysis of understanding whether the machine is actively ...