In this chapter, we reviewed a vast variety of Cisco security solutions and their elements. If selected, deployed, configured, and maintained correctly, these appliances and applications can stop cold the majority of network attacks. This is the aim of Cisco Self-Defending Networks defense- in-depth strategy. On the other hand, Cisco security safeguards can themselves present a target for wily crackers determined to bypass network security countermeasures and hide their tracks. An experienced attacker will study these security solutions with great attention, in the same way a professional cracksman studies safe locks and alarm systems before attempting a major break-in.
Whether you are on the attack or defense side, we hope that you have found these first two chapters useful and are now more aware of the full spectrum and sophistication of the Cisco virtual battleground.