Linux Administration: A Beginner’s Guide, Seventh Edition, 7th Edition

CHAPTER 15

Network Security

In Chapter 14, you learned that exploit vectors are of two types: those in which the vulnerability is exploitable locally and those in which the vulnerability is exploitable over a network. The latter case is covered in this chapter.

Network security addresses the problem of attackers sending malicious network traffic to your system with the intent of either making your system unavailable (denial-of-service, or DoS, attack) or exploiting weaknesses in your system to gain access or control of the system or other systems. Network security is not a substitute for the good local security practices discussed in the previous chapter. Both local and network security approaches are necessary to keep things working in the expected ...