O'Reilly logo

Network Security, Firewalls, and VPNs by J. Michael Stewart

Stay ahead with the world's most comprehensive technology and business learning platform.

With Safari, you learn the way you learn best. Get unlimited access to videos, live online training, learning paths, books, tutorials, and more.

Start Free Trial

No credit card required

Chapter 4. Network Security Threats and Issues

NETWORK SECURITY IS UNDER CONSTANT ATTACK by threats both internal and external, ranging from disgruntled employees to world-wide hackers. There's no perfect defense because hackers are able to bypass, compromise, or evade almost every safeguard, countermeasure, and security control. Hackers are constantly developing new techniques of attack, writing new exploits, and discovering new vulnerabilities. Network security is a task of constant vigilance, not a project to complete. It's a job that's never done.

Why is understanding hacking, exploitation, vulnerabilities, and attacks critically important? As the sixth century B.C. Chinese general and author Sun Tzu stated in his famous military text The Art ...

With Safari, you learn the way you learn best. Get unlimited access to videos, live online training, learning paths, books, interactive tutorials, and more.

Start Free Trial

No credit card required