Chapter 46. Basic Security Measures Every Network Administrator Needs to Know

SOME OF THE MAIN TOPICS IN THIS CHAPTER ARE

Policies and Procedures

Physical Security Measures

The Two Sides of Security

System Daemons and Services

Removing Dead Wood

Delegating Authority

Don't Forget About Firewalls

Keeping a network secure is a time-consuming process that requires a lot of attention to detail. Similar to troubleshooting faulty equipment, maintaining network security is also a time-consuming practice that involves the following:

• Detection of a security breach or network intrusion

• Finding the cause of a security breach

• Finding the method of an intrusion

• Educating users about security on a continual basis

This chapter examines security from two different angles: first, preventive measures that can be used to help keep problems from occurring in the first place, and second, tools and techniques to discover these kinds of problems.