Upgrading and Repairing Networks (5th Edition)

SOME OF THE MAIN TOPICS IN THIS CHAPTER ARE

Policies and Procedures 810

Physical Security Measures 816

The Two Sides of Security 817

System Daemons and Services 822

Removing Dead Wood 823

Delegating Authority 823

Don't Forget About Firewalls 825

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.