Maximum Security, Fourth Edition

Chapter 21. Unix

IN THIS CHAPTER

• A Whistle-Stop Tour of Unix History

• Classifying Unix Distributions

• Security Considerations in Choosing a Distribution

• Unix Security Risks

• Breaking set-uid Programs for Fun and Profit

• Rootkits and Defenses

• Host Network Security

• Telnet

• An Essential Tool: Secure Shell

• FTP

• The r Services

• REXEC

• SMTP

• DNS

• finger

• SNMP

• Network File System

• The Caveats of chroot

• Better the Daemon You Know…

• Assessing Your Unix Systems for Vulnerabilities

This chapter examines the Unix operating system from a security perspective. We’ll start with a whistle-stop tour of Unix history, followed by an in-depth look at the issues faced when selecting a Unix distribution. We’ll then consider the security risks and countermeasures—along with some thoughts about the decisions ...