Maximum Security, Third Edition

Chapter 20. 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 ...