Next Section: Introduction to Linux Security >

---

Table of Contents - Linux Security for Beginners

• 1. Introduction to Linux Security
• 1.1 Do I need to worry about Security?
• 1.2 The "Hacker" Word
• 1.3 Security and Linux

• 2. Firewalls - The First Line of Defense
• 2.1 What exactly is a Firewall?
• 2.2 How a Firewall Works
• 2.2.1 Stealth Mode - Discarding Pings
• 2.2.2 Port Forwarding and Blocking
• 2.2.3 Packet Filtering
  
• 2.3 Configuring a Typical Router based Firewall
• 2.3.1 Enable Your Firewall
• 2.3.2 Port Forwarding
• 2.3.3 Discard Pings
• 2.3.4 Application Triggered Port Forwarding
• 2.3.5 DMZ - The Demiliterized Zone

• 3. Understanding Linux Services
• 3.1 Web Server - httpd - Port 80
• 3.2 Remote Login - telnet - Port 25
• 3.3 Secure Remote Login - ssh - Port 22
  
• 3.4 File Transfer - ftp - Port 21
• 3.5 Mail Transfer - SMTP - Port 25

• 4. Configuring Linux Services and Runlevels
• 4.1 Linux Init and Runlevels
• 4.2 Confiiguring Linux Services

• 5. Linux Firewall - The Second Line of Defense
• 5.1 The lokkit Command
• 5.2 Graphical Firewall Configuration Tools

• 6. Linux and Wireless Security
• 6.1 An Introduction to Wireless Security
• 6.2 What is Encryption?
• 6.3 Configuring Linux Wireless Security
• 6.3.1 Configuring the Wireless Base Station
• 6.4 Wireless Security on Linux
• 6.5 Setting up Linux Wireless Encryption
• 6.5.1 Entering Wireless Encryption Keys

Next Section: Introduction to Linux Security >