Sentry Firewall CD HOWTO

Stephen A. Zarkos, Obsid@Sentry.net

1. Introduction

• 1.1 What is the Sentry Firewall CD?
• 1.2 Why would I use a CD-based firewall or server?
• 1.3 I'm a Linux newbie, will the Sentry Firewall CD be a good choice for me?
• 1.4 What's with all these branches(SENTRYCD/SENTRYCD-RH/SENTRYCD-xxx)? What's the difference between the branches?
• 1.5 Minimum Requirements
• 1.6 Copyrights and Disclaimer

2. How the CD Works (Overview)

• 2.1 The Boot Process
• 2.2 ISOLINUX
• 2.3 The CD Configuration Scripts

3. Obtaining the CDROM

• 3.1 Downloading
• 3.2 Purchasing
• 3.3 Burning the CDROM

4. Using the Sentry Firewall CDROM

• 4.1 Introduction
• 4.2 The sentry.conf file
• 4.3 Network Configuration
• 4.4 Other Useful Configuration Directives
• 4.5 Putting it all together, managing multiple nodes from a single location.
• 4.6 Example sentry.conf and disk images

5. Overview of Available Configuration Directives

• 5.1 Replacing rc/config files
• 5.2 'device' directive support
• 5.3 'nameserver' directive
• 5.4 Proxy Support Directives
• 5.5 Passive FTP Support
• 5.6 'include' directive
• 5.7 Copying files (|=)
• 5.8 Making Symlinks (=>)
• 5.9 'cdrom' directive
• 5.10 'cron' directive
• 5.11 hostname
• 5.12 Other SENTRY-{RH,DEB} Specific Directives

6. Setting Up a Firewall

• 6.1 Starting the Firewall
• 6.2 Using FWBuilder with the Sentry Firewall CD
• 6.3 Using Webmin with the Sentry Firewall CD
• 6.4 Other Sample Firewall Scripts and Tools
• 6.5 Links to Other Firewall Resources

7. Troubleshooting

• 7.1 Booting Problems
• 7.2 Configuration Problems
• 7.3 Frequently Asked Questions
• 7.4 Mailing List

8. Building a Custom Sentry CD

• 8.1 Introduction
• 8.2 The development system(How I do it)
• 8.3 The RAMdisk Image
• 8.4 Making the ISO Image

9. More About the Sentry Firewall Project

• 9.1 Goals
• 9.2 Supporting the Project
• 9.3 About the Author
• 9.4 Contacting the Author