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Configuring IPCop Firewalls: Closing Borders with Open Source

Barrie Dempster, James Eaton-Lee

How to setup, configure and manage your Linux firewall, web proxy, DHCP, DNS, time server, and VPN with this powerful Open Source solution
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Book Details

ISBN 139781904811367
Paperback244 pages

About This Book

  • Learn how to install, configure, and set up IPCop on your Linux servers
  • Use IPCop as a web proxy, DHCP, DNS, time server, and VPN
  • Advanced add-on management

Who This Book Is For

Anyone interested in securing their networks with IPCop — from those new to networking and firewalls, to networking and IT Professionals with previous experience of IPCop. No knowledge of Linux or IPCop is required. 

Table of Contents

Chapter 1: Introduction to Firewalls
An Introduction to (TCP/IP) Networking
The Purpose of Firewalls
The OSI Model
How Networks are Structured
Traffic Filtering
Other Services Sometimes Run on Firewalls
Chapter 2: Introduction to IPCop
Free and Open Source Software
The Purpose of IPCop
The Benefits of Building on Stable Components
The Gap IPCop Fills
Features of IPCop
Virtual Private Networking
Why IPCop?
Chapter 3: Deploying IPCop and Designing a Network
Trust Relationships between the Interfaces
Altering IPCop Functionality
Topology One: NAT Firewall
Topology Two: NAT Firewall with DMZ
Topology Three: NAT Firewall with DMZ and Wireless
Planning Site-To-Site VPN Topologies
Chapter 4: Installing IPCop
Hardware Requirements
Other Hardware Considerations
The Installation Procedure
Green Interface Configuration
First Boot
Chapter 5: Basic IPCop Usage
The System Menu
Checking the Status of Our IPCop Firewall
Network Status
Firewall Functionality
Chapter 6: Intrusion Detection with IPCop
Introduction to IDS
Introduction to Snort
Do We Need an IDS?
How Does an IDS Work?
Using Snort with IPCop
Monitoring the Logs
Log Analysis Options
What to Do Next?
Chapter 7: Virtual Private Networks
What is a VPN?
Chapter 8: Managing Bandwidth with IPCop
The Bandwidth Problem
The HTTP Problem
The Solutions: Proxying and Caching
Introduction to Squid
Configuring Squid
Cache Management
Managing Bandwidth without a Cache
Chapter 9: Customizing IPCop
Firewall Addons Server
Common Addons
Chapter 10: Testing, Auditing, and Hardening IPCop
Security and Patch Management
Basic Firewall Hardening
Advanced Hardening
Logfiles and Monitoring Usage
Usage and Denial of Service
Where to Go Next?
Chapter 11: IPCop Support

What You Will Learn

Chapter 1 briefly introduces some firewall and networking concepts. The chapter introduces the roles of several common networking devices and explains how firewalls fit into this.

Chapter 2 introduces the IPCop package itself, discussing how IPCop's red/orange/blue/green interfaces fit into a network topology. It then covers the configuration of IPCop in other common roles, such as those of a web proxy, DHCP, DNS, time, and VPN server.

Chapter 3 covers three sample scenarios where we learn how to deploy IPCop, how IPCop interfaces connect to each other and to the network as a whole.

Chapter 4 covers installing IPCop. It outlines the system configuration required to run IPCop, and explains the configuration required to get IPCop up and running.

In Chapter 5, we will learn how to employ the various tools IPCop provides us with to administrate, operate, troubleshoot, and monitor our IPCop firewall

Chapter 6 starts off with explaining the need for an IDS in our system and then goes on to explain how to use the SNORT IDS with IPCop.

Chapter 7 introduces the VPN concept and explains how to set up an IPSec VPN configuration for a system. Special focus is laid on configuring the blue zone — a secured wireless network augmenting the security of a wireless segment, even one already using WEP or WPA.

Chapter 8 demonstrates how to manage bandwidth using IPCop making use of traffic shaping techniques and cache management. The chapter also covers the configuration of the Squid web proxy and caching system.

Chapter 9 focuses on the vast range of add-ons available to configure IPCop to suit our needs. We see how to install add-ons and then learn more about common add-ons like SquidGuard, Enhanced Filtering, Blue Access, LogSend, and CopFilter.  

Chapter 10 covers IPCop security risks, patch management and some security and auditing tools and tests.

Chapter 11 outlines the support IPCop users have in the form of mailing lists and IRC.

In Detail

IPCop is a powerful, open source, Linux based firewall distribution for primarily Small Office Or Home (SOHO) networks, although it can be used in larger networks. It provides most of the features that you would expect a modern firewall to have, and what is most important is that it sets this all up for you in a highly automated and simplified way.
This book is an easy introduction to this popular application. After introducing and explaining the foundations of firewalling and networking and why they're important, the book moves on to cover using IPCop, from installing it, through configuring it, to more advanced features, such as configuring IPCop to work as an IDS, VPN and using it for bandwidth management. While providing necessary theoretical background, the book takes a practical approach, presenting sample configurations for home users, small businesses, and large businesses. The book contains plenty of illustrative examples.


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