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  • Book Overview & Buying OpenVPN: Building and Integrating Virtual Private Networks
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OpenVPN: Building and Integrating Virtual Private Networks

OpenVPN: Building and Integrating Virtual Private Networks

3.5 (8)
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OpenVPN: Building and Integrating Virtual Private Networks

OpenVPN: Building and Integrating Virtual Private Networks

3.5 (8)
Buy this Book

Overview of this book

OpenVPN is a powerful, open source SSL VPN application. It can secure site-to-site connections, WiFi and enterprise-scale remote connections. While being a full-featured VPN solution, OpenVPN is easy to use and does not suffer from the complexity that characterizes other IPSec VPN implementations. It uses the secure and stable TLS/SSL mechanisms for authentication and encryption. This book is an easy introduction to this popular VPN application. After introducing the basics of security and VPN, the book moves on to cover using OpenVPN, from installing it on various platforms, through configuring basic tunnels, to more advanced features, such as using the application with firewalls, routers, proxy servers, and OpenVPN scripting. While providing only necessary theoretical background, the book takes a practical approach, presenting plenty of examples.
Table of Contents (17 chapters)
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OpenVPN
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OpenVPN
Credits
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Credits
About the Author
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About the Author
About the Reviewers
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About the Reviewers
Preface
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Preface
Lock Free Chapter
1
VPN—Virtual Private Network
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VPN—Virtual Private Network
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Branches Connected by Dedicated Lines
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How Does a VPN Work?
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VPN Concepts—Overview
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Summary
2
VPN Security
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VPN Security
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VPN Security
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Privacy—Encrypting the Traffic
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SSL/TLS Security
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Summary
3
OpenVPN
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OpenVPN
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Advantages of OpenVPN
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History of OpenVPN
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Networking with OpenVPN
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OpenVPN Compared to IPsec VPN
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Sources for Help and Documentation
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The Project Community
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Summary
4
Installing OpenVPN
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Installing OpenVPN
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Prerequisites
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Obtaining the Software
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Installing OpenVPN on Windows
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Installing OpenVPN on Mac OS X (Tunnelblick)
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Installing OpenVPN on SuSE Linux
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Installing OpenVPN on Redhat Fedora Using yum
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Installing OpenVPN on RPM-Based Systems
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Installing OpenVPN on Debian
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Installing OpenVPN on FreeBSD
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Troubleshooting—Advanced Installation Methods
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Internet Links, Installation Guidelines, and Help
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Summary
5
Configuring an OpenVPN Server—The First Tunnel
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Configuring an OpenVPN Server—The First Tunnel
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OpenVPN on Microsoft Windows
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Connecting Windows and Linux
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Troubleshooting Firewall Issues
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Summary
6
Setting Up OpenVPN with X509 Certificates
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Setting Up OpenVPN with X509 Certificates
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Creating Certificates
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Certificate Generation on Windows XP with easy-rsa
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Distributing the Files to the VPN Partners
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Configuring OpenVPN to Use Certificates
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Using easy-rsa on Linux
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Troubleshooting
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Summary
7
The Command openvpn and its Configuration File
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The Command openvpn and its Configuration File
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Syntax of openvpn
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Using OpenVPN at the Command Line
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Configuring OpenVPN with Certificates—Simple TLS Mode
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Overview of OpenVPN Parameters
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Important Windows-Specific Options
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Summary
8
Securing OpenVPN Tunnels and Servers
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Securing OpenVPN Tunnels and Servers
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Securing and Stabilizing OpenVPN
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Linux and Firewalls
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Configuring the Windows Firewall for OpenVPN
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Summary
9
Advanced Certificate Management
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Advanced Certificate Management
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Certificate Management and Security
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Installing xca
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Using xca
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Using TinyCA2 to Manage Certificates
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Summary
10
Advanced OpenVPN Configuration
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Advanced OpenVPN Configuration
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Tunneling a Proxy Server and Protecting the Proxy
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Scripting OpenVPN—An Overview
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Using Authentication Methods
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Using a Client Configuration Directory with Per-Client Configurations
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Individual Firewall Rules for Connecting Clients
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Distributed Compilation through VPN Tunnels with distcc
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Ethernet Bridging with OpenVPN
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Automatic Installation for Windows Clients
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Summary
11
Troubleshooting and Monitoring
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Troubleshooting and Monitoring
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Testing the Network Connectivity
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Checking Interfaces, Routing, and Connectivity on the VPN Servers
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Debugging with tcpdump and IPTraf
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Using OpenVPN Protocol and Status Files for Debugging
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Scanning Servers with Nmap
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Monitoring Tools
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Hints to Other Tools
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Summary
1
Index
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Index

Using TinyCA2 to Manage Certificates

TinyCA2 is a very handy tool to accomplish certificate management. It provides extended functions and the possibility to influence the behavior of OpenSSL itself. TinyCA2 is available for OpenSuSE on online repositories; other distributions must look on http://tinyca.sm-zone.net/ for appropriate packages or source code. On OpenSuSE, TinyCA2 can easily be installed using YaST. I also read about a MAC port on http://tinyca2.darwinports.com/, so there should be a version for almost every UNIX/Linux system.

TinyCA2 can be used to create a CA and to import and export CAs, certificates, keys, and revocation lists. It can manage several CAs and will offer the choice of which CA to load on startup, if several CAs are configured.

Importing Our CA

After installation, start TinyCA2 from SuSE's main menu. Select Utilities | Security | tool to manage a Certificate Authority (TinyCA2). TinyCA2 is started and displays an empty window. The icons in the tool bar offer...

CONTINUE READING
83
Tech Concepts
36
Programming languages
73
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OpenVPN: Building and Integrating Virtual Private Networks
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