In this chapter we have learned how to check our OpenVPN and networking setup step-by-step using standard Linux tools and evaluating their output. With tools like ifconfig
, ping
, traceroute
, and mtr
, we could analyze the flow of datagrams between the VPN servers and the connected networks. Programs like tcpdump
, IPTraf, ntop, and Munin will give us detailed information about the current traffic or statistical breakdowns of it. The first place to look for troubleshooting should always be the log file of OpenVPN itself—especially at a higher level of verbosity.
OpenVPN: Building and Integrating Virtual Private Networks
OpenVPN: Building and Integrating Virtual Private Networks
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)
OpenVPN
Credits
About the Author
About the Reviewers
Preface
Free Chapter
VPN—Virtual Private Network
OpenVPN
Installing OpenVPN
Configuring an OpenVPN Server—The First Tunnel
Setting Up OpenVPN with X509 Certificates
The Command openvpn and its Configuration File
Securing OpenVPN Tunnels and Servers
Advanced Certificate Management
Advanced OpenVPN Configuration
Troubleshooting and Monitoring
Index
Customer Reviews