Troubleshooting OpenVPN

Get the solutions you need to troubleshoot any issue you may face to keep your OpenVPN up and running

Troubleshooting OpenVPN

This ebook is included in a Mapt subscription
Eric F Crist

Get the solutions you need to troubleshoot any issue you may face to keep your OpenVPN up and running
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Book Details

ISBN 139781786461964
Paperback178 pages

Book Description

OpenVPN, the most widely used open source VPN package, allows you to create a secure network across systems, keeping your private data secure. Connectivity and other issues are a pain to deal with, especially if they are impacting your business. This book will help you resolve the issues faced by OpenVPN users and teach the techniques on how to troubleshoot it like a true expert. This book is a one stop solution for troubleshooting any issue related to OpenVPN.

We will start by introducing you to troubleshooting techniques such as Packet Sniffing, Log Parsing, and OpenSSL. You will see how to overcome operating system specific errors. Later on, you will get to know about network and routing errors by exploring the concepts of IPv4 and IPv6 networking issues. You will discover how to overcome these issues to improve the performance of your OpenVPN deployment.

By the end of the book, you will know the best practices, tips, and tricks to ensure the smooth running of your OpenVPN.

Table of Contents

Chapter 1: Troubleshooting Basics
A recommended toolkit
Troubleshooting basics
Summary
Chapter 2: Common Problems
Narrowing the focus
Supported operating systems
IP addresses
Firewalls
Duplicate client certificates
Overcomplication
Summary
Chapter 3: Installing OpenVPN
Common installation problems
Alternative clients
Summary
Chapter 4: The Log File
Logging options
Logging levels
Common log messages
Summary
Chapter 5: Client and Server Startup
File and process permissions
Scripting
UDP troubleshooting
Summary
Chapter 6: Certificates and Authentication
File permissions
Pre-shared keys
Certificate authentication
Authentication and plugins
Summary
Chapter 7: Network and Routing
Connectivity
Firewall filters and inspection
TLS authentication
Routing
General network concerns
Summary
Chapter 8: Performance
Networking
Cryptographic performance
Single thread
Summary
Chapter 9: External Problems
Inspection and filtering
Routing path performance
Summary

What You Will Learn

  • Diagnose and remediate authentication and authorization problems in OpenVPN
  • Overcome simple network and startup script errors
  • Learn OpenVPN log file format and verbosity options
  • Resolve operating system-specific errors
  • Discover various troubleshooting techniques to resolve problems in OpenVPN
  • Improve performance and identify bottlenecks in the network or with hardware
  • Determine external versus internal network issues

Authors

Table of Contents

Chapter 1: Troubleshooting Basics
A recommended toolkit
Troubleshooting basics
Summary
Chapter 2: Common Problems
Narrowing the focus
Supported operating systems
IP addresses
Firewalls
Duplicate client certificates
Overcomplication
Summary
Chapter 3: Installing OpenVPN
Common installation problems
Alternative clients
Summary
Chapter 4: The Log File
Logging options
Logging levels
Common log messages
Summary
Chapter 5: Client and Server Startup
File and process permissions
Scripting
UDP troubleshooting
Summary
Chapter 6: Certificates and Authentication
File permissions
Pre-shared keys
Certificate authentication
Authentication and plugins
Summary
Chapter 7: Network and Routing
Connectivity
Firewall filters and inspection
TLS authentication
Routing
General network concerns
Summary
Chapter 8: Performance
Networking
Cryptographic performance
Single thread
Summary
Chapter 9: External Problems
Inspection and filtering
Routing path performance
Summary

Book Details

ISBN 139781786461964
Paperback178 pages
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