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OPNsense Beginner to Professional

OPNsense Beginner to Professional

By : Camargo
4.3 (8)
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OPNsense Beginner to Professional

OPNsense Beginner to Professional

4.3 (8)
By: Camargo

Overview of this book

OPNsense is one of the most powerful open source firewalls and routing platforms available. With OPNsense, you can now protect networks using features that were only previously available to closed source commercial firewalls. This book is a practical guide to building a comprehensive network defense strategy using OPNsense. You’ll start with the basics, understanding how to install, configure, and protect network resources using native features and additional OPNsense plugins. Next, you’ll explore real-world examples to gain in-depth knowledge of firewalls and network defense. You’ll then focus on boosting your network defense, preventing cyber threats, and improving your knowledge of firewalling using this open source security platform. By the end of this OPNsense book, you’ll be able to install, configure, and manage the OPNsense firewall by making the most of its features.
Table of Contents (25 chapters)
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1
Section 1: Initial Configuration
6
Section 2: Securing the Network
13
Section 3: Going beyond the Firewall

Diagnostics and troubleshooting

Truth has no answer – against facts, it's difficult to argue, so always count on logs and diagnostics tools to help you solve issues related to firewalls. Based on facts, your troubleshooting will be as sharp as a katana (a samurai's sword). As an airplane pilot, aviation experience taught me that things must be checked using a checklist based on facts, and as a firewall administrator, experience has taught me that a firewall will be blamed for network problems in 99.9% of cases. So, don't guess a problem – check it! OPNsense has a lot of tools that can help you with your troubleshooting. In time, users will start relying on just your word and not blame the firewall for any network (or maybe entire internet) problems. This is my advice for you based on a couple of decades of personal experience.

Starting at Diagnostic tools, go to Firewall | the Diagnostics menu:

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