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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

Failover and load balancing

In the past, we used to need a dedicated network appliance to deal with multiple internet connections and guarantee good availability of internet access. One of the best features of a modern firewall is working with multiple WAN connections. OPNsense has incredible features that we'll explore in this chapter so that it can be configured with various internet connections.

Failover

The first scenario we'll explore is the failover configuration; with two or more WAN connections, it is possible to configure OPNsense to change the active internet connection to a backup one automatically. An example of an OPNsense configured with two internet connections is shown in the following topology:

Figure 9.1 – Multi-WAN example scenario

Figure 9.1 – Multi-WAN example scenario

As we can see in the preceding diagram, two WAN connections, A and B, are both connected to the internet and configured on OPNsense. WAN-A is configured in OPNsense as the primary connection...

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