m0n0wall

Democratizing how we access networks through a universal router and open source software. Our vision at VyOS is to dramatically change how we access networks so that we can all build the solutions we always dreamed of, without restrictions, limitations, or prohibitive costs. We fundamentally believe that internet access is as vital to our human development as air, food, water, and healthcare. Built by engineers for engineers, VyOS is an open source software company that democratizes how we access networks so that the many, not the few, benefit from building solutions without limitations and prohibitive fees. We do this as VyOS through our open source software and virtual platforms. Stateful firewalls, zone-based firewall, all types of source and destination NAT (one to one, one to many, many to many). The entire codebase and build toolchain are available to everyone for auditing, building customized images and contributing.

Simple packet filters are becoming a thing of the past. Even the open-source domain is moving towards Next-Generation Firewalls. And OPNsense is a top player when it comes to intrusion detection, application control, web filtering, and anti-virus. No network is too insignificant to be spared by an attacker. Even home networks, washing machines, and smartwatches are threatened and require a secure environment. Firewalls are a component of the security concept. They protect against known and new threats to computers and networks. A firewall offers the highest level of protection if its functions are known, its operation is simple, and it is ideally positioned in the surrounding infrastructure. OPNsense accepts the challenge and meets these criteria in different ways. This book is the ideal companion for understanding, installing and setting up an OPNsense firewall.