Practical OPNsense: Enterprise firewalls build on open sourceSimple 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