PfSense is a free open-source network firewall and router based on FreeBSD. PfSense is known for its reliability and comes with many features that only commercial firewalls offer. PfSense is included in many third-party free software packages. You can install PfSense on both physical and virtual machines. Appliances are also available.
Installing pfSense on a QNAP NAS
Pfsense Install Iso Download - Colaboratory
Cybersecurity Labs : How to install and configure a Pfsense firewall
Install OpenDNS Umbrella Virtual Appliances on Hyper-V 2012 R2
Firewall Practices with “PfSense” on Your Virtual Home Network Lab
Install Docker on Windows 10 and Windows 11 – 4sysops
How to install the PfSense firewall on a virtual machine – 4sysops
Pfsense Latest Version Iso Download - Colaboratory
How to install the PfSense firewall on a virtual machine – 4sysops
pfSense® software Configuration Recipes — Virtualizing pfSense