pfSense is one of the most powerful open-source firewalls and routers available. Running it inside VMware Workstation Pro 17 (the current 2025 version) is an excellent way to build a lab or even protect a small home/office network without dedicating physical hardware. This post is detailed so if you're advanced and know what you doing, it will probably not show you much, but for those who starting their career it might be useful. I'm running a nested lab only on a beefed PC from 3 years ago (64Gb of RAM, 16-core AMD...