Is this 'pf' like the BSD firewall? Anyone more familiar with the space want to provide some detail?
Edit: yeah it is:
> The pfSense project is a free network firewall distribution, based on the FreeBSD operating system with a custom kernel and including third party free software packages for additional functionality.
Yep, basically a really nice web interface and management system for configuring a pf-driven firewall.
You can click your way to high availability with sub 5-second failovers (even including NAT state synchronization) in a morning starting from no pfsense or bsd knowledge.
Edit: yeah it is:
> The pfSense project is a free network firewall distribution, based on the FreeBSD operating system with a custom kernel and including third party free software packages for additional functionality.
From https://pfsense.org/getting-started/ see also https://doc.pfsense.org/index.php/Installing_pfSense