Be forewarned this is some very advanced stuff, and you could put your pfSense in a weird state if you do this wrong, so tread carefully!
- https://jakebillo.com/better-mario-kart ... g-pfsense/
- http://webcache.googleusercontent.com/s ... ent=ubuntu
- https://forum.pfsense.org/index.php?topic=99161.0
Hoping to come back to this later, posting here so I don't lose the info. Hope it helps someone else too