pfSense-On-A-Stick - 802.1Q Trunking With pfSense 2.0 RC1 and Mikrotik RouterBoard RB250G Smart Gigabit Switch with five ports and SwOS v1.5 - Stefcho's Tech Blog
pfSense on the Stick - OpenTechTips
Cisco Layer 3 Switch Inter-VLAN Routing Without Router | by Vladyslav Diadenko | Medium
Help with vlan+bridges in Linux virtual environment (running PfSense) : r/homelab
How Do VLANs Work? Exploring the 802.1q Protocol
Router on a Stick for pfSense - Networking & Firewalls - Lawrence Systems Forums