How I repurposed an old Raspberry Pi into a travel router | Digital Trends
Setup a Raspberry Pi VPN Server - The Geek Pub
Last night I finished my Raspberry Pi VPN router for my home network, complete with a kill switch for whenever I need to switch to clean network. : r/VPN
Raspberry Pi as a router using a single network interface
pi 2 - VPN Passthrough two ethernet interface - Raspberry Pi Stack Exchange