Setup an L2TP/IPSEC VPN On Your Ubitquiti EdgeRouter

The planned follow up to the Ubiquiti UniFi AP deployment/RaspberryPi controller post about running an ELK stack on the controller is on hold; there are no preexisting binaries for the ARM platform and a successful compile from source has eluded me so far.  So instead we’re going to walk through setting up an L2TP/IPSEC VPN…