How to create a TUN/TAP device at startup using
systemd toolset, on an Ubuntu server?
My need is:
Server starts -> Setup network as usual -> Create TUN/TAP device -> Start
dnsmasq to manage DHCP for new-created TUN/TAP NIC -> Start some VPN server.
systemd-networkd service seems to be disabled by default on Ubuntu server 17.10. Will there be problem (conflict with other network management) if I enable it?