https://tailscale.com/kb/1130/lxc-unprivileged
https://tailscale.com/kb/1019/subnets#connect-to-tailscale-as-a-subnet-router
https://tailscale.com/kb/1320/performance-best-practices#ethtool-configuration
https://www.cyberciti.biz/faq/download-install-ethtool-under-debian-ubuntu-linux/