Hi, Briefly: The Ubuntu 18.04 installer now configures networking properly using netplan¹, and later versions of Ubuntu will continue to do so as long as the default in Ubuntu remains netplan. More detail: There was a recent thread² on the "users" list where a customer had upgraded to Ubuntu 18.04 and was having problems configuring their networking using ifupdown (as configured by /etc/network/interfaces) like they always had. During the course of that discussion it was noted³ that as of Ubuntu 18.04 (Bionic Beaver), Ubuntu now uses netplan to configure networking. BitFolk has been generating an /etc/network/interfaces file using a post-install script in the Ubuntu installer, but this file is no longer consulted for configuring networking in Ubuntu. The installer has now been made to generate a correct netplan config in /etc/netplan/01-netcfg.yaml. We recommend that customers upgrading to Ubuntu 18.04 and beyond switch to netplan for a simpler life. netplan can't currently do everything that ifupdown can, so if you have a complicated networking setup you should look into this carefully. A lot can be done in systemd-networkd hooks instead of ifupdown hooks. The "IPv6" article on the wiki has been updated for the relevant netplan configurations: https://tools.bitfolk.com/wiki/IPv6 Cheers, Andy ¹ https://netplan.io/ ² https://lists.bitfolk.com/lurker/message/20181109.144005.13377548.en.html ³ https://lists.bitfolk.com/lurker/message/20181113.170055.93f45da1.en.html -- https://bitfolk.com/ -- No-nonsense VPS hosting