I am not sure if I can confirm this for Ubuntu 18.04, as I don't know if nplan is actually the package being used below the GUI.
However: Using Linux Mint 19 (Ubuntu 18.04) with sysctl configured privacy extensions: net.ipv6.conf.all.use_tempaddr = 2 net.ipv6.conf.default.use_tempaddr = 2 net.ipv6.conf.wlp4s0.use_tempaddr = 2 Settings get completely ignored and no temporary address is created. Only if I open the configuration for the Wifi network I am connected to and set the privacy options under IPv6 I get a temporary address assigned. It seems right now there are two options: (?) - Have nplan follow sysctl settings and keep current Ubuntu documentation - Have new nplan settings for this (e.g. I could not find a global setting anywhere) and update Ubuntu documentation -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1750392 Title: nplan cannot enable IPv6 privacy extensions To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/nplan/+bug/1750392/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs