No, $ apt-get install ifupdown redo your network config with /etc/network/interfaces and $ apt-get autoremove --purge netplan.io
Does not work if you not purge netplan. If installed, netplan insist to generate volatile config for networkd (/run/systemd/network/10-netplan-your_interface.network) with ipv6 options applied by networkd. It is not a kernel or systemd bug, but another netplan bug. If you do not want to go back to ifupdown, it's time to learn networkd. For server use, netplan is totally useless and only add a layer of potential new problems. -- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux in Ubuntu. https://bugs.launchpad.net/bugs/1771222 Title: Using sysctl to permanently disable IPv6 doesn't have any effect Status in linux package in Ubuntu: Confirmed Bug description: Shows up in version 18.04 of Ubuntu. I added the following 2 lines in /etc/sysctl.d/99-sysctl.conf and /etc/sysctl.d/01-disable-ipv6.conf: ``` net.ipv6.conf.all.disable_ipv6=1 net.ipv6.conf.default.disable_ipv6=1 ``` Rebooting my machine sets those parameters for "all" and "default" but not for the sysctl options of my network interface: ``` net.ipv6.conf.all.disable_ipv6 = 1 net.ipv6.conf.default.disable_ipv6 = 1 net.ipv6.conf.ens160.disable_ipv6 = 0 ``` I use disable_ipv6 above as an example. I've also verified this with the promote_secondaries option of ipv4. I can always restart systemd-sysctl.service at every boot and this will set net.ipv6.conf.ens160.disable_ipv6 to 1. Unfortunately though this won't work for devices that are hot-plugged. Other info: - version signature: Ubuntu 4.15.0-20.21-generic 4.15.17 - lspci is attached To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1771222/+subscriptions -- Mailing list: https://launchpad.net/~kernel-packages Post to : kernel-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~kernel-packages More help : https://help.launchpad.net/ListHelp
