Problems with “IPv6 Packet Filtering Framework”

If you run UBOS in a container, and during boot, you get a message that says “Failed to start IPv6 Packet Filtering Framework”, or if one of the failed services is ip6tables, chances are that your host operating system does not have IPv6 enabled.

Usually, that requires you to manually load the respective kernel extension. If your host operating system is Arch Linux, simply execute, in the host:

% sudo modprobe ip6_tables

and reboot your container.

To make this permanent, create file /etc/modules-load.d/ip6_tables.conf with the following single line of content:

ip6_tables

and have systemd pick it up by executing:

% sudo systemctl restart systemd-modules-load