The module needed to magically make this work is 'bpfilter.ko'.
So at least one solution for this is to move bpfilter.ko from the linux-modules-extra to linux-modules.
Currently linux-modules-extra-4.18.0-7-generic but we would want it in linux-modules-4.18.0-7-generic.
bpfilter is described at https://lwn.net/Articles/747551/
The module needed to magically make this work is 'bpfilter.ko'.
So at least one solution for this is to move bpfilter.ko from
the linux-modules-extra to linux-modules.
Currently linux-modules- extra-4. 18.0-7- generic but we would want it 4.18.0- 7-generic.
in linux-modules-
bpfilter is described at https:/ /lwn.net/ Articles/ 747551/