iptables on kernel 5.1.x

[Nicolas Bock <nicolasbock@xxxxxxxxx>]

Hi,

I load firewall rules via iptables-restore early on during boot. 
Up to kernel and including 5.0.x this works flawlessly, however, 
switching to kernel 5.1.x (I tried several versions) the relevant 
kernel modules are not loaded on `iptables-restore` anymore and 
the command fails. After manually loading the modules, iptables 
(1.8.3) complains that it 'can not initialize: no child 
processes'. So far I haven't found a way to use iptables in any 
way on 5.1.x.

Was the iptables interface deprecated/removed in 5.1.x? Or am I 
missing something?

Thanks!

Nick