Rock960 Ubuntu firewall


Hi all,
I just bought this board for testing purposes and started playing with the Ubuntu image.
When I started looking at the firewall, for example trying the command sudo iptables -L to get the list of rules, I got the following exception

modprobe: ERROR: ../libkmod/libkmod.c:586 kmod_search_moddep() could not open moddep file '/lib/modules/4.4.103/modules.dep.bin'
modprobe: FATAL: Module ip_tables not found in directory /lib/modules/4.4.103
iptables v1.6.0: can't initialize iptables table `filter': Table does not exist (do you need to insmod?)
Perhaps iptables or your kernel needs to be upgraded.

Does anyone did some testing with the firewall?
What can I do in order to have it working? I’ve tried to see if there are available modules with asmod, but there are any.

Best regards,