This is set up instructions on now to build netfilter-full-cone-nat for Ubuntu 18.
Tested on Ubuntu 18.04.5 LTS. Kernel used: 4.15. You might need to apt install build-essential
, before starting.
Confirm the kernel configuration option CONFIG_NF_CONNTRACK_EVENTS
is enabled (If this option is disabled on your system, enable it and rebuild your netfilter modules):
# cat /boot/config-`uname -r` | grep CONFIG_NF_CONNTRACK_EVENTS
CONFIG_NF_CONNTRACK_EVENTS=y