

«I load ip_tables with modprobe, only to lose it after a reboot»
Write the module name into: /etc/modules-load.d/<name>.conf — on most modern systemd distributions (Ubuntu, Arch, Fedora, etc.) or /etc/modules on Debian-style systems.
OpenRC’s modules-load service reads configuration files from the following locations, in order of precedence /usr/lib/modules-load.d/ /run/modules-load.d/ /etc/modules-load.d/
echo “ip_tables” >/etc/modules-load.d/ip_tables.conf
Nice dual display setup :)