firmware/src/packages/fff/fff-node/files/usr/lib/firewall.d/06-disable-forwarding

nft -f - <<__EOF
table ip filter {
	chain FORWARD {
		type filter hook forward priority filter; policy drop;
	}
}
table ip6 filter {
	chain FORWARD {
		type filter hook forward priority filter; policy drop;
	}
}
__EOF