deploy-hyperledger-cello-on-debian-9
# iptables-restore master-ufw-rules.conf
# bash bin/hardening.sh --audit-all
# bash bin/hardening.sh --set-hardening-level 5
# bash bin/hardening.sh --audit-all
# bash bin/hardening.sh --apply
# iptables-restore worker-ufw-rules.conf
# bash bin/hardening.sh --audit-all
# bash bin/hardening.sh --set-hardening-level 5
# bash bin/hardening.sh --audit-all
# bash bin/hardening.sh --apply