[Unit]
Description=Packet Filtering Framework

[Service]
Type=oneshot
ExecStart=/usr/bin/iptables-restore /etc/iptables/iptables.rules
ExecReload=/usr/bin/iptables-restore /etc/iptables/iptables.rules
ExecStop=/usr/lib/systemd/scripts/iptables-flush
RemainAfterExit=yes

[Install]
WantedBy=multi-user.target