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[Unit] Description=Packet Filtering Framework [Service] Type=oneshot ExecStart=/usr/sbin/iptables-restore /etc/iptables/iptables.rules ExecReload=/usr/sbin/iptables-restore /etc/iptables/iptables.rules ExecStop=/usr/lib/systemd/scripts/iptables-flush RemainAfterExit=yes [Install] WantedBy=multi-user.target