[Unit]
Description=Firewall Rules to Block Remote Access
Before=network-pre.target
Wants=network-pre.target

[Service]
Type=oneshot
ExecStart=/usr/sbin/iptables-restore /etc/iptables/rules.v4
ExecStart=/usr/sbin/ip6tables-restore /etc/iptables/rules.v6
RemainAfterExit=yes

[Install]
WantedBy=multi-user.target