close
# cat > /etc/systemd/system/iptables.service << EOF [Unit] Before=network.target [Service] Type=oneshot ExecStart=/sbin/iptables -A INPUT -m state --state NEW -m tcp -p tcp --dport 139 -j REJECT RemainAfterExit=yes [Install] WantedBy=multi-user.target EOF # systemctl enable --now iptables.service # systemctl start iptables.service
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