[Unit]
Description=Challenge
After=network.target
Wants=network.target

[Service]
Type=simple
ExecStartPre=/usr/sbin/iptables --flush
ExecStartPre=/usr/sbin/ipset destroy
ExecStartPre=/usr/sbin/ipset restore -f /ipset.save
ExecStartPre=/usr/sbin/iptables-restore /iptables.save
ExecStart=/usr/bin/python3 /flagger.py
Restart=on-failure
RestartSec=5s

[Install]
WantedBy=multi-user.target