# /etc/systemd/system/hans.service
[Unit]
Description=IP over ICMP
After=network.target

[Service]
EnvironmentFile=/etc/default/hans
ExecStartPre=/bin/ping -c 1 $SERVER
ExecStart=/usr/local/bin/hans -f -c $SERVER -p $PASSWORD
ExecStartPost=/bin/sleep 5
ExecStartPost=-/sbin/ip route add $SERVER via $GATEWAY
ExecStartPost=/sbin/ip route add 0.0.0.0/1 dev tun0
ExecStartPost=/sbin/ip route add 128.0.0.0/1 dev tun0
Restart=on-failure

[Install]
WantedBy=multi-user.target