[Unit]
 Description=Ethernet Bridge Filtering Tables
 ConditionFileIsExecutable=/etc/systemd/scripts/ebtables
 After=network.target
 
 [Service]
 Type=oneshot
 RemainAfterExit=yes
 ExecStart=/etc/systemd/scripts/ebtables start
 ExecStop=/etc/systemd/scripts/ebtables stop
 
 [Install]
 WantedBy=multi-user.target