--- /dev/null
+[Unit]
+Description=Dynamic DNS updater
+Requires=network.target
+After=network.target
+
+[Service]
+User=bind
+Type=simple
+PIDFile=/var/run/ddns.pid
+ExecStart=/usr/local/bin/ddns
+Restart=always
+RestartSec=30s
+
+[Install]
+WantedBy=multi-user.target