Something

subnet 192.168.17.0 netmask 255.255.255.0 {
        range 192.168.17.200 192.168.17.240;
        range dynamic-bootp 192.168.17.241 192.168.17.254;
        option routers 192.168.17.1;
        option domain-name "lords.devnull.de";
        zone lors.devnull.de. { primary 192.168.16.2; key DDNS_UPDATE; }
        zone 17.168.192.in-addr.arpa. { primary 192.168.16.2; key DDNS_UPDATE; }
}