server-name "dns.ubuntu.local";
authoritative;
option domain-name "ubuntu.local";
ddns-update-style none;

default-lease-time 600;
max-lease-time 7200;
option subnet-mask 255.0.0.0;
option broadcast-address 10.255.255.255;
option routers 10.0.0.254;
option domain-name-servers 10.0.0.254;

subnet 10.20.X.0 netmask 255.255.255.0 {
  range 10.20.X.10 10.20.X.20;
}