isc-dhcp-server

Configure

• /etc/dhcp/dhcpd.conf

option domain-name "sub.domain.tld";
option domain-name-servers 1.2.3.200;

default-lease-time 600;
max-lease-time 7200;

authoritative;

subnet 1.2.3.0 netmask 255.255.255.0 {
    range 1.2.3.123 1.2.3.128;
}
host name {
    hardware ethernet 01:23:45:67:89:ab;
    fixed-address 1.2.3.4;
}