two example of dhcp config file for white list (mac addr) in linux

dhcp-white-list

#
# DHCP Server Configuration file.
#   see /usr/share/doc/dhcp*/dhcpd.conf.sample
#   see 'man 5 dhcpd.conf'
#
ddns-update-style interim;
ignore client-updates;
next-server 192.168.1.160;
filename "/pxelinux.0";

option routers 192.168.1.1;
option domain-name "ustack.com";
option domain-name-servers 114.114.114.114;
default-lease-time 600;
max-lease-time 7200;

subnet 192.168.1.0 netmask 255.255.255.0 {

        range 192.168.1.100 192.168.1.250;
}

host test-hk {
      option host-name "testks.celtics";
      hardware ethernet 00:0c:29:d9:07:a2;
      fixed-address 192.168.1.235;
}

gistfile1.txt

#
# DHCP Server Configuration file.
#   see /usr/share/doc/dhcp*/dhcpd.conf.sample
#   see 'man 5 dhcpd.conf'
#
ddns-update-style interim;
ignore client-updates;
next-server 192.168.1.160;
filename "/pxelinux.0";

option routers 192.168.1.1;
option domain-name "ustack.com";
option domain-name-servers 114.114.114.114;
default-lease-time 600;
max-lease-time 7200;

subnet 192.168.1.0 netmask 255.255.255.0 {

class "clients" {
        # mac is 48 bit, or 6 Byte, so that is 6 here.
        match if substring (hardware,1,6) = 00:0c:29:d9:07:a2;
}
pool {
        range 192.168.1.100 192.168.1.250;
        allow members of "clients";
}
}