Something

# Basic stuff to name the server and switch on updating
server-identifier           Iron-Eagle;
ddns-updates                on;
ddns-update-style           interim;
ddns-domainname             "mydomain.";
ddns-rev-domainname         "in-addr.arpa.";
ignore                      client-updates;

# This is the key so that DHCP can authenticate it's self to BIND9
include                     "/etc/bind/rndc.key";

# This is the communication zone
zone mydomain. {
    primary 127.0.0.1;
    key rndc-key;
}

# Normal DHCP stuff
option domain-name              "mydomain.";
option domain-name-servers      192.168.0.60, 192.168.0.1;
option ntp-servers              192.168.0.60;
option ip-forwarding            off;

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

log-facility local7;

subnet 192.168.0.0 netmask 255.255.255.0 {
    range                       192.168.0.100 192.168.0.200;
    option broadcast-address    192.168.0.255;
    option routers              192.168.0.1;
    allow                       unknown-clients;

    zone    0.168.192.in-addr.arpa. {
            primary 192.168.0.60;
            key             "rndc-key";
    }

    zone    localdomain. {
            primary 192.168.0.60;
            key             "rndc-key";
    }
}