Something

[root@dev named]# cat /etc/dhcpd.conf
ddns-update-style interim;
ddns-updates on;

option thinsrv code 193 = array of ip-address;

include "/etc/rndc.key";

zone dhcp.int.qx21.net. {
        primary localhost;
        key rndc-key;
        }

zone 170.17.172.in-addr.arpa. {
        primary localhost;
        key rndc-key;
}

subnet 172.17.170.0 netmask 255.255.255.0 {
        authoritative;
        pool {
                range 172.17.170.10 172.17.170.89;
                range 172.17.170.100 172.17.170.199;
                deny dynamic bootp clients;
        }
        option ntp-servers 203.80.162.35;
        option routers 172.17.170.1;
        option domain-name-servers 172.17.172.244,172.17.170.245;
        option netbios-name-servers 172.17.172.244,172.17.170.245;
        option thinsrv 172.17.170.244;
        next-server 172.17.170.249;
        option tftp-server-name "172.17.172.244";
        option domain-name "dhcp.int.qx21.net";
        server-identifier 172.17.170.245;
        filename "/pxelinux.0";
        default-lease-time 86400;
        max-lease-time 129600;
}

[root@dev named]#


[root@dev named]# cat /etc/rndc.key
key rndc-key {
        algorithm hmac-md5;
        secret "aIrxwac1lKk/WOMM8szzJA==";
        };

[root@dev named]#


[root@dev named]# cat /etc/named.conf
acl com0.int.qx21.net {
        172.17.172.244/32;
        };
acl dev.int.qx21.net {
        172.17.170.245/32;
        };

include "/etc/rndc.key";

options {
        directory "/var/named";
        dump-file "/var/named/data/cache_dump.db";
        statistics-file "/var/named/data/named_stats.txt";
        forward only;
        forwarders {
                203.80.162.51;
                203.80.162.50;
                };
};

controls {
        inet 127.0.0.1 allow { localhost; } keys { rndc-key; };
        inet 172.17.170.245 allow { "com0.int.qx21.net"; } keys { rndc-key; };
};

zone "." IN {
        type hint;
        file "named.ca";
};

zone "localhost" IN {
        type master;
        file "localhost.zone";
        allow-update { none; };
};

zone "0.0.127.in-addr.arpa" IN {
        type master;
        file "named.local";
        allow-update { none; };
};

zone "0.in-addr.arpa" IN {
        type master;
        file "named.zero";
        allow-update { none; };
};

zone "170.17.172.in-addr.arpa" {
        type master;
        file "/var/named/172.17.170.rev";
        allow-update {key rndc-key; } ;
        notify explicit;
        also-notify {172.17.172.244;};
        };

zone "171.17.172.in-addr.arpa" {
        type master;
        file "/var/named/172.17.171.rev";
        };

zone "170.17.172.int.qx21.net" {
        type master;
        file "/var/named/170.17.172.int.qx21.net.hosts";
        };

zone "171.17.172.int.qx21.net" {
        type master;
        file "/var/named/171.17.172.int.qx21.net.hosts";
        };

zone "18.198.in-addr.arpa" {
        type forward;
        forwarders {
                198.18.2.4;
                };
        };

zone "19.198.in-addr.arpa" {
        type forward;
        forwarders {
                198.18.2.4;
                };
        };

zone "qx21.net" {
        type forward;
        forwarders {
                198.18.2.4;
                };
        };

zone "dhcp.int.qx21.net" {
        type master;
        file "/var/named/dhcp.int.qx21.net.hosts";
        notify explicit;
        also-notify {172.17.172.244;};
        allow-update {
                key rndc-key;
                };
        };

[root@dev named]#













[root@com0 ~]# cat /etc/rndc.key
key rndc-key {
        algorithm hmac-md5;
        secret "aIrxwac1lKk/WOMM8szzJA==";
        };

[root@com0 ~]#

[root@com0 named]# cat /etc/named.conf
acl com0.int.qx21.net {
        172.17.172.244/32;
        };
acl dev.int.qx21.net {
        172.17.170.245/32;
        };

options {
        directory "/var/named";
        dump-file "/var/named/data/cache_dump.db";
        statistics-file "/var/named/data/named_stats.txt";
        forward only;
        forwarders {
                203.80.162.51;
                203.80.162.50;
                };
};

controls {
        inet 127.0.0.1 allow { localhost; } keys { rndc-key; };
        inet 172.17.172.244 allow { "dev.int.qx21.net"; } keys { rndc-key; };
};

zone "." IN {
        type hint;
        file "named.ca";
};

zone "localhost" IN {
        type master;
        file "localhost.zone";
        allow-update { none; };
};

zone "0.0.127.in-addr.arpa" IN {
        type master;
        file "named.local";
        allow-update { none; };
};

zone "0.in-addr.arpa" IN {
        type master;
        file "named.zero";
        allow-update { none; };
};

include "/etc/rndc.key";

zone "170.17.172.in-addr.arpa" {
        type master;
        file "/var/named/172.17.170.rev";
        allow-update {key rndc-key; } ;
        notify explicit;
        also-notify {172.17.170.245;};
        };

zone "171.17.172.in-addr.arpa" {
        type master;
        file "/var/named/172.17.171.rev";
        };

zone "170.17.172.int.qx21.net" {
        type master;
        file "/var/named/170.17.172.int.qx21.net.hosts";
        };

zone "171.17.172.int.qx21.net" {
        type master;
        file "/var/named/171.17.172.int.qx21.net.hosts";
        };

zone "18.198.in-addr.arpa" {
        type forward;
        forwarders {
                198.18.2.4;
                };
        };

zone "19.198.in-addr.arpa" {
        type forward;
        forwarders {
                198.18.2.4;
                };
        };

zone "qx21.net" {
        type forward;
        forwarders {
                198.18.2.4;
                };
        };

zone "dhcp.int.qx21.net" {
        type master;
        file "/var/named/dhcp.int.qx21.net.hosts";
        notify explicit;
        also-notify {172.17.170.245;};
        allow-update {
                key rndc-key;
                };
        };

[root@com0 named]#