named config. This is can be used to add private records to a domain.

Named Config

//
// named.conf
//
// Provided by Red Hat bind package to configure the ISC BIND named(8) DNS
// server as a caching only nameserver (as a localhost DNS resolver only).
//
// See /usr/share/doc/bind*/sample/ for example named configuration files.
//

options {
	listen-on port 53 { localnets; };
	listen-on-v6 port 53 { localnets; };
	directory 	"/var/named";
	dump-file 	"/var/named/data/cache_dump.db";
        statistics-file "/var/named/data/named_stats.txt";
        memstatistics-file "/var/named/data/named_mem_stats.txt";
	allow-query     { localnets; };
	allow-query-cache { localnets; };
	recursion no; //default yes

	dnssec-enable yes;
	dnssec-validation yes;
	dnssec-lookaside auto;

	/* Path to ISC DLV key */
	bindkeys-file "/etc/named.iscdlv.key";

	managed-keys-directory "/var/named/dynamic";
};

logging {
        channel default_debug {
                file "data/named.run";
                severity dynamic;
        };
};


view "internal" {
        /* This view will contain zones you want to serve only to "internal" clients
         * that connect via your directly attached LAN interfaces - "localnets" .
         */

       	match-clients           { localnets; };
        recursion yes;

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

	/* these are zones that contain definitions for all the localhost
         * names and addresses, as recommended in RFC1912 - these names should
         * not leak to the other nameservers:
         */
	include "/etc/named.rfc1912.zones";
	include "/etc/named.root.key";

        // These are our "authoritative" internal zones

        zone "internal.mydomain.ca" {
                type master;
                file "db.internal.mydomain.ca";
        };

        zone "private.mydomain.ca" {
                type master;
                file "db.private.mydomain.ca";
        };

        zone "10.0.0.in-addr.arpa" {
                type master;
                file "db.10.0.0.in-addr.arpa";
        };                
};


//
// /var/named/db.internal.mydomain.ca
//
$TTL 1D
@ IN SOA internal.mydomain.ca. admin.mydomain.ca. 1 3H 15M 1W 1D
	IN NS 		@
@	IN A		10.0.0.15

//
// /var/named/db.private.mydomain.ca
//
$TTL 1D
@ IN SOA private.mydomain.ca. admin.mydomain.ca. 1 3H 15M 1W 1D
	IN NS 		@
@	IN A		10.0.0.16

//
// /var/named/db.10.0.0.in-addr.arpa
//
$TTL 1d
@ IN SOA internal.mydomain.ca. admin.mydomain.ca. 1 3H 15M 1W 1D
	IN NS 		internal.mydomain.ca.
15 	IN PTR 		internal.mydomain.ca.
16      IN PRT          private.mydomain.ca.