DNS master zone configuration

apt-get install bind9

rndc reload

....
options {
    ....
    // stop everyone
    allow-transfer {"none";};
    ....
};
zone "example.com" in{
   type master;
   file "master/master.example.com";
   // explicitly allow slave
   allow-transfer {192.168.0.4;};
};

; zone fragment for 'zone name' example.com
; name servers in the same zone
$TTL 2d ; zone default TT = 2 days
$ORIGIN example.com
@              IN      SOA   ns1.example.com. hostmaster.example.com. (
               2003080800 ; serial number
               2h         ; refresh =  2 hours
               15M        ; update retry = 15 minutes
               3W12h      ; expiry = 3 weeks + 12 hours
               2h20M      ; minimum = 2 hours + 20 minutes
               )
; main domain name servers
              IN      NS     ns1.example.com.
              IN      NS     ns2.example.com.
; mail servers for main domain
              IN      MX 10  mail.example.com.
; A records for name servers above
ns1           IN      A      192.168.0.3
ns2           IN      A      192.168.0.4
; A record for mail servers above
mail          IN      A      192.168.0.5
; other domain level hosts and services
bill          IN      A      192.168.0.6
....
; sub-domain definitions
$ORIGIN us.example.com.
              IN      MX 10  mail
; record above could have been written as
; us.example.com.   IN  MX 10 mail.us.example.com.
; A record for subdomain mail server
mail          IN      A      10.10.0.28
; the record above could have been written as
; mail.us.example.com. A 10.10.0.28 if it's less confusing
ftp           IN      A      10.10.0.29
; the record above could have been written as
; ftp.us.example.com. A 10.10.0.29 if it's less confusing
....
; other subdomain definitions as required


; snippet from file above showing use of $INCLUDE
....
; other domain level hosts and services
bill          IN      A      192.168.0.5
....
; sub-domain definitions
$INCLUDE us-subdomain.sub
; other subdomain definitions as required