Install DNS Ubuntu

https://technet.microsoft.com/en-us/library/aa998082(v=exchg.65).aspx
http://linux.m2osw.com/bind_errors
https://devops.profitbricks.com/tutorials/configure-authoritative-name-server-using-bind-on-centos-6/
https://www.digitalocean.com/community/tutorials/how-to-configure-bind-as-an-authoritative-only-dns-server-on-ubuntu-14-04
http://serverfault.com/questions/310400/cofigure-bind-for-google-apps-mx-record
sudo apt-get update
sudo apt-get install bind9 bind9utils bind9-doc
sudo nano /etc/bind/named.conf.options

options {
        directory "/var/cache/bind";
        recursion no;
        allow-transfer { none; };

        dnssec-validation auto;

        auth-nxdomain no;    # conform to RFC1035
        listen-on-v6 { any; };
};

nano /etc/bind/named.conf.local

zone "example.com" {
    type master;
    file "/etc/bind/zones/db.example.com";
    allow-transfer { 192.0.2.2; };
};

zone "2.0.192.in-addr.arpa" {
    type master;
    file "/etc/bind/zones/db.192.0.2";
};

mkdir /etc/bind/zones
cp /etc/bind/db.local /etc/bind/zones/db.example.com
cp /etc/bind/db.127 /etc/bind/zones/db.192.0.2
nano /etc/bind/zones/db.example.com

$TTL    604800
@       IN      SOA     ns1.example.com. admin.example.com. (
                              5         ; Serial
                         604800         ; Refresh
                          86400         ; Retry
                        2419200         ; Expire
                         604800 )       ; Negative Cache TTL
;

; Name servers
example.com.    IN      NS      ns1.example.com.
example.com.    IN      NS      ns2.example.com.

; A records for name servers
ns1             IN      A       192.0.2.1
ns2             IN      A       192.0.2.2

; Other A records
@               IN      A       192.0.2.3
www             IN      A       192.0.2.3



nano db.192.0.2

$TTL    604800
@       IN      SOA     example.com. admin.example.com. (
                              5         ; Serial
                         604800         ; Refresh
                          86400         ; Retry
                        2419200         ; Expire
                         604800 )       ; Negative Cache TTL
;

; Name servers
        IN      NS      ns1.example.com.
        IN      NS      ns2.example.com.

; PTR records
1       IN      PTR      ns1.example.com.
2       IN      PTR      ns2.example.com.
3       IN      PTR      www.example.com.