I have a dedicated server and i have DNS and web server on the same server. To configure the DNS i have used `BIND` ... BIND comes with default configuration for localhost like `127, 0 , 255 and localhost`. I have removed the `type:hint` part that is used for caching.

my doubt is that 

1. do i really require these configuration as my DNS is `Authorative Only` and if i require these config are they Authrorative only or are they Caching Server
2. If i require these config file then are they only used internally or can they be used from outsiders

Here ar my conf file as requested:

named.conf.options:

```
options {
    directory "/etc/bind";
    version "Hello";
    recursion no;
    allow-transfer{none;};
    managed-keys-directory "/etc/bind";
    // If there is a firewall between you and nameservers you want
    // to talk to, you may need to fix the firewall to allow multiple
    // ports to talk.  See http://www.kb.cert.org/vuls/id/800113

    // If your ISP provided one or more IP addresses for stable
    // nameservers, you probably want to use them as forwarders.
    // Uncomment the following block, and insert the addresses replacing
    // the all-0's placeholder.

    // forwarders {
    //      0.0.0.0;
    // };

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

```

named.conf.default-zones

```
// prime the server with knowledge of the root servers
zone "example.com" {
    type master;
    file "/etc/bind/master/master.example.com";
};

zone "X.X.X.in-addr.arpa" {
    type master;
    file "/etc/bind/master/master.X.X.X.X";
};

// be authoritative for the localhost forward and reverse zones, and for
// broadcast zones as per RFC 1912

zone "localhost" {
    type master;
    file "/etc/bind/db.local";
};

zone "127.in-addr.arpa" {
    type master;
    file "/etc/bind/db.127";
};

zone "0.in-addr.arpa" {
    type master;
    file "/etc/bind/db.0";
};

zone "255.in-addr.arpa" {
    type master;
    file "/etc/bind/db.255";
};

```

My named.conf.local is blank so i have not added it
and the zone files are normal and working