;
; dns zone for for mydns.stdi.com
;
$ORIGIN mydns.stdi.com.
$TTL 3h
; any time you make a change to the domain, bump the
; "serial" setting below. the format is easy:
; YYYYMMDDI, with the I being an iterator in case you
; make more than one change during any one day
;
mydns.stdi.com.         IN  SOA   thinkpad postmaster (
                        200601042 ; serial
                        3H        ; refresh
                        1H        ; retry
                        1W        ; expire
                        1H )      ; minimum
;
; name server (NS) 
;
mydns.stdi.com.         IN NS      thinkpad.mydns.stdi.com.
;
; hostnames, in alphabetical order
;
thinkpad                IN A     192.168.1.200
;
; WHITELIST ENTRIES
;
4.156.176.207           IN A     127.0.0.1
6.156.176.207           IN A     127.0.0.1

mydns     NS   mydns.stdi.com
mydns     A    192.168.1.200

Loopback configuration
The next two files can be used as-is and define the local host or loopback address.
Domain: localhost
File name: localhost.dns

; ; loopback/localhost zone file ; $TTL 1D $ORIGIN localhost. @ IN SOA @ root ( 1 ; Serial 8H ; Refresh 15M ; Retry 1W ; Expire 1D) ; Minimum TTL IN NS @ IN A 127.0.0.1

Domain: 0.0.127.in-addr.arpa
File name: 127.0.0.dns

; ; reverse pointers for localhost ; $TTL 1D $ORIGIN 0.0.127.in-addr.arpa. @ IN SOA localhost. root.localhost. ( 1 ; serial 8H ; refresh 15M ; retry 1W ; expire 1D ) ; minimum IN NS localhost. 1 IN PTR localhost.

A very short zonefile introduction
When adding entries in a zone file, many of the positional paramters are optional. The full Address entry with all parameters looks like this:
hostname ttl IN A 192.168.1.200

hostname [optional]	Usually the hostname. If the name doesn't end with a dot, the default domain is appended. The default domain comes from previous definitions. In our examples, we use the $ORIGIN to set the domain.
ttl [optional]	Time to live
IN [optional]	Class, IN stands for Internet
A	Address
192.168.1.200	IP address

When adding a Whitelist entry, we have two basic options. Both of the following Address records are identical.

$ORIGIN mydns.stdi.com.
200.1.168.192  A  127.0.0.1
200.1.168.192.mydns.stdi.com.  A  127.0.0.1

When you add the complete host name, terminte the name with a dot. If the dot is missing, the default domain is appended.

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