Reverse DNS

Reverse DNS using wildcard, example:

IP classe 10.20.30.0/24 and owner domain meudominio.com.br

Include zone

$ORIGIN 30.20.10.in-addr.arpa.$TTL 86400
@       IN      SOA    meudominio.com.br. hostmaster.meudominio.com.br. (
                                20151111 ; Serial
                                10800    ; Refresh
                                3600     ; Retry
                                604800   ; Expire
                                86400 )  ; Minimum
 
 
@       IN      NS      ns1.meudominio.com.br.
@       IN      NS      ns2.meudominio.com.br.
 
 
$GENERATE 0-255  $     PTR     10-20-30-$.asn.meudominio.com.br.