$TTL 2w1d @ IN SOA localhost. root.localhost. ( 1 ; serial 2H ; refresh 30M ; retry 2w1d ; expiry 1H ) ; minimum @ IN NS localhost. 1.0.0 IN PTR localhost.
$TTL 2w1d @ IN SOA localhost. root.localhost. ( 1 ; serial 2H ; refresh 30M ; retry 2w1d ; expiry 1H ) ; minimum @ IN NS localhost. 1.0.0 IN PTR localhost.