Servidores DNS Principal (mname) y Secundario (rname)
host: healer-db.jp
class: IN
ttl: 3600
type: SOA
mname: healer-db.jp
rname: postmaster.healer-db.jp
serial: 1302418633
refresh: 3600
retry: 1800
expire: 604800
minimum-ttl: 3600