Servidores DNS Principal (mname) y Secundario (rname)
host: Yurth.net
class: IN
ttl: 3600
type: SOA
mname: dns01.muumuu-domain.com
rname: postmaster.Yurth.net
serial: 1771907007
refresh: 3600
retry: 1800
expire: 604800
minimum-ttl: 3600