Servidores DNS Principal (mname) y Secundario (rname)
host: centralindia.cloudapp.azure.com
class: IN
ttl: 3600
type: SOA
mname: ns1-01.azure-dns.com
rname: msnhst.microsoft.com
serial: 10001
refresh: 900
retry: 300
expire: 604800
minimum-ttl: 60