Servidores DNS Principal (mname) y Secundario (rname)
host: pcf-gennevilliers.org
class: IN
ttl: 28800
type: SOA
mname: ns1.rrpproxy.net
rname: tech.rrpproxy.net
serial: 3600
refresh: 10800
retry: 3600
expire: 604800
minimum-ttl: 28800