Registro IPv4
host: proxy.polytechnique.org
class: IN
ttl: 3600
type: A
ip: 129.104.30.37

host: x-entrepreneur.polytechnique.org
class: IN
ttl: 3600
type: CNAME
target: proxy.polytechnique.org

Servidor de Correo
host: proxy.polytechnique.org
class: IN
ttl: 3600
type: MX
pri: 0
target: mx1.polytechnique.org

Servidor de Correo
host: proxy.polytechnique.org
class: IN
ttl: 3600
type: MX
pri: 5
target: mx2.polytechnique.org

Servidor de Correo
host: proxy.polytechnique.org
class: IN
ttl: 3600
type: MX
pri: 10
target: mx3.polytechnique.org