127.0.0.1 localhost
127.0.0.1 www.twitter.com
127.0.0.1 www.facebook.com
127.0.0.1 www.youtube.com
127.0.0.1 twitter.com
127.0.0.1 https://twitter.com
127.0.0.1 https://facebook.com
DNS’s para OpenDNS
128.67.222.222 y 128.67.220.220 ::
OpenDNS Family shield: (free DNS, no
208.67.222.123 y 208.67.220.123 :: DNS preconfigurado para bloquear contenido para adulto
OpenDNS Home (free account)