FirewallFirewall is a system designed to prevent unauthorized access to or from the network. Firewalls can be implemented in both hardware and software, or a combination of both. All packets entering or leaving the protected computers pass through the firewall, which examines each packet and blocks those that do not meet the specified security criteria.
 Si quieres hacer una imagen de toda tu computadora, yo recomiendo Acronis True Image, que hará la imagen entera de tu disco a otro externo en solo 15 minutos.
Es simple, fácil y vale lo pagado.
James Derk,
Scripps Howard News Syndicate
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Software de copia de seguridad de Acronis Inc.