Virtually every company today uses firewalls to enforce perimeter security.
However, this security model is problematic because, when that perimeter is
breached, an attacker has relatively easy access to a company’s privileged
intranet. As companies adopt mobile and cloud technologies, the perimeter is
becoming increasingly difficult to enforce. Google is taking a different approach
to network security. We are removing the requirement for a privileged intranet and
moving our corporate applications to the Internet.