Entry to the facility requires admins to navigate past the 2.1m-high anti-scale perimeter fence, and enter the bullet-resistant glass facade. Once security office formalities are dealt with, users must rely on two-factor authentication — a card and biometrics — to move through one of three mantraps. The traps also weigh personnel on entry and exit looking for anomalies. In the forefront, NextDC CEO Craig Scroggie. (Photo credit: NextDC)