[1] The following diagram explains the ideal environment for running the Digi-CA™ Server Xs single server system. The Strong Room/locked server cabinet should be a secured with biometric access, ideally with main power supply and a backup power supply with at least one reliable internet connection. Access to this area should be restricted to Administrators only. Two trusted and approved Administrators should be present at all times when the area is being accessed.
Links:
[1] https://www.digi-sign.com/downloads/download.php?id=digi-ca-pdf