Designing Zero-Trust Remote Access for Thousands of Devices
Secure remote access stops being a simple networking feature the moment the device count moves from dozens to thousands. At that scale, the difficult part is no longer exposing a private subnet or terminating a VPN session at the edge. The difficult part is deciding, continuously and with low latency, whether a specific identity on a specific device should reach a specific resource right now, and then preserving that decision across tunnel establishment, session lifetime, and audit trails. NIST’s zero trust guidance formalizes that shift by treating network location as non-authoritative and requiring authentication and authorization of both the subject and the device before a session is established. The BeyondCorp model reached the same conclusion earlier by treating both internal and external networks as untrusted and basing access on device state, user identity, and centralized policy.
The perimeter disappears long before the tunnel forms
The practical consequence is that remote...
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