For years, securing remote workers meant one thing: a VPN. An employee connected through an encrypted tunnel, landed "inside" the corporate network, and was trusted from there. That model made sense when nearly everything lived in an office server room and remote access was the exception. It makes far less sense now, and the shift toward zero-trust access is a direct response to how thoroughly the old perimeter has dissolved.
Why the perimeter is gone
The traditional security model treated the network like a building: a hard wall around the outside, and trust for anyone who got in the door. The VPN was that door. The trouble is that the "building" no longer has clear walls. Your email lives in Microsoft 365 or Google Workspace, your files in a cloud drive, your business apps in someone else's data center, and your staff log in from home networks, phones, and coffee shops. When the things you are protecting are scattered across the internet and your people are too, the idea of a single trusted interior stops matching reality. A VPN still drops a remote user "inside," but inside no longer means much.
What zero trust changes
Zero trust flips the default. Instead of trusting a device because it reached the network, it verifies every request: who the user is, whether they have passed multi-factor authentication, whether their device is known and healthy, and whether they are allowed to reach that specific application, every time. The practical effect is that access is granted to one app, not to the whole network. If an attacker steals one set of credentials, they reach the one resource that account can touch, not a flat internal network where they can roam. For a small business, that containment is the headline benefit.
A few honest distinctions are worth keeping straight:
A VPN authenticates once and grants broad network access; zero trust authenticates continuously and grants narrow, per-app access.
Zero trust is a strategy, not a single product you buy and switch on.
Most small businesses move gradually, often starting with strong identity and MFA on cloud apps.
What this means for a smaller company
None of this requires ripping out everything overnight. The realistic path for most small firms starts with the highest-value, lowest-effort piece: strong identity controls and multi-factor authentication on the cloud services you already use, then tightening access app by app. As more of the business runs on hosted platforms, the question of remote access blends into broader decisions about where systems live and how they are managed, which is why it often comes up alongside a move to managed cloud infrastructure with security and access built in rather than bolted on afterward.
A VPN says "you reached the network, so you're trusted." Zero trust says "prove who you are, on a healthy device, for this one app, every time."
The VPN is not dead for every use, but as the default way to secure a distributed team, it is showing its age. Verifying each request and granting the narrowest access that gets the job done is simply a better fit for a workforce and a set of applications that no longer sit behind any single wall.
