VPN vs ZTNA: One Key Shouldn’t Open Every Door

Person holding a white RFID access card near an elevator keycard reader to unlock floor access inside a commercial office building.

One Key Shouldn’t Open Every Door

A Virtual Private Network gives everyone who logs in the same master key. Anyone can enter anywhere on your network. A Zero Trust Network Access gives each person a role-based keycard instead, giving access to doors only where you need it.

Picture a bookkeeper logging into your network from her kitchen table on a Sunday night. Her login doesn’t ask what she’s there for, only who she is. Once she’s in, she has the same run of the network as if she were sitting at her desk in the office.

YOUR LOGIN

One login. Every door lights up.

That’s a VPN: one key, and it opens every door in the building, no matter who’s holding it or where they’re standing.

ZTNA works differently. Everyone still gets in, but their card only opens what their job actually touches. The receptionist’s login reaches the scheduling system. It stops there. Sales will only reach their parts of the network, never able to reach operations.

ZTNA helps secure paths to your network.

Picture that receptionist’s laptop getting compromised on coffee shop wifi. A VPN just hands over the master key to the whole building while ZTNA gives up one door.

We think most offices are still handing out master keys, and calling it convenient until one ends up in the wrong hands.

The numbers below don’t lie.

88%of small business breaches involved ransomware
39%at larger companies, same year

Source: Verizon 2025 Data Breach Investigations Report

Numbers like that don’t happen because small offices are careless, they happen because doors get left wide open. Old accounts are still active. People have more access than they need and nobody’s gone back to check the locks.

Moving to ZTNA can be done gradually. Most organizations start with a small group of users or applications, test the setup, and then expand the rollout in stages. That gives the IT team time to work through any issues before moving everyone over.

You also don’t have to replace everything at once. A phased rollout lets you keep the existing VPN in place while you move users and applications to ZTNA, then retire the VPN as coverage expands.

Next Step

Curious which doors your team’s keys actually open?

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