How should security teams replace VPN access without creating new operational gaps?

Why This Matters for Security Teams

Replacing VPN access is not just a transport change. It is a shift from network-level reachability to identity-bound, resource-scoped access, where every session must prove who or what is connecting, what it is allowed to touch, and for how long. That matters because VPNs often create broad implicit trust, while modern environments need tighter control over secrets, service access, and auditability.

The risk is not theoretical. NHIMG’s research shows that 97% of NHIs carry excessive privileges and that 71% are not rotated within recommended time frames, which makes long-lived access paths especially dangerous in hybrid environments. Guidance from the OWASP Non-Human Identity Top 10 and NIST control models points in the same direction: reduce standing access, scope credentials narrowly, and verify every request. The security challenge is to remove VPN dependency without creating a new shared backdoor for admins, contractors, or automation.

In practice, many security teams discover the real VPN problem only after a credential leak, lateral movement event, or emergency access request has already exposed how much production access was being hidden behind one tunnel.

How It Works in Practice

The cleanest replacement pattern is to classify access by resource type and session intent, then issue access only at the moment it is needed. That usually means moving from “connect to the network” to “open a controlled session to this application, host, or API.” The session should be tied to a strong identity signal, short-lived, and automatically revoked when the task ends. This is consistent with Ultimate Guide to NHIs, which emphasizes lifecycle control, visibility, and rotation as foundational NHI practices.

In operational terms, security teams typically combine identity-aware access proxies, JIT authorization, and centralized logging. A practical rollout often looks like this:

• Inventory the actual destination resources instead of granting blanket network reach.
• Map each use case to a resource-scoped policy, such as admin console access, database maintenance, or CI/CD job execution.
• Issue short-lived tokens or certificates only after policy checks succeed.
• Bind the session to workload identity or user identity, depending on the use case.
• Record the request context, policy decision, and session activity for audit and incident response.

For automation and agentic systems, the same principle applies with even less tolerance for static permissions. The agent should present workload identity proof, not a reusable shared secret, and receive ephemeral credentials only for the task at hand. That aligns with the control logic described in the NIST Cybersecurity Framework and NIST control families on access enforcement and logging. These controls tend to break down in flat legacy networks with shared admin accounts because the environment cannot distinguish legitimate task scope from unrestricted east-west movement.

Common Variations and Edge Cases

Tighter access control often increases operational overhead, requiring organisations to balance reduced exposure against the friction of more frequent approvals, shorter session lifetimes, and stronger logging requirements. That tradeoff is real, especially during migrations where VPNs still support legacy systems, vendor support paths, or break-glass access.

Current guidance suggests treating those exceptions as bounded and observable, not as reasons to preserve broad VPN access. For example, a legacy system may still require network-level reachability, but the policy should isolate it behind a restricted gateway, time limit, and step-up approval. This is also where Zero Trust thinking becomes practical rather than abstract: trust should be re-evaluated continuously, not inherited from a tunnel.

The hardest cases are environments with unmanaged endpoints, shared service credentials, or third-party operators who expect persistent connectivity. In those settings, the transition fails if teams remove VPN before they have built alternatives for session recording, privileged credential issuance, and revocation. NHIMG’s Key Challenges and Risks section and the SonicWall VPN Mass Breach via Stolen Credentials case both reinforce the same lesson: migration succeeds only when identity, policy, and revocation are redesigned together.

Related resources from NHI Mgmt Group

• How should security teams replace traditional MFA without creating new access friction?
• How should security teams implement just-in-time access without creating new governance gaps?
• How should security teams automate database access without creating new privilege creep?
• How should security teams automate identity lifecycle management without creating new access risk?