How should security teams evaluate VPN alternatives for remote access to internal services?

Why This Matters for Security Teams

VPN alternatives are not just a network design choice. They change where trust is established, how access is evaluated, and whether internal services remain reachable without turning every remote session into a broad network foothold. If the replacement only authenticates once at login, it may look modern while preserving the same perimeter gap that zero trust is meant to remove. That matters most for teams protecting admin panels, internal APIs, and service endpoints that should never be broadly exposed.

Security teams should also treat this as an identity problem, not a tunnel problem. Remote access products often end up protecting service accounts, API tokens, and automation paths as much as human users, which is why the risk profile overlaps with non-human identity governance. NHIMG research shows that 80% of identity breaches involved compromised non-human identities such as service accounts and API keys, and 97% of NHIs carry excessive privileges. Those findings are especially relevant when an access layer becomes the new control plane for internal services, as highlighted in Ultimate Guide to NHIs and the SonicWall VPN Mass Breach via Stolen Credentials case study. In practice, many teams discover overbroad access only after a remote access product has already become the shortest path to internal systems.

How It Works in Practice

When evaluating alternatives, compare them against the controls that actually reduce lateral movement and session abuse. A strong design usually combines clientless access or narrow connectors, granular application-level policy, continuous re-checks of identity and device posture, and short-lived credentials tied to the session or task. That is more aligned with Zero Trust than a broad network tunnel, because access is decided per request rather than granted once and left open. NIST SP 800-53 Rev. 5 is useful here because it frames access control, auditability, and session monitoring as enforceable controls rather than product features, while the OWASP Non-Human Identity Top 10 helps teams think about credential exposure, over-privilege, and lifecycle issues that often appear alongside remote access.

In practice, teams should test four things:

• Whether the tool can publish only the specific internal service, not the whole subnet.
• Whether policy can vary by user, device, posture, time, and destination service.
• Whether authentication is re-evaluated during the session, not only at connection start.
• Whether service access can be separated from human access so automation does not inherit user-level reach.

That last point matters because internal services are often reached by scripts, agents, and admin tooling that rely on secrets and tokens rather than interactive logins. If the access layer cannot distinguish those identities cleanly, the organisation may replace one broad tunnel with another broad trust boundary. These controls tend to break down when legacy applications require flat network reachability and cannot enforce per-request policy because the access layer is forced back into perimeter mode.

Common Variations and Edge Cases

Tighter access controls often increase rollout complexity, so organisations need to balance user experience against policy depth and operational overhead. There is no universal standard for how much device trust, posture checking, or session revalidation is enough, especially when the estate includes old apps, third-party hosted services, or admin tools that were built for VPN-era assumptions.

Some VPN alternatives are good for human users but weak for service-to-service access. Others handle application publishing well but struggle with data tenancy, internal DNS dependencies, or privileged workflows that depend on legacy protocols. Best practice is evolving, but current guidance suggests separating remote human access from machine access, then evaluating each path on least privilege and revocation speed. For teams managing secrets-heavy environments, the difference between a better remote access tool and a real security improvement often comes down to whether the product can also reduce standing access and credential persistence, not just hide the network.

In higher-risk environments, it is worth pairing any access replacement with explicit monitoring of credential lifecycle and privileged use. NHIMG’s Ultimate Guide to NHIs — Key Challenges and Risks is a useful reference point when the question shifts from connectivity to control. The practical limit appears when remote access must support unmanaged devices or disconnected users, because those conditions often force weaker policy checks and longer-lived exceptions.

Related resources from NHI Mgmt Group

• How should security teams replace VPN access for internal services without widening privilege?
• How should security teams decide whether JIT access is safe for non-human identities?
• How should security teams evaluate remote access software beyond price?
• How should security teams evaluate Twingate alternatives for privileged access?