In healthcare, access is not just an IT function. It is part of the care delivery system. Clinicians, specialists, imaging teams, and third-party providers depend on consistent, real-time access to electronic health record (EHR) systems, diagnostic platforms, and clinical applications. When that access is delayed, degraded, or overly broad, the impact is immediate—on operations, compliance, and patient care.
At the same time, healthcare environments are becoming more distributed and more interconnected. Cloud-hosted EHR platforms, remote clinical workflows, vendor access, and IoMT devices have expanded both the attack surface and the complexity of enforcing secure access.
This creates a structural problem. Traditional approaches to segmentation and remote access were not designed for environments where performance, precision, and continuous availability are all required at once—and where delays can directly impact clinical outcomes.
Where Legacy Architectures Break Down
Healthcare organizations are trying to support modern clinical access requirements with architectures that were not designed for today’s distributed, performance-sensitive environments. In practice, the breakdown usually appears in three places: firewall segmentation becomes difficult to manage at scale, VPNs introduce both performance and over-permissioning risks, and cloud-routed ZTNA can create latency and control concerns that do not align with clinical operations.
Firewall Segmentation Becomes Operationally Unsustainable
Healthcare organizations have long relied on network segmentation to isolate clinical systems. In practice, this often means managing large volumes of firewall rules across EHR environments, imaging networks, and supporting infrastructure.
Over time, that model becomes difficult to maintain.
As environments expand, segmentation policies grow more complex, more static, and harder to validate. Rule sets accumulate across hospitals, clinics, and cloud environments, increasing the likelihood of misconfiguration, unintended access paths, and audit gaps.
More importantly, network-based segmentation does not map cleanly to how healthcare operates. Clinicians, vendors, and systems require access based on role and context, not IP ranges or VLAN boundaries. Trying to enforce that through firewalls alone introduces friction, slows critical access changes, and increases operational and audit burden. The result is a system that is both rigid and incomplete—difficult to manage operationally, and insufficiently precise from a security perspective.
VPN Architectures Introduce Performance and Exposure Risks
VPNs were designed for a simpler access model, where a limited number of users connected into a defined network perimeter. That model does not hold up in modern clinical environments.
Once authenticated, VPN users are often placed onto a broad segment of the network. Even with additional controls layered on top, this creates excessive trust and increases the risk of lateral movement if credentials are compromised.
At the same time, VPN performance becomes a limiting factor for clinical workflows.
Imaging platforms, in particular, are highly sensitive to latency and throughput constraints. Routing large imaging datasets through centralized VPN infrastructure can introduce delays, degrade user experience, and create bottlenecks that affect diagnostic workflows and clinician productivity.
In healthcare, those performance issues are not just inconvenient. They can delay diagnosis, slow clinical decision-making, and impact patient care delivery.
Cloud-Routed ZTNA Can Introduce New Dependencies
Zero Trust Network Access is intended to address the limitations of VPN-based models, but not all architectures are equally suited for healthcare. Many ZTNA solutions rely on cloud-brokered routing, where traffic is sent through external points of presence before reaching the intended resource. That design introduces tradeoffs.
Routing clinical traffic through third-party infrastructure can add latency to performance-sensitive applications such as imaging systems and real-time monitoring platforms. It also introduces external dependencies that healthcare IT teams do not control, complicating resilience planning, data residency requirements, and incident response. In environments where seconds matter, adding external chokepoints to the access path is not just a design tradeoff—it is a risk to availability and continuity of care.
What Resilient Access Requires in Clinical Environments
Designing access for healthcare requires a different set of priorities. Security controls must be precise enough to enforce least privilege, flexible enough to adapt to changing roles and environments, and performant enough to support real-time clinical workflows.
At a practical level, that means:
- Access decisions must be identity-driven, not network-based
- Connectivity must be limited to specific systems, not entire network segments
- Policies must adapt dynamically based on user, device, and context
- Performance must be preserved for EHR systems, imaging platforms, and telehealth services
- Visibility must be continuous and audit-ready, supporting “who accessed what, when, and under what conditions”
This is not just a Zero Trust principle. It is a clinical and regulatory requirement.
A More Practical Approach: Direct, Identity-Centric Access
A resilient access architecture aligns security controls to how healthcare actually operates. Instead of extending network access and attempting to constrain it afterward, access is granted directly to the specific systems a user or device is authorized to reach.
This approach changes the model in several important ways:
- Users and devices connect only to authorized clinical resources, not to the network as a whole
- Access is enforced based on real-time identity, device posture, and contextual risk
- Connectivity is direct, avoiding unnecessary routing through external infrastructure
- Clinical systems are not exposed to unauthorized discovery, reducing attack surface
From an architectural standpoint, this reduces reliance on complex, slow-to-change firewall rule sets, eliminates broad VPN-based access, and avoids the performance and control tradeoffs introduced by cloud-routed intermediaries.
Applying This Model with AppGate ZTNA
AppGate ZTNA is designed to support this model in healthcare environments where performance, precision, and resilience are equally critical.
Direct-Routed Access for Performance-Sensitive Systems — AppGate enables users and devices to connect directly to authorized resources, without routing traffic through external cloud brokers. This preserves performance for EHR access, imaging workflows, and other latency-sensitive clinical applications.
Dynamic, Risk-Based Least Privilege — Access is granted based on identity, device posture, location, and contextual risk. Permissions are continuously evaluated and adjusted in real time, ensuring that access remains tightly scoped as conditions change.
Reduced Dependence on Network Segmentation — By enforcing access at the identity and application layer, AppGate reduces the need to manage increasingly complex and brittle firewall segmentation policies across distributed environments.
Resource Cloaking to Limit Exposure — Protected systems are not visible to unauthorized users. This prevents reconnaissance and reduces the likelihood of lateral movement across clinical environments.
Continuous Visibility and Auditability — All access decisions are policy-driven, logged, and auditable, supporting HIPAA, HITECH, and broader regulatory requirements while reducing audit burden and improving incident response readiness.
Strengthening Resilience Without Compromising Care
Healthcare organizations do not have the luxury of choosing between security and performance. Access controls must protect sensitive patient data, limit exposure, and support compliance, without introducing latency, operational friction, or new points of failure. That requires moving beyond architectures built on network trust, static segmentation, and centralized bottlenecks.
By aligning access to identity, context, and direct connectivity, healthcare organizations can reduce complexity, improve performance, and build a more resilient foundation for clinical operations—one that supports both security objectives and uninterrupted patient care.
Learn how AppGate ZTNA delivers direct, identity-centric access to clinical systems, preserving performance while reducing complexity and exposure. Explore healthcare access solutions from AppGate.