Topic starter
09/06/2026 11:58 pm
TL;DR: Traditional perimeter security fails because cloud, mobile, remote work, and VPN tunnels dissolve the inside-outside boundary, leaving attackers and insiders able to move laterally once inside, according to Pomerium and NIST SP 800-207. Zero trust shifts control to the resource and the requesting identity, which changes how IAM, NHI, and access governance must be designed.
Editorial analysis by NHI Mgmt Group, based on content published by Pomerium: “The Perimeter Problem: Why Traditional Network Security Fails”.
Key questions
Q: What breaks when cloud security is still built around a fixed network perimeter?
A: A fixed perimeter breaks down when workloads, data, and applications move across hybrid and multi-cloud environments.
Q: Why do VPNs often increase internal risk instead of removing it?
A: VPNs create a secure tunnel into the enterprise, but the tunnel itself becomes a trusted entry point.
Q: How do organisations know whether perimeter controls are actually working?
A: Look for three signals: timely patching on exposed appliances, consistent log forwarding into a central monitoring stack, and evidence that unsupported devices are isolated or retired.
Practitioner guidance
- Shift authorization to the resource Require applications and services to enforce their own access decisions using identity and request context, rather than inheriting trust from network location.
- Reduce tunnel-wide trust Constrain VPN and remote-access paths so a connected subject cannot automatically reach broader internal systems than the session actually requires.
- Map internal trust assumptions Inventory where your programme still assumes that anything inside the network is safe, then identify the applications, service accounts, and workflows that depend on that assumption.
Bottom line: Traditional perimeter security fails when the network boundary no longer matches how users and services actually connect.
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This topic was modified 1 day ago by NHI Mgmt Group
10/06/2026 2:33 am
The perimeter model fails because it was designed for a world in which trust could be inferred from location. That premise breaks once users, workloads, and services are distributed across cloud, remote, and third-party environments. The control failure is not just technical, it is conceptual: security teams are still making decisions as if network proximity implied legitimacy. Practitioners need to treat the perimeter as an access path, not a trust boundary.
A few things that frame the scale:
- Only 5.7% of organisations have full visibility into their service accounts, according to the Ultimate Guide to NHIs.
- 71% of NHIs are not rotated within recommended time frames, increasing the risk of compromise over time.
A question worth separating out:
Q: What is the difference between zero trust and perimeter security for access control?
A: Perimeter security authorises by boundary, while zero trust authorises by identity and context at the resource itself. In a perimeter model, the network gate is the main decision point. In a zero trust model, each application or service makes the decision, which sharply reduces the value of being “inside” the network.
👉 Read our full editorial: The perimeter problem: why network security fails under zero trust
11/06/2026 1:33 am
The perimeter model fails because it was designed for a world in which trust could be inferred from location. That premise breaks once users, workloads, and services are distributed across cloud, remote, and third-party environments. The control failure is not just technical, it is conceptual: security teams are still making decisions as if network proximity implied legitimacy. Practitioners need to treat the perimeter as an access path, not a trust boundary.
A few things that frame the scale:
- Only 5.7% of organisations have full visibility into their service accounts, according to the Ultimate Guide to NHIs.
- 71% of NHIs are not rotated within recommended time frames, increasing the risk of compromise over time.
A question worth separating out:
Q: What is the difference between zero trust and perimeter security for access control?
A: Perimeter security authorises by boundary, while zero trust authorises by identity and context at the resource itself. In a perimeter model, the network gate is the main decision point. In a zero trust model, each application or service makes the decision, which sharply reduces the value of being “inside” the network.
👉 Read our full editorial: The perimeter problem: why network security fails under zero trust
12/06/2026 3:07 am
The perimeter problem is really a trust-placement problem: network boundary controls assume that trust can be assigned once, at entry, and then reused inside the environment. That assumption breaks when cloud services, remote work, and mobile access make the boundary fluid. The practical conclusion is that access governance must stop treating network location as a proxy for trust.
A question worth separating out:
Q: What is the difference between perimeter security and zero trust in open banking environments?
A: Perimeter security assumes trust inside a defended boundary and focuses on blocking or inspecting traffic at the edge. Zero trust assumes no implicit trust anywhere, so each request must be authenticated, authorised, and evaluated in context. In open banking, that distinction matters because access extends beyond the corporate network to external parties and shared data flows.
👉 Read our full editorial: The perimeter problem: why network security fails under zero trust
This post was modified 1 day ago by NHI Mgmt Group