Network-based, agentless architecture detects and enforces security controls from the network layer instead of relying on software installed on each host. This reduces deployment friction and can speed response across cloud, on-premises, and hybrid systems. It also shifts emphasis toward traffic visibility, segmentation, and policy enforcement.
Expanded Definition
Network-based, agentless architecture is a control pattern that observes and enforces policy from the network path rather than from software agents installed on each workload. In NHI security, this means detection, segmentation, and response can operate without modifying every server, container, or endpoint, which is especially useful in hybrid estates and ephemeral environments.
Definitions vary across vendors on how much visibility is “agentless” versus “agent-assisted,” so practitioners should treat the label as an implementation style, not a guarantee of complete coverage. In practice, the model is strongest when paired with identity-aware controls, because traffic alone does not prove which service account, API key, or agent is authorized to act. That is why network telemetry should be correlated with identity context and policy decisions described in the NIST SP 800-207 Zero Trust Architecture and the OWASP Agentic AI Top 10.
The most common misapplication is treating network observation as a substitute for workload identity governance, which occurs when teams assume traffic control alone can prevent misuse of secrets or service accounts.
Examples and Use Cases
Implementing network-based, agentless architecture rigorously often introduces a visibility tradeoff, requiring organisations to weigh fast deployment and broad coverage against deeper host-level context and remediation detail.
- Monitoring east-west traffic between microservices to detect anomalous calls from an AI agent that suddenly reaches a sensitive database.
- Enforcing segmentation for legacy systems that cannot support installed agents, while still applying identity-aware policy at the network edge.
- Watching for unusual API bursts that indicate stolen secrets, then correlating them with guidance from the Ultimate Guide to NHIs — 2025 Outlook and Predictions.
- Using packet and flow inspection to block tool calls from an autonomous agent when behavior matches patterns discussed in the OWASP NHI Top 10.
- Segmenting third-party connections so vendors can reach only the services they need, aligned to zero trust guidance in the NIST AI Risk Management Framework.
These use cases are most effective when the network layer is used to enforce policy boundaries, not to infer trust from location or IP address alone.
Why It Matters in NHI Security
Network-based, agentless architecture matters because NHIs often outnumber humans by 25x to 50x, and many of them are difficult to inventory or instrument consistently. When secrets are embedded in code, stored in CI/CD tools, or attached to third-party workflows, installing agents everywhere may be unrealistic or too slow for the threat timeline. A network-first model can reduce deployment friction, but it only works if security teams can still see which identities are communicating, what they are allowed to access, and whether the access matches policy.
This becomes especially important in breach response. NHIMG research shows that 79% of organisations have experienced secrets leaks, with 77% of those incidents causing tangible damage, and 91.6% of secrets remain valid five days after notification. Those realities make rapid network containment valuable, particularly when paired with the Moltbook AI agent keys breach and the CSA MAESTRO agentic AI threat modeling framework.
Organisations typically encounter the full operational value of this model only after a secrets leak or agent compromise forces them to contain traffic immediately, at which point network-based enforcement becomes operationally unavoidable to address.
Standards & Framework Alignment
This section maps relevant standards and security frameworks to the operational risks and controls described in this guidance.
OWASP Non-Human Identity Top 10, OWASP Agentic AI Top 10 and CSA MAESTRO address the attack and risk surface, while NIST Zero Trust (SP 800-207) and NIST AI RMF set the governance and control requirements practitioners need to meet.
| Framework | Control / Reference | Relevance |
|---|---|---|
| OWASP Non-Human Identity Top 10 | NHI-02 | Agent and secret abuse are core NHI control concerns for network-contained workloads. |
| OWASP Agentic AI Top 10 | Agentic systems need constrained tool and network access to reduce abuse paths. | |
| NIST Zero Trust (SP 800-207) | 4.2 | Zero Trust emphasizes continuous verification over implicit network trust. |
| NIST AI RMF | GV.4 | AI governance requires monitoring and risk controls across system boundaries. |
| CSA MAESTRO | TRM-02 | MAESTRO models threats in agentic workflows where network paths carry tool access. |
Use network policy to limit NHI blast radius, then verify secrets and service accounts separately.
Related resources from NHI Mgmt Group
- Why are identity-based attacks growing faster than traditional network attacks?
- What is the difference between network detection and identity-based discovery for AI agents?
- How should security teams combine agentless and agent-based Kubernetes scanning?
- What is the difference between OT network segmentation and identity-based access control?
