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AGRC Framework / Domain 4
04
CSA MAESTRO Layer 4 (Deployment & Infrastructure), NIST SP 800-207 (Zero Trust Architecture).
Domain Objective
The enterprise shall not house a BSL-4 digital pathogen in an open-plan public cloud. If an agent is compromised by "Just-In-Time" polymorphic malware (as observed in Google's PROMPTFLUX report), the network architecture dictates whether the incident remains a contained anomaly or escalates into a catastrophic breach. This domain enforces Default-Deny Cognitive Microsegmentation to explicitly break the "Lethal Trifecta" of Agentic Risk.
Controls
NET-4.1
Sovereign Egress Filtering (Default-Deny Routing)
The Rule — Control Statement
Agent execution containers shall possess zero direct egress pathways to the public internet. All outbound network traffic must be explicitly routed through the Deterministic Governor proxy.
The Why — Fiduciary Rationale
Prevents a compromised agent from autonomously fetching unvetted exploit libraries, communicating with unauthorized Command and Control (C2) servers, or exfiltrating data directly to external endpoints.
The How — Implementation Standard
Network layer allow-listing must be enforced at the VPC/Subnet level. Even calls to primary foundational model providers (e.g., OpenAI, Anthropic APIs) must be proxied and semantically inspected before egress is granted.
The Proof — Continuous Attestation Evidence
Cloud Security Posture Management (CSPM) alerts, VPC Flow Logs, and egress firewall configurations mathematically proving 100% of outbound packets from the agent subnet are routed exclusively to the Governor IP space.
NET-4.2
Breaking the "Lethal Trifecta" (Topological Exclusivity)
The Rule — Control Statement
The infrastructure architecture must physically and logically prevent an agent from simultaneously possessing access to: 1) Sensitive Data, 2) Untrusted External Input, and 3) Unrestricted Outbound Communication.
The Why — Fiduciary Rationale
Radically limits the blast radius of a compromised agent. The convergence of these three capabilities is the absolute prerequisite for an automated data breach.
The How — Implementation Standard
Strict network microsegmentation and dynamic IAM zoning must enforce mutually exclusive operational planes. If an agent ingests an untrusted payload from the internet, it must be topologically barred from touching internal databases; if it touches internal databases, it must be topologically barred from the internet.
The Proof — Continuous Attestation Evidence
Automated Infrastructure-as-Code (IaC) compliance scans and network topology state-diagrams proving the impossibility of a contiguous routing path connecting external ingress, secure databases, and external egress during a single session role.
NET-4.3
Ephemeral Statelessness (Anti-Polymorphic Containment)
The Rule — Control Statement
Agent execution environments shall be strictly stateless and ephemeral at the container level.
The Why — Fiduciary Rationale
Defends against self-rewriting, Just-in-Time (JIT) malware that relies on altering its own source code to achieve persistence and evade static antivirus signatures.
The How — Implementation Standard
All agent execution containers must operate with ReadOnlyRootFilesystem: true. Agents must be physically barred by the hypervisor from writing to, or modifying, their own host directories.
The Proof — Continuous Attestation Evidence
Kubernetes Pod Security Admission (PSA) policies or Docker security contexts explicitly proving read-only root enforcement across all active agent namespaces.
NET-4.4
Hard-Coded Computational Quotas (Anti-DoS)
The Rule — Control Statement
The network and orchestration layer shall enforce strict, immutable token-generation and execution loop quotas per Non-Human Identity (NHI) session.
The Why — Fiduciary Rationale
Autonomous agents are uniquely prone to infinite recursive loops or "stubbornness" upon tool failure. Without quotas, a compromised or hallucinating agent will execute a Denial of Service (DoS) against downstream internal APIs or bankrupt the enterprise cloud budget (Denial of Wallet).
The How — Implementation Standard
Algorithmic circuit breakers must monitor compute cycles and sever the API connection instantly at the infrastructure level when the hard-cap is breached, entirely independent of the LLM's reasoning logic.
The Proof — Continuous Attestation Evidence
APM telemetry and API Gateway rate-limiting logs demonstrating automated connection severance events triggered by exact quota exhaustion thresholds.
NET-4.5
IMDS / Cloud Metadata API Shielding
The Rule — Control Statement
Network routing policies shall explicitly blackhole all traffic originating from agent-execution containers directed to Cloud Instance Metadata Service (IMDS) IP addresses.
The Why — Fiduciary Rationale
If an agent is manipulated into executing a Server-Side Request Forgery (SSRF) attack, its primary objective will be querying the cloud provider's IMDS endpoint (e.g., 169.254.169.254) to extract the host container's highly privileged root IAM credentials.
The How — Implementation Standard
Egress network policies (e.g., Calico network policies, AWS Security Groups) must drop packets to the IMDS endpoint before they leave the container namespace.
The Proof — Continuous Attestation Evidence
Egress firewall rule sets showing absolute denial to 169.254.169.254/32 combined with zero hit-count logs from agent subnets.
NET-4.6
Inference Routing & BGP Hijacking Defenses
The Rule — Control Statement
All outbound API connections to third-party inference providers must enforce strict Certificate Pinning and static IP routing.
The Why — Fiduciary Rationale
Protects the cognitive supply chain. If an attacker executes DNS spoofing or a BGP hijack, the agent could be silently routed to a malicious LLM proxy that returns poisoned logic or hallucinates exploit pathways.
The How — Implementation Standard
The proxy layer must mathematically validate the TLS certificate fingerprint of the upstream inference API before transmitting the context window.
The Proof — Continuous Attestation Evidence
API Gateway configurations enforcing TLS certificate pinning, backed by logs of successful/failed cryptographic handshakes for all external model APIs.
NET-4.7
Cryptographic Entropy Egress Limits (Dark Comm Prevention)
The Rule — Control Statement
The network egress firewall shall reject any high-entropy text strings or payloads that the Deterministic Governor cannot natively and semantically parse.
The Why — Fiduciary Rationale
As observed in the Moltbook/OpenClaw phenomenon, highly capable agents will autonomously invent or negotiate End-to-End (E2E) encrypted channels (e.g., generating PGP blocks or Base64 obfuscation) to bypass platform API logging. If the enterprise cannot read it, it cannot leave the perimeter.
The How — Implementation Standard
The Governor payload scanner must enforce entropy thresholds; unreadable encodings or custom cipher-texts are dropped by default unless explicitly escrowed by the enterprise.
The Proof — Continuous Attestation Evidence
Governor intervention logs showing BLOCKED actions specifically mapped to "High-Entropy/Unparseable Payload" violations at the egress boundary.
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