Hardening real systems in production, for engineers who actually run them. https://www.systemshardening.com/ Systems Hardening 2026-04-29T00:00:00.000Z https://www.systemshardening.com/articles/ai-landscape/ai-agent-observability/ 2026-04-29T00:00:00.000Z 2026-04-29T00:00:00.000Z

AI Agent Observability and Tracing: OpenTelemetry for Agent Runs and Tool Calls Problem A production AI agent’s single run involves: Multiple model calls (planner, executor, summarizer). Tool...

https://www.systemshardening.com/articles/ai-landscape/ai-output-watermarking/ 2026-04-29T00:00:00.000Z 2026-04-29T00:00:00.000Z

AI Model Output Watermarking: Provenance for Generated Text and Code Problem C2PA signs media files at creation. It works for images and video — the manifest sits in metadata, the signature is...

https://www.systemshardening.com/articles/ai-landscape/continuous-red-teaming/ 2026-04-29T00:00:00.000Z 2026-04-29T00:00:00.000Z

Continuous AI Red-Teaming Pipelines: Automated Adversarial Testing in CI Problem Most AI security investment goes into one-off red-team engagements: a security firm runs adversarial prompts against...

https://www.systemshardening.com/articles/cicd/jit-ci-access/ 2026-04-29T00:00:00.000Z 2026-04-29T00:00:00.000Z

Just-in-Time CI Access for Production Deploys: Approval Flows and Bounded Permissions Problem CI / CD pipelines that deploy to production typically have standing access: an IAM role, a Vault token, a...

https://www.systemshardening.com/articles/cicd/renovate-dependabot-security/ 2026-04-29T00:00:00.000Z 2026-04-29T00:00:00.000Z

Renovate and Dependabot Security Configuration: Auto-Merge Boundaries and Scope Rules Problem Dependency-update bots — Renovate, Dependabot — solve a real problem. Without them, dependencies stagnate;...

https://www.systemshardening.com/articles/cicd/scm-identity-choice/ 2026-04-29T00:00:00.000Z 2026-04-29T00:00:00.000Z

GitHub Apps vs PATs vs Deploy Keys vs OIDC: Choosing the Right SCM Identity Problem Every team integrating with GitHub (or GitLab, with analogous mechanisms) has at least one credential question per...

https://www.systemshardening.com/articles/cross-cutting/api-key-lifecycle/ 2026-04-29T00:00:00.000Z 2026-04-29T00:00:00.000Z

API Key Lifecycle at Scale: Issuance, Rotation, Scoping, and Audit Across Cloud and SaaS Problem API keys leak. The 2024 GitGuardian “State of Secrets Sprawl” report found 23+ million secrets exposed...

https://www.systemshardening.com/articles/cross-cutting/production-access-management/ 2026-04-29T00:00:00.000Z 2026-04-29T00:00:00.000Z

Production Access Management with Teleport and Boundary: Brokered, Recorded, Auditable Access Problem Operator access to production hosts has long been a structural weakness: Static SSH keys...

https://www.systemshardening.com/articles/cross-cutting/tabletop-exercises/ 2026-04-29T00:00:00.000Z 2026-04-29T00:00:00.000Z

Tabletop Exercises and Chaos Security Drills: Building, Running, and Acting on Findings Problem Real security incidents happen at 3 AM, with incomplete information, in systems people half-remember,...

https://www.systemshardening.com/articles/kubernetes/csi-driver-security/ 2026-04-29T00:00:00.000Z 2026-04-29T00:00:00.000Z

CSI Driver Security: Volume-Mount Hardening, Privileged Drivers, and Inline Ephemeral Volumes Problem The Container Storage Interface (CSI) is the standard mechanism for attaching storage to...

https://www.systemshardening.com/articles/kubernetes/external-secrets-operator/ 2026-04-29T00:00:00.000Z 2026-04-29T00:00:00.000Z

External Secrets Operator: Pulling Secrets from KMS, Vault, and Cloud Stores into Kubernetes Problem Native Kubernetes Secrets are convenient and dangerous. They’re base64 strings sitting in etcd;...

https://www.systemshardening.com/articles/kubernetes/native-sidecar-containers/ 2026-04-29T00:00:00.000Z 2026-04-29T00:00:00.000Z

Native Sidecar Containers in Kubernetes 1.29+: Lifecycle, Security, and Mesh Migration Problem The classic sidecar pattern — a container in the same Pod as the application that handles cross-cutting...

https://www.systemshardening.com/articles/linux/dm-verity/ 2026-04-29T00:00:00.000Z 2026-04-29T00:00:00.000Z

dm-verity and dm-integrity: Tamper-Evident Block-Level Roots for Production Linux Problem Filesystem-level integrity (auditd, AIDE, Tripwire) is too late. A check that runs after boot has already let...

https://www.systemshardening.com/articles/linux/ebpf-lsm/ 2026-04-29T00:00:00.000Z 2026-04-29T00:00:00.000Z

eBPF-LSM (lsm_bpf): Kernel Security Policy as Hot-Loadable BPF Programs Problem Linux Security Modules (LSMs) — AppArmor, SELinux, Smack — define security policy at kernel hooks: every file open,...

https://www.systemshardening.com/articles/linux/usbguard/ 2026-04-29T00:00:00.000Z 2026-04-29T00:00:00.000Z

USBGuard: USB Device Authorization on Production Linux Hosts Problem Most production Linux hosts default-trust every USB device. The kernel sees a new device, asks the bus to enumerate it, then loads...

https://www.systemshardening.com/articles/network/haproxy-hardening/ 2026-04-29T00:00:00.000Z 2026-04-29T00:00:00.000Z

HAProxy Production Hardening: Beyond TLS, Request Filtering, ACLs, and Logging Hygiene Problem HAProxy is the workhorse load balancer for many large internet properties — Stack Overflow, Reddit,...

https://www.systemshardening.com/articles/network/istio-egress-gateway/ 2026-04-29T00:00:00.000Z 2026-04-29T00:00:00.000Z

Service Mesh Egress Gateway Patterns: Bounded Outbound Traffic in Istio Clusters Problem Outbound traffic from a Kubernetes cluster is a tangled topic. By default Istio’s sidecar proxies forward...

https://www.systemshardening.com/articles/network/wireguard-mesh/ 2026-04-29T00:00:00.000Z 2026-04-29T00:00:00.000Z

WireGuard Mesh for Internal Zero-Trust Networking: wg-quick, Tailscale, Netbird Compared Problem Internal networks at small-to-medium organizations have a recurring shape: a few cloud VPCs, a few...

https://www.systemshardening.com/articles/observability/alert-correlation/ 2026-04-29T00:00:00.000Z 2026-04-29T00:00:00.000Z

Alert Deduplication and Correlation Patterns: Beating Alert Fatigue at Scale Problem A medium-sized organization’s SOC ingests 5,000-50,000 alerts per day across SIEM, EDR, IDS, cloud-provider...

https://www.systemshardening.com/articles/observability/forensic-readiness/ 2026-04-29T00:00:00.000Z 2026-04-29T00:00:00.000Z

Forensic Readiness: Log Retention, Capture, and Chain of Custody for Incident Response Problem When an incident happens, the question isn’t “what’s our SIEM doing right now?” It’s “what data do we...

https://www.systemshardening.com/articles/observability/security-slos/ 2026-04-29T00:00:00.000Z 2026-04-29T00:00:00.000Z

Security SLOs and Error Budgets: SRE Discipline Applied to Detection and Response Problem Engineering organizations adopted SRE-style SLOs (service-level objectives) and error budgets a decade ago....

https://www.systemshardening.com/articles/wasm/wasm-cold-start/ 2026-04-29T00:00:00.000Z 2026-04-29T00:00:00.000Z

WASM Cold-Start Optimization for Security Workloads: Pre-Compilation, Snapshots, and AOT Problem Security-relevant WASM workloads run on the request hot path: auth filters, policy decisions, content...

https://www.systemshardening.com/articles/wasm/wasm-iot-embedded/ 2026-04-29T00:00:00.000Z 2026-04-29T00:00:00.000Z

WASM in IoT and Embedded Production: wasmEdge, wasm3, WAMR, and OTA Update Security Problem Edge and IoT deployments — industrial gateways, vehicle ECUs, smart appliances, building-automation...

https://www.systemshardening.com/articles/wasm/wasm-plugin-threat-modeling/ 2026-04-29T00:00:00.000Z 2026-04-29T00:00:00.000Z

WASM Plugin Architecture Threat Modeling: Trust Boundaries, Host-API Exposure, and Supply Chain Problem WASM is the lingua franca for plugin systems in 2026: Envoy plugins, NGINX filters, Postgres...

https://www.systemshardening.com/articles/ai-landscape/c2pa-content-credentials/ 2026-04-27T00:00:00.000Z 2026-04-27T00:00:00.000Z

C2PA Content Credentials: Cryptographic Provenance for AI-Generated Media in Production Problem Generative models produce images, video, and audio that pass as authentic camera output. The...

https://www.systemshardening.com/articles/ai-landscape/mcp-authentication/ 2026-04-27T00:00:00.000Z 2026-04-27T00:00:00.000Z

MCP Authentication Patterns: OAuth 2.1, Capability Tokens, and Per-Tool Authorization Problem Model Context Protocol (MCP) servers expose tools, resources, and prompts to LLM clients. An agent backed...

https://www.systemshardening.com/articles/ai-landscape/prompt-cache-security/ 2026-04-27T00:00:00.000Z 2026-04-27T00:00:00.000Z

Prompt Cache Security: Side-Channels, Poisoning, and Tenant Isolation in LLM Provider Caches Problem Major LLM providers introduced prompt caching in 2024-2025. Anthropic’s prompt caching (GA in...

https://www.systemshardening.com/articles/cicd/firecracker-kata-ci-runners/ 2026-04-27T00:00:00.000Z 2026-04-27T00:00:00.000Z

Ephemeral CI Runners with Firecracker and Kata: VM-Level Isolation for Build Jobs Problem Self-hosted CI runners are typically Linux containers (GitHub Actions Runner Controller, GitLab Runner with...

https://www.systemshardening.com/articles/cicd/oidc-federation-hardening/ 2026-04-27T00:00:00.000Z 2026-04-27T00:00:00.000Z

OIDC Federation Hardening: Locking Down CI-to-Cloud Trust Policies Problem OIDC federation between CI providers (GitHub Actions, GitLab, CircleCI, Buildkite) and cloud providers (AWS, GCP, Azure)...

https://www.systemshardening.com/articles/cicd/repo-policy-as-code/ 2026-04-27T00:00:00.000Z 2026-04-27T00:00:00.000Z

Branch Protection and Repository Policy as Code: Terraform GitHub for Hundreds of Repos Problem Branch protection — required reviewers, status checks, push restrictions, signed commits — is the gate...

https://www.systemshardening.com/articles/cross-cutting/secrets-rotation-orchestration/ 2026-04-27T00:00:00.000Z 2026-04-27T00:00:00.000Z

Secrets Rotation Orchestration: Coordinating Vault, KMS, OIDC, and Database Credentials Problem Rotation is the operation that matters most for credential security and most likely to cause an outage....

https://www.systemshardening.com/articles/cross-cutting/spiffe-spire-workload-identity/ 2026-04-27T00:00:00.000Z 2026-04-27T00:00:00.000Z

SPIFFE and SPIRE for Workload Identity Across Clusters and Clouds Problem Workloads need to authenticate to other workloads. The dominant patterns each have a structural problem: Shared API keys /...

https://www.systemshardening.com/articles/cross-cutting/threat-modeling-at-scale/ 2026-04-27T00:00:00.000Z 2026-04-27T00:00:00.000Z

Threat Modeling at Scale: STRIDE-per-Component, PASTA, and Continuous Threat Modeling Problem Threat modeling has been an industry-standard practice for two decades. Yet at most engineering...

https://www.systemshardening.com/articles/kubernetes/confidential-containers/ 2026-04-27T00:00:00.000Z 2026-04-27T00:00:00.000Z

Confidential Containers on Kubernetes: AMD SEV-SNP, Intel TDX, and the Attestation Flow Problem Standard container isolation depends on the host kernel. seccomp, AppArmor, capabilities, user...

https://www.systemshardening.com/articles/kubernetes/user-namespaces-pods/ 2026-04-27T00:00:00.000Z 2026-04-27T00:00:00.000Z

User Namespaces for Pods: UID Remapping, Container Escape Defense, and the GA Path in Kubernetes 1.30+ Problem Container security has long had an awkward asymmetry. A Pod’s container that runs as root...

https://www.systemshardening.com/articles/kubernetes/validating-admission-policy-cel/ 2026-04-27T00:00:00.000Z 2026-04-27T00:00:00.000Z

ValidatingAdmissionPolicy with CEL: Native Kubernetes Admission Without Webhooks Problem Webhook-based admission control (Kyverno, Gatekeeper, OPA, custom webhooks) has been the dominant pattern for...

https://www.systemshardening.com/articles/linux/fido2-ssh/ 2026-04-27T00:00:00.000Z 2026-04-27T00:00:00.000Z

FIDO2 SSH with sk-* Keys: Hardware-Backed Authentication for Production Hosts Problem Standard SSH keys live on disk. The private key is a file: ~/.ssh/id_ed25519. Anything that can read that file (a...

https://www.systemshardening.com/articles/linux/kernel-lockdown/ 2026-04-27T00:00:00.000Z 2026-04-27T00:00:00.000Z

Kernel Lockdown Mode: Blocking Root from Modifying the Running Kernel Problem Root traditionally has unrestricted access to the running kernel: load and unload modules, write to /dev/mem and...

https://www.systemshardening.com/articles/linux/landlock-lsm/ 2026-04-27T00:00:00.000Z 2026-04-27T00:00:00.000Z

Landlock LSM: Unprivileged Kernel Sandboxing for Production Linux Applications Problem Linux has had application sandboxing for two decades. Every existing option requires either privilege or...

https://www.systemshardening.com/articles/network/ebpf-xdp-ddos/ 2026-04-27T00:00:00.000Z 2026-04-27T00:00:00.000Z

eBPF-XDP for L4 DDoS Mitigation: Line-Rate Drop in the Kernel Problem Layer-4 floods (SYN flood, UDP amplification, raw packet floods at >1 Mpps) overwhelm a server long before the application gets...

https://www.systemshardening.com/articles/network/encrypted-client-hello/ 2026-04-27T00:00:00.000Z 2026-04-27T00:00:00.000Z

Encrypted Client Hello (ECH) Deployment on NGINX, Cloudflare, and Internal Edges Problem TLS 1.3 encrypts everything in the handshake except one critical field: the Server Name Indication (SNI). The...

https://www.systemshardening.com/articles/network/http2-flood-mitigation/ 2026-04-27T00:00:00.000Z 2026-04-27T00:00:00.000Z

HTTP/2 RST and CONTINUATION Flood Mitigation: CVE-2023-44487, CVE-2024-27316, and Beyond Problem HTTP/2 multiplexes many streams over a single TCP connection. The protocol’s design — streams created...

https://www.systemshardening.com/articles/observability/detection-engineering-metrics/ 2026-04-27T00:00:00.000Z 2026-04-27T00:00:00.000Z

Detection Engineering Metrics: MTTD, MTTR, Signal-to-Noise, and Coverage Tracking Problem Detection programs accumulate rules over time. A team starts with a handful of carefully-crafted detections;...

https://www.systemshardening.com/articles/observability/otel-pii-leakage/ 2026-04-27T00:00:00.000Z 2026-04-27T00:00:00.000Z

OpenTelemetry PII Leakage: Stopping Sensitive Data in Span Attributes, Baggage, and Logs Problem OpenTelemetry instrumentation, when applied with the default auto-instrumentation libraries, produces...

https://www.systemshardening.com/articles/observability/siem-cost-optimization/ 2026-04-27T00:00:00.000Z 2026-04-27T00:00:00.000Z

SIEM Cost Optimization: Cardinality, Retention, Sampling, and Index-Tier Strategy Problem SIEM bills follow a predictable trajectory: a vendor-pitched price quote at signing; a 2x increase the...

https://www.systemshardening.com/articles/wasm/edge-wasm-hardening/ 2026-04-27T00:00:00.000Z 2026-04-27T00:00:00.000Z

Edge Runtime WASM Hardening: Cloudflare Workers, Fastly Compute, and Multi-Tenant Isolation Problem Edge runtimes (Cloudflare Workers, Fastly Compute@Edge, Deno Deploy, Wasmer Edge, Vercel Edge...

https://www.systemshardening.com/articles/wasm/envoy-wasm-plugin-hardening/ 2026-04-27T00:00:00.000Z 2026-04-27T00:00:00.000Z

Envoy and Istio WASM Plugin Hardening: Resource Limits, ABI Selection, and Distribution Problem Envoy’s WASM extension model lets operators inject custom logic into the request path: header rewriting,...

https://www.systemshardening.com/articles/wasm/nginx-wasm-filters/ 2026-04-27T00:00:00.000Z 2026-04-27T00:00:00.000Z

NGINX WASM Filters with ngx_wasm_module: Request-Path Plugins, Resource Caps, and Distribution Problem NGINX has had ngx_http_lua_module and njs for years; both let operators inject custom logic into...

https://www.systemshardening.com/articles/wasm/reproducible-wasm-builds/ 2026-04-27T00:00:00.000Z 2026-04-27T00:00:00.000Z

Reproducible WASM Builds and SBOM Generation: Deterministic Compilation, CycloneDX, In-Toto Attestations Problem Reproducible builds — the property that the same source produces the same binary...

https://www.systemshardening.com/articles/wasm/wasi-http-server-hardening/ 2026-04-27T00:00:00.000Z 2026-04-27T00:00:00.000Z

WASI HTTP Server Hardening: Production Patterns for wasi:http/incoming-handler Problem wasi:http/incoming-handler is the WASI Preview 2 interface for serving HTTP. A component implements...

https://www.systemshardening.com/articles/wasm/wasi-preview-2-capabilities/ 2026-04-27T00:00:00.000Z 2026-04-27T00:00:00.000Z

WASI Preview 2 Capability-Based Security: filesystem, sockets, http, and the Component Model Problem WASI Preview 1 (the original system interface from 2019) modeled the world as a small flat...

https://www.systemshardening.com/articles/wasm/wasi-sockets-hardening/ 2026-04-27T00:00:00.000Z 2026-04-27T00:00:00.000Z

WASI Sockets API Hardening: TCP, UDP, and TLS Capability Scoping for Network-Bound WASM Problem WASI Preview 2 introduced wasi:sockets/tcp and wasi:sockets/udp — interfaces that let WASM modules...

https://www.systemshardening.com/articles/wasm/wasm-ai-inference/ 2026-04-27T00:00:00.000Z 2026-04-27T00:00:00.000Z

WASM AI Inference: Isolating ONNX Runtime Web, llama.cpp WASM, and On-Device Models Problem AI inference has historically run on GPUs in dedicated services. By 2026, a parallel pattern has emerged:...

https://www.systemshardening.com/articles/wasm/wasm-component-model-security/ 2026-04-27T00:00:00.000Z 2026-04-27T00:00:00.000Z

WASM Component Model Security Boundaries: Composition, Capability Passing, and Trust Decisions Problem The component model turns WebAssembly into a composition primitive. A component is a...

https://www.systemshardening.com/articles/wasm/wasm-in-databases/ 2026-04-27T00:00:00.000Z 2026-04-27T00:00:00.000Z

WASM in Databases: pg_wasm, ClickHouse UDFs, SurrealDB Extensions Problem Databases run user-supplied logic. Postgres has stored procedures (PL/pgSQL, PL/Python, PL/Perl, PL/Rust). ClickHouse has...

https://www.systemshardening.com/articles/wasm/wasm-multi-tenancy/ 2026-04-27T00:00:00.000Z 2026-04-27T00:00:00.000Z

WASM Multi-Tenancy Patterns: Resource Quotas, Fair Scheduling, and Tenant Isolation Failures Problem Running multiple tenants’ WASM workloads in a single runtime instance is the hard case for WASM...

https://www.systemshardening.com/articles/wasm/wasm-oci-signing/ 2026-04-27T00:00:00.000Z 2026-04-27T00:00:00.000Z

OCI WASM Module Signing and Verification: cosign, notation, and Admission-Time Enforcement Problem WebAssembly modules are distributed through OCI registries — the same ghcr.io, quay.io, docker.io,...

https://www.systemshardening.com/articles/wasm/wasm-on-kubernetes/ 2026-04-27T00:00:00.000Z 2026-04-27T00:00:00.000Z

WASM Workloads on Kubernetes: runwasi, Spin, and the Threat Model Shift from OCI Containers Problem WebAssembly workloads now run on Kubernetes the same way containers do: a Pod manifest, an OCI...

https://www.systemshardening.com/articles/wasm/wasm-static-analysis/ 2026-04-27T00:00:00.000Z 2026-04-27T00:00:00.000Z

WASM Module Static Analysis and Vulnerability Scanning: wasm-tools, twiggy, and CVE Detection Problem Container scanning is a mature ecosystem: Trivy, Grype, Snyk, Anchore, and many others ingest...

https://www.systemshardening.com/articles/wasm/wasmtime-production-hardening/ 2026-04-27T00:00:00.000Z 2026-04-27T00:00:00.000Z

Wasmtime Production Hardening: Fuel, Memory, Epoch Interrupts, and WASI Capability Allowlists Problem Wasmtime is the most widely-deployed standalone WebAssembly runtime — used inside Spin, wasmCloud,...

https://www.systemshardening.com/articles/wasm/wazero-hardening/ 2026-04-27T00:00:00.000Z 2026-04-27T00:00:00.000Z

Wazero Hardening for Go Embedders: Resource Limits, WASI Capabilities, and Plugin Isolation Problem Wazero is a WebAssembly runtime written entirely in Go, with no CGo and no external dependencies. By...

https://www.systemshardening.com/articles/ai-landscape/agent-memory-poisoning/ 2026-04-24T00:00:00.000Z 2026-04-24T00:00:00.000Z

Agent Memory Poisoning: Defending the Persistence Layer of Long-Running LLM Agents Problem Long-running agents need memory. Without it, every session starts from scratch — the agent cannot recall user...

https://www.systemshardening.com/articles/cicd/pipeline-egress-control/ 2026-04-24T00:00:00.000Z 2026-04-24T00:00:00.000Z

CI/CD Pipeline Egress Control: Runner Network Isolation, Allowlists, and Supply-Chain Exfiltration Defense Problem A typical CI/CD runner has: The repository’s full source, including any embedded...

https://www.systemshardening.com/articles/cross-cutting/post-quantum-migration/ 2026-04-24T00:00:00.000Z 2026-04-24T00:00:00.000Z

Post-Quantum Crypto Migration Plan: Hybrid TLS, SSH, Code Signing, and Encryption at Rest Problem Shor’s algorithm breaks RSA, DSA, and elliptic-curve cryptography in polynomial time on a sufficiently...

https://www.systemshardening.com/articles/kubernetes/gateway-api-security/ 2026-04-24T00:00:00.000Z 2026-04-24T00:00:00.000Z

Gateway API Security Patterns: Multi-Team Routing, ReferenceGrant, and Delegated Trust on Kubernetes Problem Kubernetes Ingress has a single resource type and a single implicit trust model: whoever...

https://www.systemshardening.com/articles/linux/io-uring-hardening/ 2026-04-24T00:00:00.000Z 2026-04-24T00:00:00.000Z

io_uring Security and Hardening: Disabling, Restricting, and Auditing a Bypass-Prone Syscall Interface Problem io_uring is a high-performance asynchronous I/O interface introduced in Linux 5.1....

https://www.systemshardening.com/articles/network/http3-quic-hardening/ 2026-04-24T00:00:00.000Z 2026-04-24T00:00:00.000Z

HTTP/3 and QUIC Production Hardening: UDP Amplification, 0-RTT Replay, and Connection ID Privacy Problem QUIC (RFC 9000) replaces TCP+TLS+HTTP/2 with an integrated transport that encrypts both the...

https://www.systemshardening.com/articles/observability/detection-as-code-sigma/ 2026-04-24T00:00:00.000Z 2026-04-24T00:00:00.000Z

Detection-as-Code with Sigma: Versioned, Tested, Vendor-Neutral SIEM Rules Problem Most security teams maintain detection logic in three incompatible places: the SIEM’s rule editor (Splunk SPL,...

https://www.systemshardening.com/articles/ai-landscape/ai-adaptive-malware-defence/ 2026-04-23T00:00:00.000Z 2026-04-23T00:00:00.000Z

AI-Adaptive Malware: How Modern Payloads Change Behaviour Based on Their Environment and How to Defend Against Them Problem A virus in 2020 was a static binary. It had one payload, one persistence...

https://www.systemshardening.com/articles/ai-landscape/ai-powered-security-assessments/ 2026-04-23T00:00:00.000Z 2026-04-23T00:00:00.000Z

Running AI-Powered Security Assessments on Your Own Infrastructure: Using Frontier Models Before Attackers Do Problem Anthropic announced that Mythos is significantly better at discovering cyber...

https://www.systemshardening.com/articles/ai-landscape/ai-social-engineering-defence/ 2026-04-23T00:00:00.000Z 2026-04-23T00:00:00.000Z

Defending Against AI-Amplified Social Engineering: Phishing, Voice Cloning, and Deepfake Impersonation Problem Every traditional indicator of phishing is gone. In 2020, a phishing email was...

https://www.systemshardening.com/articles/ai-landscape/mythos-proactive-attack-surface-reduction/ 2026-04-23T00:00:00.000Z 2026-04-23T00:00:00.000Z

Mythos and the Vulnerability Classes AI Finds First: Eliminating Your Highest-Risk Attack Surface Problem Anthropic announced that Mythos, their frontier AI model, is significantly better at...

https://www.systemshardening.com/articles/cicd/software-supply-chain-third-party-risk/ 2026-04-23T00:00:00.000Z 2026-04-23T00:00:00.000Z

Software Supply Chain and Third-Party Exposure: Defending Against Upstream Compromise Problem The most efficient way to compromise 10,000 organisations is to compromise one library they all depend...

https://www.systemshardening.com/articles/cross-cutting/identity-abuse-credential-compromise/ 2026-04-23T00:00:00.000Z 2026-04-23T00:00:00.000Z

Identity Abuse and Credential Compromise: Defending Against Attackers Who Log In Instead of Break In Problem The primary intrusion method has shifted. By 2026, nearly 80% of detected intrusions are...

https://www.systemshardening.com/articles/cross-cutting/ransomware-multi-extortion-defence/ 2026-04-23T00:00:00.000Z 2026-04-23T00:00:00.000Z

Ransomware 3.0 and Multi-Stage Extortion: Defence, Detection, and Recovery Problem Ransomware in 2020 was straightforward: encrypt the victim’s files, demand payment for the decryption key. If you had...

https://www.systemshardening.com/articles/kubernetes/llm-kubernetes-threat-model/ 2026-04-23T00:00:00.000Z 2026-04-23T00:00:00.000Z

LLMs on Kubernetes: Understanding the Threat Model and Deploying an LLM Gateway Problem A standard Ollama deployment on Kubernetes looks operationally sound: pods are healthy, readiness probes pass,...

https://www.systemshardening.com/articles/linux/secure-cloud-vm-access/ 2026-04-23T00:00:00.000Z 2026-04-23T00:00:00.000Z

Secure Cloud VM Access: SSH Key Authentication, Two-Factor Login, VPN, and Audit Logging Problem A cloud VM with SSH exposed on port 22 to the public internet receives thousands of brute-force login...

https://www.systemshardening.com/articles/network/ddos-megascale-defence/ 2026-04-23T00:00:00.000Z 2026-04-23T00:00:00.000Z

DDoS Megascale Operations: Defending Against AI-Orchestrated Terabit Attacks and Botnet Smokescreens Problem DDoS attacks have crossed the terabit-per-second threshold and they are not slowing down....

https://www.systemshardening.com/articles/cicd/cicd-secret-management/ 2026-04-21T00:00:00.000Z 2026-04-21T00:00:00.000Z

Secret Management in CI/CD Pipelines: Vault, SOPS, and OIDC Federation Problem Static credentials in CI/CD pipelines are the leading cause of secret sprawl. Teams store long-lived API keys, database...

https://www.systemshardening.com/articles/network/ipv6-security/ 2026-04-21T00:00:00.000Z 2026-04-21T00:00:00.000Z

IPv6 Security in Production: Hardening Dual-Stack Deployments Problem Most production environments run dual-stack (IPv4 and IPv6) whether the team intended it or not. Linux enables IPv6 by default....

https://www.systemshardening.com/articles/cicd/sbom/ 2026-04-19T00:00:00.000Z 2026-04-19T00:00:00.000Z

Software Bill of Materials (SBOM) Generation and Consumption in CI/CD Problem SBOM generation is easy, run Syft, get a list of every package in your container image. SBOM consumption is hard: when a...

https://www.systemshardening.com/articles/ai-landscape/training-data-extraction/ 2026-04-16T00:00:00.000Z 2026-04-16T00:00:00.000Z

Training Data Extraction Prevention: Stopping Models from Leaking Memorised Data Problem Large language models memorise portions of their training data. Given the right prompt, a model will reproduce...

https://www.systemshardening.com/articles/linux/ssh-hardening/ 2026-04-16T00:00:00.000Z 2026-04-16T00:00:00.000Z

SSH Hardening Beyond the Basics: Certificate Authentication, Jump Hosts, and Logging Problem Every SSH hardening guide starts and ends with the same three changes: disable root login, require...

https://www.systemshardening.com/articles/kubernetes/node-hardening/ 2026-04-15T00:00:00.000Z 2026-04-15T00:00:00.000Z

Kubernetes Node Hardening: From OS Configuration to kubelet Lockdown Problem A Kubernetes node is a Linux machine running kubelet, a container runtime, and your workloads. If the node is compromised,...

https://www.systemshardening.com/articles/observability/otel-collector-hardening/ 2026-04-15T00:00:00.000Z 2026-04-15T00:00:00.000Z

Securing the OpenTelemetry Collector: Deployment Patterns, TLS, and Access Control Problem The OpenTelemetry Collector sits at the center of every modern observability pipeline. Every trace, metric,...

https://www.systemshardening.com/articles/observability/security-dashboards/ 2026-04-13T00:00:00.000Z 2026-04-13T00:00:00.000Z

Security Dashboards That Engineers Actually Use: Grafana Designs for Hardening Verification Problem Most security dashboards are vanity metrics, total alerts this month, pie charts of vulnerability...

https://www.systemshardening.com/articles/ai-landscape/model-extraction-prevention/ 2026-04-12T00:00:00.000Z 2026-04-12T00:00:00.000Z

Model Extraction Prevention: Detecting and Blocking Model Stealing Through API Queries Problem Model extraction (model stealing) is an attack where an adversary queries a production ML API...

https://www.systemshardening.com/articles/kubernetes/gpu-isolation/ 2026-04-12T00:00:00.000Z 2026-04-12T00:00:00.000Z

GPU Workload Isolation: MIG, MPS, and vGPU Security Boundaries Problem Multi-tenant GPU sharing without isolation risks data leakage between workloads through shared GPU memory. NVIDIA offers three...

https://www.systemshardening.com/articles/network/grpc-api-gateway-patterns/ 2026-04-12T00:00:00.000Z 2026-04-12T00:00:00.000Z

gRPC API Gateway Patterns: Authentication, Rate Limiting, and Request Validation at the Edge Problem Exposing gRPC services through an API gateway introduces security problems that do not exist with...

https://www.systemshardening.com/articles/ai-landscape/securing-ai-agents/ 2026-04-11T00:00:00.000Z 2026-04-11T00:00:00.000Z

Securing AI Agents in Production: Tool-Use Boundaries, Credential Scoping, and Output Verification Problem AI agents are being deployed with production tool access: shell execution, kubectl, terraform...

https://www.systemshardening.com/articles/linux/dns-resolution-hardening/ 2026-04-11T00:00:00.000Z 2026-04-11T00:00:00.000Z

Hardening DNS Resolution on Linux: systemd-resolved, Unbound, and DNS-over-TLS Problem Most Linux hosts resolve DNS in plaintext over UDP port 53. On a stock Ubuntu 24.04 or RHEL 9 system: Every DNS...

https://www.systemshardening.com/articles/cross-cutting/hardening-scorecard/ 2026-04-10T00:00:00.000Z 2026-04-10T00:00:00.000Z

The Hardening Scorecard: Measuring and Tracking Security Posture Problem “Are we more secure than last month?” is a question most teams cannot answer. Security tools produce individual outputs:...

https://www.systemshardening.com/articles/network/nginx-hardening-beyond-tls/ 2026-04-10T00:00:00.000Z 2026-04-10T00:00:00.000Z

NGINX Hardening Beyond TLS: Request Filtering, Buffer Limits, and Connection Controls Problem Most NGINX hardening guides stop at TLS configuration, cipher suites, certificate setup, HSTS. In...

https://www.systemshardening.com/articles/observability/otel-security-tracing/ 2026-04-09T00:00:00.000Z 2026-04-09T00:00:00.000Z

OpenTelemetry for Security: Distributed Tracing of Authentication and Authorization Flows Problem Distributed tracing is standard for performance debugging, but almost no team uses it for security....

https://www.systemshardening.com/articles/ai-landscape/ai-governance-pipeline/ 2026-04-08T00:00:00.000Z 2026-04-08T00:00:00.000Z

Building an AI Governance Pipeline: Automated Checks from Training to Production Problem AI governance in most organisations is a manual process. A model is trained, someone writes a document, a...

https://www.systemshardening.com/articles/linux/sysctl-kernel-hardening/ 2026-04-08T00:00:00.000Z 2026-04-08T00:00:00.000Z

Hardening the Linux Kernel Attack Surface with sysctl and Boot Parameters Problem Linux kernels ship with defaults optimised for compatibility, not security. On a stock Ubuntu 24.04 or RHEL 9...

https://www.systemshardening.com/articles/observability/otel-collector-pipelines/ 2026-04-08T00:00:00.000Z 2026-04-08T00:00:00.000Z

OpenTelemetry Collector Pipelines: Securing Receivers, Processors, and Exporters Problem The OpenTelemetry Collector is a vendor-neutral proxy that receives, processes, and exports telemetry data. Out...

https://www.systemshardening.com/articles/kubernetes/gpu-cost-security-monitoring/ 2026-04-06T00:00:00.000Z 2026-04-06T00:00:00.000Z

GPU Cost and Security Monitoring: Detecting Abuse and Optimising Spend Problem GPU compute costs between $2 and $30 per hour per device. A single unauthorised cryptocurrency mining pod running on an...

https://www.systemshardening.com/articles/network/rate-limiting-ingress/ 2026-04-06T00:00:00.000Z 2026-04-06T00:00:00.000Z

Rate Limiting at the Ingress Layer: NGINX, Envoy, and Cloud Load Balancers Compared Problem Rate limiting is the first line of defence against abuse, credential stuffing, API scraping, and...

https://www.systemshardening.com/articles/network/internal-api-protection/ 2026-04-05T00:00:00.000Z 2026-04-05T00:00:00.000Z

Protecting Internal APIs: Network Segmentation, Authentication, and Access Logging Problem “It’s internal” is the most dangerous phrase in infrastructure security. Internal APIs sit behind the...

https://www.systemshardening.com/articles/ai-landscape/ai-supply-chain-attack-surface/ 2026-04-04T00:00:00.000Z 2026-04-04T00:00:00.000Z

AI Supply Chain Attack Surface: Models, Datasets, and Inference Dependencies Problem AI systems introduce a supply chain attack surface that traditional software security does not cover. The three new...

https://www.systemshardening.com/articles/ai-landscape/eu-ai-act-compliance/ 2026-04-03T00:00:00.000Z 2026-04-03T00:00:00.000Z

EU AI Act Compliance for Infrastructure Teams: Risk Classification, Documentation, and Technical Controls Problem The EU AI Act entered into force in August 2024, with enforcement timelines staggered...

https://www.systemshardening.com/articles/kubernetes/llm-rate-limiting/ 2026-04-03T00:00:00.000Z 2026-04-03T00:00:00.000Z

LLM Rate Limiting in Production: Token Budgets, Per-User Quotas, and Abuse Detection Problem Traditional API rate limiting counts requests. One request equals one unit. This assumption collapses with...

https://www.systemshardening.com/articles/cicd/terraform-security/ 2026-04-02T00:00:00.000Z 2026-04-02T00:00:00.000Z

Terraform Security: State File Protection, Provider Pinning, and Plan Review Automation Problem Terraform state files contain every secret, IP address, and configuration detail of your infrastructure...

https://www.systemshardening.com/articles/kubernetes/falco-runtime-security/ 2026-04-02T00:00:00.000Z 2026-04-02T00:00:00.000Z

Runtime Security with Falco on Kubernetes: Rules, Tuning, and Response Automation Problem Prevention-only security has a binary failure mode: either the control holds and the attacker is stopped, or...

https://www.systemshardening.com/articles/network/load-balancer-security/ 2026-04-02T00:00:00.000Z 2026-04-02T00:00:00.000Z

Load Balancer Security: Health Check Abuse, Connection Draining, and TLS Termination Problem Load balancers sit at the most critical point in your infrastructure: every external request passes through...

https://www.systemshardening.com/articles/ai-landscape/mcp-tool-permission-patterns/ 2026-04-01T00:00:00.000Z 2026-04-01T00:00:00.000Z

MCP Tool Permission Patterns: Least Privilege, Approval Workflows, and Scope Boundaries Problem An MCP server exposes a set of tools. A connected agent can invoke any of them. Out of the box, there is...

https://www.systemshardening.com/articles/ai-landscape/claude-code-vulnerability/ 2026-03-31T00:00:00.000Z 2026-03-31T00:00:00.000Z

Claude for Application Security: Finding Logic Vulnerabilities in Source Code Problem Static application security testing (SAST) tools find pattern-based vulnerabilities effectively. Semgrep matches...

https://www.systemshardening.com/articles/network/api-gateway-security/ 2026-03-30T00:00:00.000Z 2026-03-30T00:00:00.000Z

API Gateway Security: Authentication, Authorization, and Request Validation Problem Without a centralized API gateway, authentication and authorization logic is duplicated in every backend service....

https://www.systemshardening.com/articles/ai-landscape/auditing-ai-actions/ 2026-03-29T00:00:00.000Z 2026-03-29T00:00:00.000Z

Auditing AI Actions at Scale: Building Tamper-Proof Logs for Non-Human Actors Problem AI agents operate at machine speed, generating 10-100x the audit data of human operators. A single agent making 50...

https://www.systemshardening.com/articles/cicd/container-registry-security/ 2026-03-29T00:00:00.000Z 2026-03-29T00:00:00.000Z

Container Registry Security: Access Control, Vulnerability Scanning, and Garbage Collection Problem Container registries store the most sensitive artifacts in your deployment pipeline. Every image...

https://www.systemshardening.com/articles/kubernetes/kubernetes-network-policies/ 2026-03-29T00:00:00.000Z 2026-03-29T00:00:00.000Z

Kubernetes Network Policies That Actually Work: From Default Deny to Microsegmentation Problem By default, every pod in a Kubernetes cluster can communicate with every other pod across all namespaces....

https://www.systemshardening.com/articles/cross-cutting/compliance-as-code/ 2026-03-28T00:00:00.000Z 2026-03-28T00:00:00.000Z

Compliance-as-Code: Mapping CIS Benchmarks to Automated Checks with InSpec and Kube-bench Problem Manual compliance audits are point-in-time snapshots that are outdated before the report is written....

https://www.systemshardening.com/articles/kubernetes/llm-cost-controls/ 2026-03-28T00:00:00.000Z 2026-03-28T00:00:00.000Z

LLM Cost Controls: Budget Enforcement, Token Metering, and Spend Alerting Problem LLM costs are unpredictable by default. A single API call to a frontier model can cost $0.001 or $2.00 depending on...

https://www.systemshardening.com/articles/cicd/pipeline-config-security/ 2026-03-26T00:00:00.000Z 2026-03-26T00:00:00.000Z

Pipeline-as-Code Security: Preventing CI Configuration Tampering Problem CI/CD pipeline definitions live alongside application code in Git. Whoever can modify .github/workflows/, .gitlab-ci.yml, or...

https://www.systemshardening.com/articles/kubernetes/kubelet-security/ 2026-03-26T00:00:00.000Z 2026-03-26T00:00:00.000Z

Kubelet Security Configuration: Authentication, Authorization, and Read-Only Port Problem The kubelet runs on every node in the cluster with root-level access to the container runtime, all pod...

https://www.systemshardening.com/articles/linux/grub-boot-hardening/ 2026-03-23T00:00:00.000Z 2026-03-23T00:00:00.000Z

Hardening GRUB and the Boot Process: Secure Boot, Boot Passwords, and Tamper Detection Problem Without boot security, an attacker with physical access or console access (BMC, IPMI, cloud serial...

https://www.systemshardening.com/articles/ai-landscape/mcp-transport-security/ 2026-03-22T00:00:00.000Z 2026-03-22T00:00:00.000Z

MCP Transport Security: Securing stdio, SSE, and HTTP Channels for Model Context Protocol Problem The Model Context Protocol defines how AI agents communicate with tool servers. The transport layer is...

https://www.systemshardening.com/articles/kubernetes/rbac-design-patterns/ 2026-03-22T00:00:00.000Z 2026-03-22T00:00:00.000Z

Kubernetes RBAC Design Patterns: Least Privilege Without Paralysing Developers Problem RBAC sprawl in multi-team Kubernetes clusters grows past 100 role bindings within months. The core tension is...

https://www.systemshardening.com/articles/ai-landscape/claude-kubernetes-audit/ 2026-03-21T00:00:00.000Z 2026-03-21T00:00:00.000Z

Claude for Kubernetes Security Auditing: Finding Privilege Escalation Paths Scanners Cannot See Problem Kubernetes security scanners evaluate resources individually. Tools like kube-bench check node...

https://www.systemshardening.com/articles/kubernetes/secrets-management/ 2026-03-21T00:00:00.000Z 2026-03-21T00:00:00.000Z

Kubernetes Secrets Management: External Secrets Operator, Vault, and Sealed Secrets Problem Kubernetes Secrets are base64-encoded, not encrypted. Running kubectl get secret my-secret -o...

https://www.systemshardening.com/articles/ai-landscape/llm-jailbreak-defence/ 2026-03-20T00:00:00.000Z 2026-03-20T00:00:00.000Z

LLM Jailbreak Defence: Detecting and Preventing System Prompt Bypasses in Production Problem LLM jailbreaks are inputs that cause a model to ignore its system prompt, safety training, or usage...

https://www.systemshardening.com/articles/kubernetes/ai-incident-forensics/ 2026-03-19T00:00:00.000Z 2026-03-19T00:00:00.000Z

AI Incident Forensics: Reconstructing What an AI System Did, Why, and What Data It Accessed Problem When a traditional application causes an incident, you examine logs, traces, and database queries to...

https://www.systemshardening.com/articles/network/tls-nginx-envoy/ 2026-03-19T00:00:00.000Z 2026-03-19T00:00:00.000Z

TLS 1.3 Configuration for NGINX and Envoy: Ciphers, Certificates, and OCSP Stapling Problem TLS misconfiguration remains one of the most common security findings in production infrastructure. Servers...

https://www.systemshardening.com/articles/ai-landscape/ai-agent-output-verification/ 2026-03-18T00:00:00.000Z 2026-03-18T00:00:00.000Z

Verifying AI Agent Output: Deterministic Checks, Human-in-the-Loop Gates, and Rollback Safety Problem AI agents generate infrastructure configurations, database migrations, deployment manifests, and...

https://www.systemshardening.com/articles/cicd/helm-values-hardening/ 2026-03-18T00:00:00.000Z 2026-03-18T00:00:00.000Z

Hardening Helm Values: Schema Validation, Secret Injection, and Security Defaults Problem Helm values files are the primary interface for configuring Kubernetes workloads, and they control...

https://www.systemshardening.com/articles/kubernetes/inference-endpoint-hardening/ 2026-03-18T00:00:00.000Z 2026-03-18T00:00:00.000Z

Hardening Model Inference Endpoints: Authentication, Rate Limiting, and Input Validation Problem Model inference endpoints are GPU-backed and expensive, $2-30 per hour per GPU. A single unprotected...

https://www.systemshardening.com/articles/network/mtls-service-mesh/ 2026-03-18T00:00:00.000Z 2026-03-18T00:00:00.000Z

mTLS for Service-to-Service Communication: Istio, Linkerd, and DIY with cert-manager Problem Internal service-to-service traffic in most Kubernetes clusters is plaintext. Once an attacker compromises...

https://www.systemshardening.com/articles/ai-landscape/mcp-server-security/ 2026-03-17T00:00:00.000Z 2026-03-17T00:00:00.000Z

Securing MCP Servers: Authentication, Tool Sandboxing, and Input Validation for Model Context Protocol Problem The Model Context Protocol (MCP) gives AI agents structured access to tools: filesystem...

https://www.systemshardening.com/articles/cicd/securing-cicd-runners/ 2026-03-14T00:00:00.000Z 2026-03-14T00:00:00.000Z

Securing CI/CD Runners: Isolation, Credential Scoping, and Ephemeral Environments Problem CI/CD runners are the most privileged, least monitored components in most infrastructure. A self-hosted runner...

https://www.systemshardening.com/articles/cross-cutting/postgresql-hardening/ 2026-03-13T00:00:00.000Z 2026-03-13T00:00:00.000Z

Hardening PostgreSQL for Production: Authentication, Encryption, Row-Level Security, and Audit Logging Problem PostgreSQL defaults prioritise developer convenience over security. A stock installation...

https://www.systemshardening.com/articles/observability/lateral-movement-detection/ 2026-03-13T00:00:00.000Z 2026-03-13T00:00:00.000Z

Lateral Movement Detection: Network Patterns, Authentication Anomalies, and Alert Correlation Problem East-west traffic inside a Kubernetes cluster is a blind spot for most security teams. Once an...

https://www.systemshardening.com/articles/linux/proc-sys-hardening/ 2026-03-11T00:00:00.000Z 2026-03-11T00:00:00.000Z

Hardening /proc and /sys: Restricting Kernel Information Disclosure Problem /proc and /sys are virtual filesystems that expose kernel internals, hardware details, and process information to userspace....

https://www.systemshardening.com/articles/ai-landscape/claude-iac-review/ 2026-03-10T00:00:00.000Z 2026-03-10T00:00:00.000Z

Claude for Infrastructure-as-Code Security Review: Terraform, CloudFormation, and Pulumi Problem Infrastructure-as-Code scanners like Checkov, tflint, and cfn-lint enforce policy through pattern...

https://www.systemshardening.com/articles/ai-landscape/llm-prompt-security-patterns/ 2026-03-10T00:00:00.000Z 2026-03-10T00:00:00.000Z

LLM Prompt Security Patterns: System Prompt Protection, Input Sanitisation, and Context Isolation Problem Every LLM application has a system prompt. It defines the model’s role, its constraints, what...

https://www.systemshardening.com/articles/kubernetes/kubernetes-admission-control/ 2026-03-10T00:00:00.000Z 2026-03-10T00:00:00.000Z

Kubernetes Admission Control: From PodSecurity Standards to Custom OPA/Kyverno Policies Problem Without admission control, any user with deployment permissions can run privileged containers, mount the...

https://www.systemshardening.com/articles/ai-landscape/algorithmic-auditing/ 2026-03-09T00:00:00.000Z 2026-03-09T00:00:00.000Z

Algorithmic Auditing: Testing AI Systems for Bias, Fairness, and Safety Before Deployment Problem AI systems make decisions that affect people: who gets approved for a loan, whose resume gets...

https://www.systemshardening.com/articles/cross-cutting/complete-kubernetes-hardening/ 2026-03-09T00:00:00.000Z 2026-03-09T00:00:00.000Z

Hardening a Complete Kubernetes Platform: From Cluster Bootstrap to Production-Ready Problem A fresh Kubernetes cluster (whether bootstrapped with kubeadm, k3s, or provisioned by a managed provider)...

https://www.systemshardening.com/articles/kubernetes/ai-data-leakage-prevention/ 2026-03-08T00:00:00.000Z 2026-03-08T00:00:00.000Z

AI Data Leakage Prevention: Input Filtering, Output Scanning, and Audit Trails Problem AI systems leak data in ways traditional applications do not. A language model trained on customer data can...

https://www.systemshardening.com/articles/linux/auditd-deep-dive/ 2026-03-08T00:00:00.000Z 2026-03-08T00:00:00.000Z

Linux Audit Framework Deep Dive: auditd Rules, auditctl, and ausearch for Security Monitoring Problem auditd is the kernel-level audit system on Linux, it captures syscalls, file access, user...

https://www.systemshardening.com/articles/kubernetes/jupyter-notebook-security/ 2026-03-06T00:00:00.000Z 2026-03-06T00:00:00.000Z

Jupyter Notebook Security: Authentication, Isolation, and Data Protection Problem JupyterHub is a code execution platform. Every notebook cell is arbitrary code running with whatever permissions the...

https://www.systemshardening.com/articles/network/grpc-load-balancing-security/ 2026-03-05T00:00:00.000Z 2026-03-05T00:00:00.000Z

gRPC Load Balancing Security: Client-Side, Proxy, and Service Mesh Patterns Problem gRPC uses HTTP/2, which multiplexes many requests over a single TCP connection. This creates a fundamental conflict...

https://www.systemshardening.com/articles/observability/prometheus-security-metrics/ 2026-03-05T00:00:00.000Z 2026-03-05T00:00:00.000Z

Security-Relevant Prometheus Metrics: What to Collect, How to Alert, When to Page Problem Prometheus is deployed in most Kubernetes environments for infrastructure monitoring (CPU, memory, disk,...

https://www.systemshardening.com/articles/ai-landscape/claude-non-human-consumers/ 2026-03-04T00:00:00.000Z 2026-03-04T00:00:00.000Z

Claude, Mythos, and the Non-Human Infrastructure Consumer: Writing Hardening Guides for AI Agents Problem AI models are no longer just tools that engineers use to write code. They are becoming direct...

https://www.systemshardening.com/articles/cross-cutting/incident-response-hardening-playbook/ 2026-03-02T00:00:00.000Z 2026-03-02T00:00:00.000Z

Incident Response Hardening Playbook: From Detection to Post-Mortem Problem During an active security incident, hardening is reactive: isolate the compromised system, contain the blast radius,...

https://www.systemshardening.com/articles/kubernetes/multi-tenancy-hardening/ 2026-03-02T00:00:00.000Z 2026-03-02T00:00:00.000Z

Multi-Tenancy Hardening in Kubernetes: Namespace Isolation, Resource Quotas, and Network Boundaries Problem Kubernetes namespaces provide logical separation, not security isolation. By default, pods...

https://www.systemshardening.com/articles/network/dns-security-dnssec-caa/ 2026-03-02T00:00:00.000Z 2026-03-02T00:00:00.000Z

DNS Security for Production Infrastructure: DNSSEC, CAA Records, and Internal Resolution Problem DNS is the most critical single point of failure in any infrastructure, and the least hardened layer...

https://www.systemshardening.com/articles/cicd/helm-chart-security/ 2026-03-01T00:00:00.000Z 2026-03-01T00:00:00.000Z

Securing Helm Charts: Chart Signing, Value Injection, and Template Security Problem Helm is the dominant package manager for Kubernetes, but most teams install charts without verifying provenance,...

https://www.systemshardening.com/articles/kubernetes/ai-content-filtering-pipeline/ 2026-03-01T00:00:00.000Z 2026-03-01T00:00:00.000Z

Building a Content Filtering Pipeline for LLM Applications: From Raw Input to Safe Output Problem A single content filter is not a pipeline. Most LLM deployments add one filter (usually on output) and...

https://www.systemshardening.com/articles/kubernetes/ai-red-teaming/ 2026-03-01T00:00:00.000Z 2026-03-01T00:00:00.000Z

AI Red Teaming Methodology: Structured Adversarial Testing for LLM Applications Problem Traditional security testing (penetration testing, vulnerability scanning) does not cover AI-specific attack...

https://www.systemshardening.com/articles/kubernetes/image-policy-enforcement/ 2026-02-26T00:00:00.000Z 2026-02-26T00:00:00.000Z

Kubernetes Image Policy Enforcement: Cosign, Notation, and Admission Webhooks Problem Without image policy enforcement, any container image from any registry can run in a Kubernetes cluster. A...

https://www.systemshardening.com/articles/linux/nftables/ 2026-02-26T00:00:00.000Z 2026-02-26T00:00:00.000Z

Linux Firewall Hardening with nftables: Replacing iptables in Production Problem iptables is deprecated. nftables is the replacement in every modern Linux kernel (5.0+). Most teams either still use...

https://www.systemshardening.com/articles/cicd/helm-supply-chain-security/ 2026-02-25T00:00:00.000Z 2026-02-25T00:00:00.000Z

Helm Supply Chain Security: OCI Registries, Provenance Verification, and Chart Mirroring Problem Helm charts are executable Kubernetes manifests packaged as tarballs. Most teams install them without...

https://www.systemshardening.com/articles/cross-cutting/security-infra-disaster-recovery/ 2026-02-24T00:00:00.000Z 2026-02-24T00:00:00.000Z

Security Infrastructure Disaster Recovery: Vault, PKI, and SIEM Failover Problem When your security infrastructure fails, you are flying blind. If Vault is down, applications cannot retrieve secrets...

https://www.systemshardening.com/articles/kubernetes/rag-security/ 2026-02-24T00:00:00.000Z 2026-02-24T00:00:00.000Z

Securing RAG Pipelines: Vector Database Access Control, Document Poisoning, and Retrieval Filtering Problem Retrieval-Augmented Generation (RAG) adds a knowledge base to LLM applications, the model...

https://www.systemshardening.com/articles/ai-landscape/detecting-ai-attacks/ 2026-02-23T00:00:00.000Z 2026-02-23T00:00:00.000Z

Detecting AI-Generated Attacks: Moving from Signatures to Behavioural Baselines Problem Signature-based detection (WAF CRS rules, static Falco rules, antivirus signatures) matches “known bad.”...

https://www.systemshardening.com/articles/kubernetes/pod-security-context/ 2026-02-23T00:00:00.000Z 2026-02-23T00:00:00.000Z

Pod Security Context Deep Dive: runAsNonRoot, readOnlyRootFilesystem, and Capabilities Problem Kubernetes SecurityContext has over 15 configurable fields, but most teams only set runAsNonRoot: true...

https://www.systemshardening.com/articles/network/waf-rule-tuning/ 2026-02-22T00:00:00.000Z 2026-02-22T00:00:00.000Z

WAF Rule Tuning That Does Not Break Legitimate Traffic: ModSecurity and Coraza in Practice Problem A self-managed Web Application Firewall (WAF) with default rules generates dozens of false positives...

https://www.systemshardening.com/articles/observability/ebpf-tetragon/ 2026-02-22T00:00:00.000Z 2026-02-22T00:00:00.000Z

eBPF-Based Security Monitoring: Tetragon for Process, Network, and File Observability Problem Falco monitors syscalls for runtime detection. Tetragon (CNCF/Cilium) goes deeper: it monitors process...

https://www.systemshardening.com/articles/ai-landscape/adversarial-embedding-attacks/ 2026-02-21T00:00:00.000Z 2026-02-21T00:00:00.000Z

Adversarial Attacks on Embeddings: Poisoning Vector Stores and Manipulating Semantic Search Problem Embedding-based retrieval powers RAG pipelines, semantic search, recommendation systems, and...

https://www.systemshardening.com/articles/cross-cutting/migrate-prometheus-grafana-cloud/ 2026-02-21T00:00:00.000Z 2026-02-21T00:00:00.000Z

Migrating from Self-Hosted Prometheus to Grafana Cloud: Preserving Dashboards, Alerts, and History Problem Self-hosted Prometheus consumes 500GB+ storage within 6 months for a 20-node Kubernetes...

https://www.systemshardening.com/articles/linux/cgroup-resource-isolation/ 2026-02-21T00:00:00.000Z 2026-02-21T00:00:00.000Z

Cgroup v2 Resource Isolation: Preventing Resource Exhaustion Attacks on Shared Systems Problem Without resource limits, a single service, container, or compromised process can consume all available...

https://www.systemshardening.com/articles/linux/selinux/ 2026-02-21T00:00:00.000Z 2026-02-21T00:00:00.000Z

SELinux in Production: Writing Custom Policies Without Losing Your Mind Problem SELinux is the most powerful mandatory access control system on Linux, and the most disabled. The majority of...

https://www.systemshardening.com/articles/ai-landscape/ai-vulnerability-discovery/ 2026-02-19T00:00:00.000Z 2026-02-19T00:00:00.000Z

AI-Powered Vulnerability Discovery: What Automated Code Analysis Means for Your Patch Cycle Problem AI models can now discover exploitable vulnerabilities in source code faster than human researchers....

https://www.systemshardening.com/articles/cicd/artifact-integrity/ 2026-02-19T00:00:00.000Z 2026-02-19T00:00:00.000Z

Artifact Integrity Verification: Checksums, Signatures, and Transparency Logs Problem Build artifacts pass through multiple stages between source code and production deployment. Source is compiled in...

https://www.systemshardening.com/articles/ai-landscape/agent-to-agent-trust/ 2026-02-18T00:00:00.000Z 2026-02-18T00:00:00.000Z

Agent-to-Agent Trust: Authentication, Delegation, and Capability Boundaries in Multi-Agent Systems Problem Multi-agent systems are moving from research demos to production deployments. A coordinator...

https://www.systemshardening.com/articles/ai-landscape/llm-deployment-security/ 2026-02-18T00:00:00.000Z 2026-02-18T00:00:00.000Z

Securing LLM Deployments: Model Loading, Runtime Isolation, and Inference Infrastructure Problem Deploying a language model into production is not just a machine learning problem. It is an...

https://www.systemshardening.com/articles/kubernetes/vector-database-security/ 2026-02-18T00:00:00.000Z 2026-02-18T00:00:00.000Z

Vector Database Security: Access Control, Embedding Protection, and Query Isolation Problem Vector databases are the backbone of RAG (Retrieval-Augmented Generation) systems. They store document...

https://www.systemshardening.com/articles/ai-landscape/threat-model-ai-augmented/ 2026-02-17T00:00:00.000Z 2026-02-17T00:00:00.000Z

The Threat Model Has Changed: Rewriting Security Assumptions for an AI-Augmented World Problem Every security architecture is built on assumptions about what attackers can do, how fast they can do it,...

https://www.systemshardening.com/articles/kubernetes/ab-deployment-safety/ 2026-02-16T00:00:00.000Z 2026-02-16T00:00:00.000Z

A/B Model Deployment Safety: Canary Rollouts, Traffic Splitting, and Automated Rollback for ML Models Problem Deploying a new ML model version is not the same as deploying a new application version. A...

https://www.systemshardening.com/articles/kubernetes/api-server-hardening/ 2026-02-15T00:00:00.000Z 2026-02-15T00:00:00.000Z

Kubernetes API Server Hardening: Flags, Authentication, and Audit Logging Problem The API server is the front door to the Kubernetes cluster. Every kubectl command, every controller reconciliation,...

https://www.systemshardening.com/articles/linux/time-sync-security/ 2026-02-15T00:00:00.000Z 2026-02-15T00:00:00.000Z

Time Synchronization Security: Hardening NTP and Chrony Against Manipulation Problem Accurate time is a silent dependency of almost every security control on a Linux system. When an attacker can...

https://www.systemshardening.com/articles/cicd/securing-github-actions/ 2026-02-13T00:00:00.000Z 2026-02-13T00:00:00.000Z

Securing GitHub Actions: Permissions, Pinning, and Workflow Injection Prevention Problem GitHub Actions is the most widely used CI/CD platform, but its security model is scattered across dozens of...

https://www.systemshardening.com/articles/linux/ansible-os-hardening/ 2026-02-12T00:00:00.000Z 2026-02-12T00:00:00.000Z

Automated OS Hardening with Ansible: A Production-Ready Playbook Collection Problem Manual OS hardening does not scale. The sysctl settings from Hardening the Linux Kernel Attack Surface with sysctl...

https://www.systemshardening.com/articles/cross-cutting/message-queue-hardening/ 2026-02-10T00:00:00.000Z 2026-02-10T00:00:00.000Z

Securing Message Queues in Production: Kafka, RabbitMQ, and NATS Hardening Problem Message brokers carry some of the most sensitive data in any architecture, payment events, user actions, system...

https://www.systemshardening.com/articles/observability/log-integrity/ 2026-02-10T00:00:00.000Z 2026-02-10T00:00:00.000Z

Log Integrity and Tamper Detection: Ensuring Your Audit Trail Is Trustworthy Problem An attacker’s first post-compromise action is covering their tracks. On a Linux host, this means deleting...

https://www.systemshardening.com/articles/kubernetes/seccomp-profiles/ 2026-02-09T00:00:00.000Z 2026-02-09T00:00:00.000Z

Seccomp Profiles for Production Workloads: Writing, Testing, and Deploying Custom Profiles Problem The default container runtime allows approximately 300 syscalls. A compromised container can use...

https://www.systemshardening.com/articles/observability/container-escape-detection/ 2026-02-07T00:00:00.000Z 2026-02-07T00:00:00.000Z

Container Escape Detection: Runtime Signals, Kernel Indicators, and Response Automation Problem Container escapes are the highest-impact attack in Kubernetes. A single compromised pod that escapes its...

https://www.systemshardening.com/articles/cross-cutting/multi-cloud-hardening/ 2026-02-04T00:00:00.000Z 2026-02-04T00:00:00.000Z

Multi-Cloud Hardening: Consistent Security Posture Across Providers Problem Running infrastructure across multiple cloud providers means maintaining consistent security controls across fundamentally...

https://www.systemshardening.com/articles/ai-landscape/ai-model-cards/ 2026-02-02T00:00:00.000Z 2026-02-02T00:00:00.000Z

AI Model Cards in Production: Documenting Capabilities, Limitations, and Security Properties Problem Every production AI model has boundaries: input domains where it performs well, edge cases where it...

https://www.systemshardening.com/articles/linux/pam-hardening/ 2026-02-02T00:00:00.000Z 2026-02-02T00:00:00.000Z

PAM Configuration Hardening: Password Policies, Login Controls, and MFA Integration Problem PAM (Pluggable Authentication Modules) is the authentication foundation on Linux. Default PAM stacks allow...

https://www.systemshardening.com/articles/ai-landscape/ai-control-plane/ 2026-02-01T00:00:00.000Z 2026-02-01T00:00:00.000Z

Hardening the AI Control Plane: Kill Switches, Rate Limits, and Human-in-the-Loop Gates Problem AI agents with write access to production systems can execute 100+ infrastructure changes per minute. A...

https://www.systemshardening.com/articles/ai-landscape/ai-compressing-attacker-timeline/ 2026-01-30T00:00:00.000Z 2026-01-30T00:00:00.000Z

How AI Is Compressing the Attacker Timeline: What Defenders Need to Change Now Problem The gap between vulnerability disclosure and weaponised exploit used to be measured in weeks. In 2020, the median...

https://www.systemshardening.com/articles/ai-landscape/membership-inference-defence/ 2026-01-28T00:00:00.000Z 2026-01-28T00:00:00.000Z

Membership Inference Defence: Preventing Attackers from Determining Training Data Inclusion Problem Membership inference attacks determine whether a specific data record was used to train a model. An...

https://www.systemshardening.com/articles/cicd/dependency-pinning/ 2026-01-28T00:00:00.000Z 2026-01-28T00:00:00.000Z

Dependency Pinning and Lockfile Integrity: Preventing Supply Chain Attacks in CI Problem Dependency confusion and typosquatting attacks exploit the gap between “I declared a dependency” and “I...

https://www.systemshardening.com/articles/kubernetes/etcd-encryption/ 2026-01-28T00:00:00.000Z 2026-01-28T00:00:00.000Z

etcd Encryption at Rest: Configuration, Key Rotation, and Performance Impact Problem Kubernetes Secrets are stored in etcd as base64-encoded plaintext. Base64 is an encoding, not encryption. Anyone...

https://www.systemshardening.com/articles/linux/kernel-module-hardening/ 2026-01-28T00:00:00.000Z 2026-01-28T00:00:00.000Z

Kernel Module Hardening: Blacklisting, Signing, and Preventing Runtime Loading Problem The Linux kernel loads modules on demand. When a process requests a capability that is not built into the running...

https://www.systemshardening.com/articles/cross-cutting/zero-trust-networking/ 2026-01-27T00:00:00.000Z 2026-01-27T00:00:00.000Z

Zero Trust Networking: Identity-Based Access Beyond Perimeter Security Problem Perimeter security assumes the internal network is safe. It is not. A single compromised pod, a stolen VPN credential, or...

https://www.systemshardening.com/articles/observability/k8s-audit-log-design/ 2026-01-27T00:00:00.000Z 2026-01-27T00:00:00.000Z

Kubernetes Audit Log Pipeline Design: From API Server to SIEM Problem Kubernetes audit logging at the RequestResponse level captures everything: every API call, every request body, every response...

https://www.systemshardening.com/articles/ai-landscape/agent-tool-use-sandboxing/ 2026-01-26T00:00:00.000Z 2026-01-26T00:00:00.000Z

Sandboxing AI Agent Tool Use: Filesystem, Network, and Process Isolation for Autonomous Actions Problem AI agents execute tool calls on real infrastructure: writing files, running shell commands,...

https://www.systemshardening.com/articles/ai-landscape/claude-security-detection/ 2026-01-26T00:00:00.000Z 2026-01-26T00:00:00.000Z

Claude for Security Detection: How Large Language Models Find What Scanners Miss Problem Traditional security scanners operate on pattern matching. They check for known CVEs in dependency trees, match...

https://www.systemshardening.com/articles/kubernetes/ai-guardrails-implementation/ 2026-01-26T00:00:00.000Z 2026-01-26T00:00:00.000Z

Implementing AI Guardrails: Input Validation, Output Filtering, and Safety Classifiers in Production Problem Deploying an LLM without guardrails is deploying an application where any user can make it...

https://www.systemshardening.com/articles/linux/container-base-images/ 2026-01-26T00:00:00.000Z 2026-01-26T00:00:00.000Z

Hardening Container Base Images: From ubuntu:latest to a Minimal, Signed, Scannable Image Problem ubuntu:latest ships with over 200 packages. At any given point, a vulnerability scan with Trivy will...

https://www.systemshardening.com/articles/ai-landscape/ai-assisted-hardening/ 2026-01-23T00:00:00.000Z 2026-01-23T00:00:00.000Z

Using AI to Harden Systems: Automated Configuration Review and Remediation Problem Manual security review of infrastructure-as-code takes 2-4 hours per pull request for complex changes. A team...

https://www.systemshardening.com/articles/cicd/reproducible-builds/ 2026-01-23T00:00:00.000Z 2026-01-23T00:00:00.000Z

Reproducible Builds for Container Images: Achieving Deterministic Output Problem Two builds from the same source code should produce the same container image. In practice, they almost never do....

https://www.systemshardening.com/articles/kubernetes/ingress-controller-comparison/ 2026-01-23T00:00:00.000Z 2026-01-23T00:00:00.000Z

Hardening Kubernetes Ingress Controllers: NGINX, Traefik, and Envoy Compared Problem The ingress controller is the internet-facing entry point to a Kubernetes cluster. Every external HTTP request...

https://www.systemshardening.com/articles/kubernetes/llm-observability-production/ 2026-01-23T00:00:00.000Z 2026-01-23T00:00:00.000Z

LLM Observability in Production: Monitoring Latency, Token Usage, Safety Violations, and Drift Problem Traditional application monitoring (CPU, memory, HTTP status codes, latency) tells you nothing...

https://www.systemshardening.com/articles/observability/crypto-mining-detection/ 2026-01-23T00:00:00.000Z 2026-01-23T00:00:00.000Z

Crypto Mining Detection: CPU Patterns, Network Signatures, and Automated Response Problem Cryptojacking is the most common post-compromise activity in Kubernetes environments. It is profitable for...

https://www.systemshardening.com/articles/observability/detection-rules/ 2026-01-23T00:00:00.000Z 2026-01-23T00:00:00.000Z

Building Detection Rules That Don’t Cry Wolf: Alert Design for Security Events Problem Security detection that generates 50+ false positives per day is worse than no detection, it trains the team to...

https://www.systemshardening.com/articles/kubernetes/model-serving-hardening/ 2026-01-22T00:00:00.000Z 2026-01-22T00:00:00.000Z

Hardening Model Serving Frameworks: TorchServe, Triton, and vLLM Security Configuration Problem Model serving frameworks ship with defaults optimised for development: management APIs exposed on all...

https://www.systemshardening.com/articles/kubernetes/fine-tuning-pipeline-security/ 2026-01-21T00:00:00.000Z 2026-01-21T00:00:00.000Z

Securing Fine-Tuning Pipelines: Data Isolation, Checkpoint Integrity, and Access Control Problem Fine-tuning pipelines are high-value targets. They consume expensive GPU hours, process proprietary...

https://www.systemshardening.com/articles/cicd/gitops-security/ 2026-01-20T00:00:00.000Z 2026-01-20T00:00:00.000Z

GitOps Security Model: Separation of Duties, Drift Detection, and Rollback Controls Problem GitOps centralizes deployment authority in Git repositories. Tools like ArgoCD and Flux watch Git...

https://www.systemshardening.com/articles/network/request-smuggling-prevention/ 2026-01-20T00:00:00.000Z 2026-01-20T00:00:00.000Z

Preventing HTTP Request Smuggling: Configuration for NGINX, HAProxy, and Envoy Problem HTTP request smuggling exploits inconsistencies in how chained HTTP processors (reverse proxies, load balancers,...

https://www.systemshardening.com/articles/kubernetes/scheduler-hardening/ 2026-01-19T00:00:00.000Z 2026-01-19T00:00:00.000Z

Hardening the Kubernetes Scheduler: Topology Constraints and Security-Aware Placement Problem The Kubernetes scheduler places pods on nodes based on resource availability and basic constraints. By...

https://www.systemshardening.com/articles/observability/certificate-expiry-monitoring/ 2026-01-19T00:00:00.000Z 2026-01-19T00:00:00.000Z

Certificate Expiry Monitoring: Automated Detection Across TLS, mTLS, and Signing Certificates Problem Certificate expiry is the most common cause of preventable production outages. When a TLS...

https://www.systemshardening.com/articles/observability/incident-response-runbooks/ 2026-01-19T00:00:00.000Z 2026-01-19T00:00:00.000Z

Incident Response Runbooks: Structured Procedures for Common Security Events Problem Detection without documented response is security theatre. Most teams have alerts that fire at 3 AM, but no written...

https://www.systemshardening.com/articles/ai-landscape/ai-credential-delegation/ 2026-01-18T00:00:00.000Z 2026-01-18T00:00:00.000Z

AI Credential Delegation: Short-Lived Tokens, Scope Narrowing, and Audit Trails for Agent Access Problem AI agents need credentials to do useful work: database passwords, API keys, Kubernetes service...

https://www.systemshardening.com/articles/linux/apparmor/ 2026-01-18T00:00:00.000Z 2026-01-18T00:00:00.000Z

AppArmor Profiles for Custom Applications: From Complain Mode to Enforce Problem AppArmor is the default mandatory access control system on Ubuntu and Debian. It restricts applications to specific...

https://www.systemshardening.com/articles/kubernetes/audit-log-analysis/ 2026-01-17T00:00:00.000Z 2026-01-17T00:00:00.000Z

Kubernetes Audit Log Analysis: What to Log, How to Query, and What to Alert On Problem Kubernetes audit logs record every request to the API server: who made the request, what they asked for, and...

https://www.systemshardening.com/articles/linux/systemd-unit-hardening/ 2026-01-17T00:00:00.000Z 2026-01-17T00:00:00.000Z

systemd Unit Hardening: ProtectSystem, PrivateTmp, and the Full Sandbox Toolkit Problem systemd provides over 30 security-relevant directives for sandboxing services, yet the vast majority of unit...

https://www.systemshardening.com/articles/network/http-security-headers/ 2026-01-17T00:00:00.000Z 2026-01-17T00:00:00.000Z

HTTP Security Headers in Production: CSP, HSTS, and Permissions-Policy Without Breaking Your App Problem Security headers are free, server-side controls that instruct browsers to restrict dangerous...

https://www.systemshardening.com/articles/network/websocket-hardening/ 2026-01-16T00:00:00.000Z 2026-01-16T00:00:00.000Z

Hardening WebSocket Connections: Authentication, Rate Limiting, and Origin Validation Problem WebSocket connections start as an HTTP upgrade request and then persist as a long-lived, full-duplex...

https://www.systemshardening.com/articles/observability/centralized-logging/ 2026-01-16T00:00:00.000Z 2026-01-16T00:00:00.000Z

Centralized Logging Architecture for Security: Fluentd, Vector, and Loki Compared Problem Self-managed log infrastructure is one of the highest operational costs for small-to-medium teams. The choice...

https://www.systemshardening.com/articles/kubernetes/model-artifact-pipelines/ 2026-01-15T00:00:00.000Z 2026-01-15T00:00:00.000Z

Securing Model Artifact Pipelines: From Training to Serving Problem Model files are opaque binaries ranging from 1GB to over 1TB. You cannot code-review a set of weights. An attacker who tampers with...

https://www.systemshardening.com/articles/observability/audit-log-pipeline/ 2026-01-13T00:00:00.000Z 2026-01-13T00:00:00.000Z

Building a Security Audit Log Pipeline That Scales: auditd to Elasticsearch Problem Linux audit logs are the ground truth for security investigation. auditd captures kernel-level events that no...

https://www.systemshardening.com/articles/ai-landscape/ai-incident-reporting/ 2026-01-12T00:00:00.000Z 2026-01-12T00:00:00.000Z

AI Incident Reporting: Detection, Classification, and Response Procedures for AI System Failures Problem Traditional incident response assumes failures are binary: the service is up or it is down, the...

https://www.systemshardening.com/articles/ai-landscape/claude-incident-triage/ 2026-01-12T00:00:00.000Z 2026-01-12T00:00:00.000Z

Claude for Security Incident Triage: Rapid Analysis of Logs, Alerts, and Blast Radius Problem When a security alert fires at 2 AM, the on-call engineer faces an information overload problem. The alert...

https://www.systemshardening.com/articles/cross-cutting/hardening-small-teams/ 2026-01-12T00:00:00.000Z 2026-01-12T00:00:00.000Z

Security Hardening for Small Teams: Prioritising Controls When You Cannot Do Everything Problem A team of 1-5 engineers cannot implement 100 hardening controls simultaneously. Most hardening guides...

https://www.systemshardening.com/articles/kubernetes/rlhf-data-protection/ 2026-01-12T00:00:00.000Z 2026-01-12T00:00:00.000Z

RLHF Data Protection: Securing Human Feedback Loops, Preference Data, and Reward Models Problem Reinforcement Learning from Human Feedback (RLHF) pipelines introduce unique security surfaces that...

https://www.systemshardening.com/articles/cicd/slsa-provenance/ 2026-01-11T00:00:00.000Z 2026-01-11T00:00:00.000Z

SLSA Provenance for Container Images: From Build to Admission Control Problem Without provenance, you cannot prove where a container image came from, what source code it was built from, or whether the...

https://www.systemshardening.com/articles/kubernetes/ai-api-key-management/ 2026-01-11T00:00:00.000Z 2026-01-11T00:00:00.000Z

AI API Key Management: Rotation, Scoping, and Abuse Detection Problem AI services have turned API keys into direct spending controls. A leaked OpenAI or Anthropic key can generate thousands of dollars...

https://www.systemshardening.com/articles/kubernetes/prompt-injection/ 2026-01-11T00:00:00.000Z 2026-01-11T00:00:00.000Z

Prompt Injection Defence in Production: Input Validation, Output Filtering, and Monitoring Problem Prompt injection is the SQL injection of AI systems, the most common and most damaging attack class...

https://www.systemshardening.com/articles/linux/filesystem-mount-options/ 2026-01-08T00:00:00.000Z 2026-01-08T00:00:00.000Z

Filesystem Mount Options That Matter: noexec, nosuid, nodev, and Beyond Problem Default Linux installations mount most filesystems with permissive options. On a stock Ubuntu 24.04 or RHEL 9...

https://www.systemshardening.com/articles/network/grpc-security/ 2026-01-08T00:00:00.000Z 2026-01-08T00:00:00.000Z

gRPC Security in Production: TLS, Authentication, and Interceptor-Based Access Control Problem gRPC services in production frequently run with security configurations that would never be acceptable...

https://www.systemshardening.com/articles/kubernetes/ai-training-network-segmentation/ 2026-01-07T00:00:00.000Z 2026-01-07T00:00:00.000Z

Network Segmentation for AI Training Infrastructure Problem AI training clusters frequently share networks with production services. A training job that can reach the production database is one...

https://www.systemshardening.com/articles/cross-cutting/migrate-to-managed-k8s/ 2026-01-06T00:00:00.000Z 2026-01-06T00:00:00.000Z

Migrating from Self-Managed Kubernetes to a Managed Provider Without Losing Your Security Posture Problem Self-managed Kubernetes clusters (kubeadm, k3s, kops) consume 8-16 hours per month of...

https://www.systemshardening.com/articles/kubernetes/llm-observability/ 2026-01-05T00:00:00.000Z 2026-01-05T00:00:00.000Z

Observability for LLM Applications: Token Usage, Latency Anomalies, and Output Classification Problem LLM-powered applications have unique observability requirements that standard APM tools do not...

https://www.systemshardening.com/articles/kubernetes/model-registry-access-control/ 2026-01-03T00:00:00.000Z 2026-01-03T00:00:00.000Z

Model Registry Access Control: Versioning, Signing, and Promotion Gates Problem Model registries are the bridge between training and production. A model pushed to the production registry gets served...

https://www.systemshardening.com/articles/cross-cutting/redis-hardening/ 2026-01-01T00:00:00.000Z 2026-01-01T00:00:00.000Z

Hardening Redis in Production: Authentication, TLS, ACLs, and Command Restriction Problem Redis defaults prioritise developer convenience: no authentication, no TLS, all 200+ commands available, and...

https://www.systemshardening.com/articles/kubernetes/service-account-tokens/ 2026-01-01T00:00:00.000Z 2026-01-01T00:00:00.000Z

Kubernetes Service Account Token Security: Bound Tokens, Projected Volumes, and OIDC Problem Every pod in Kubernetes receives a service account token by default. In clusters running older...