# security

SSL verification errors are one of those issues that bite you at the worst possible moment — usually in production, usually when you're on-call. Here's you...

Set up Vault's Kubernetes auth method so pods authenticate using their ServiceAccount tokens — then inject secrets via Vault Agent sidecar or the Vault Secrets Operator. Zero hardcoded credentials in your cluster.

How to set up and use HashiCorp Vault for secrets management — KV secrets engine, dynamic credentials, policies, AppRole authentication, and production hardening. Stop hardcoding credentials in environment variables.

How to use Alpine Linux as a Docker base image effectively — understanding musl libc compatibility, multi-stage builds, layer optimization, and the security trade-offs versus glibc-based distributions.

Advanced HAProxy SSL configuration — multi-domain SNI routing from a single frontend, mutual TLS (mTLS) for service-to-service authentication, certificate management, and OCSP stapling.

How to set up JFrog Artifactory, configure local and remote repositories, integrate with Docker and build tools, use Artifactory query language for artifact searches, and set up release bundles.

How to use JFrog Xray to scan Docker images, Maven JARs, and npm packages for CVEs and license violations — setting up security policies, watching repositories, and blocking builds with policy violations.

How to integrate Nexus Repository Manager into GitHub Actions and Jenkins pipelines — publishing artifacts, pulling from proxy repos, tagging releases, and using Nexus IQ for security scanning.

A production security baseline for Rocky Linux 9 — covering SELinux configuration, firewalld rules, SSH hardening, auditd, AIDE integrity checking, and CIS Benchmark compliance checks.

How to keep Ubuntu servers patched automatically without unplanned reboots — combining unattended-upgrades, Canonical Livepatch, and USN monitoring into a practical patching strategy.

Cross-account resource access in AWS is like giving someone the keys to your house—you want them to get in, but only through the right door, at the right t...

Resolve Jenkins Groovy sandbox errors by approving script signatures, configuring the script security plugin, and using safe alternatives.

Harden Apache SSL/TLS configuration to achieve an A+ rating on Qualys SSL Labs with modern cipher suites and security headers.

Build AWS IAM policies using least privilege without locking yourself out — practical patterns for roles, service accounts, and permission boundaries.

Integrate JFrog Xray into your artifact pipeline to detect CVEs, license violations, and block insecure images from reaching production.

How to implement zero-trust pod-to-pod communication in Kubernetes using NetworkPolicies — deny by default, allow explicitly, and validate it works.

How to use systemd's built-in sandboxing directives to isolate services, restrict filesystem access, and harden daemons without containers.

Implement Nginx rate limiting using limit_req and limit_conn to protect APIs from abuse, brute force, and traffic spikes in production.

Harden Kubernetes clusters for production with RBAC, network policies, pod security standards, secrets management, and admission controllers.

Security headers and configuration reference — copy-paste snippets for Nginx, Kubernetes Ingress, Cloudflare, and Helmet.js.

Encrypt sensitive data with Ansible Vault — encrypt files, inline variables, multi-password setups, and integrate with external secret managers like HashiCorp Vault.

Enable mutual TLS in Istio, configure PeerAuthentication and AuthorizationPolicy, and secure service-to-service communication with zero-trust principles.

Create and manage Linux users and groups, configure sudo access, understand /etc/passwd and /etc/shadow, and implement PAM authentication policies.

Generate short-lived database credentials, AWS IAM roles, and PKI certificates with Vault dynamic secrets — eliminating long-lived credentials from your infrastructure.

Install HashiCorp Vault, understand seal/unseal mechanics, configure secret engines, and store your first secrets with policies and authentication methods.

Add automated dependency vulnerability scanning to your CI pipeline using Trivy and Grype. Catch known CVEs before they hit production.

Harden GitHub Actions security with least-privilege permissions, OIDC federation, SHA-pinned actions, and secrets management best practices.

How to configure encryption at rest for Kubernetes secrets using KMS providers, because your secrets in etcd are stored in plaintext by default.

Deploy OPA Gatekeeper to enforce Kubernetes admission policies — block privileged containers, enforce labels, and prevent misconfigurations.

Use Mozilla SOPS to encrypt secrets in Git for secure GitOps workflows. Covers AGE, AWS KMS, and ArgoCD integration with real examples.

How to implement zero-trust networking in Kubernetes using NetworkPolicies — deny by default, allow by exception, and sleep better at night.

Set up Trivy for container image vulnerability scanning — from local development to CI/CD pipeline integration with actionable remediation.

Learn everything about Kubernetes Pod Security Standards (PSS) and Pod Security Admission (PSA) — from baseline to restricted profiles with practical examples.

Implement least-privilege RBAC in Kubernetes to prevent lateral movement and privilege escalation — with real threat models and pipeline-ready examples.

Integrate HashiCorp Vault with Kubernetes to eliminate static secrets from your cluster — with working manifests, threat models, and pipeline automation.

Sign and verify your container images with Sigstore Cosign to prevent supply chain attacks — with keyless signing, SBOM attestation, and Kubernetes admission enforcement.