security Archives - Page 5 of 9

OAuth 2.0 and OpenID Connect Security: Common Vulnerabilities and How to Implement Them Correctly

April 28, 2026

OAuth 2.0 and OpenID Connect are the backbone of modern authentication, but misconfiguration is common and costly. This guide covers the most frequent vulnerabilities — missing state parameters, open redirects, improper token validation — and shows you how to implement each step correctly with practical Python examples.

Security

Automating SSL/TLS Certificate Lifecycle Management with cert-manager on Kubernetes

April 27, 2026

Manual SSL certificate management fails at scale — expiry dates get missed, secrets fall out of sync, and incidents happen over weekends. This guide walks through setting up cert-manager on Kubernetes to automate certificate issuance and renewal from both Let's Encrypt and a private internal CA, so you never chase an expiry date again.

HomeLab

Stop Renting Your Security: Self-Host Vaultwarden on Docker

April 27, 2026

Tired of cloud breaches and monthly fees? Learn how to host your own lightweight, secure password vault using Vaultwarden and Docker in under 10 minutes.

DevOps

Ditch Docker Hub Limits: A Production-Grade Guide to Self-Hosting Harbor

April 26, 2026

Stop relying on shared Docker Hub accounts. This guide shows you how to deploy Harbor for production, implement automated Trivy vulnerability scanning, and secure your CI/CD pipeline based on real-world scaling experience.

Networking

VPN Kill Switch on Linux: A 180-Day Production Post-Mortem

April 26, 2026

A deep dive into building a production-grade VPN Kill Switch for Linux. Using iptables and WireGuard, this guide shows you how to prevent IP leaks with kernel-level enforcement.

Security

Kubernetes RBAC Complete Guide: Configuring Role, ClusterRole, and ServiceAccount for Least Privilege Access

April 25, 2026

Kubernetes RBAC is your first line of defense against lateral movement inside a cluster. This guide walks through creating custom Roles, ClusterRoles, and ServiceAccounts with least privilege — including verification steps and common pitfalls to avoid.

DevOps

Linkerd on Kubernetes: Zero-Config mTLS and Observability That Actually Works

April 24, 2026

Simplify your Kubernetes networking. This guide shows you how to deploy Linkerd for automated mTLS, sub-millisecond latency, and instant observability without the complexity of Istio.

DevOps

Automating Kubernetes Secret Management with External Secrets Operator: Syncing AWS and Vault

April 22, 2026

Stop managing Kubernetes secrets manually. This guide shows you how to use External Secrets Operator to automatically sync sensitive data from AWS Secrets Manager and HashiCorp Vault directly into your cluster for a secure GitOps workflow.

Linux

Automating Security Patches: A Guide to Unattended-Upgrades on Debian and Ubuntu

April 20, 2026

Tired of manual updates? Learn to automate security patches on Debian and Ubuntu. This guide covers installation, smart reboots, and production-ready configurations.

Security

Hardening Linux with Firejail: A 6-Month Review of App Sandboxing

April 19, 2026

Standard Linux permissions are an all-or-nothing game. After 6 months of testing, I've found Firejail to be the most effective way to sandbox apps and protect sensitive data without the headache of SELinux.