📰 Dev.to · david

Two Raspberry Pis run DNS for an entire network with no one watching them most of the time. A hardware watchdog, fail2ban, an additive nftables host firewall th

Multiple rounds of 'reconstruct the firewall' work each added a fresh generation of rules without removing the old one. Because RouterOS evaluates rules in orde

Most Kubernetes clusters accept any container image, any privilege level, and any resource configuration by default. Kyverno lets you enforce policies at admiss

A full-history gitleaks scan of a homelab repo that had been running for months turned up 12 distinct plaintext secrets — including an OIDC signing key. Here's

kubectl apply succeeds, the field reverts within seconds, and there's no error anywhere. Two ArgoCD debugging patterns that hit the same homelab three times in

Deploy a production-grade monitoring stack on bare-metal k3s: Prometheus, Loki with Garage S3 storage, Promtail on edge nodes via Ansible, SNMP monitoring for M

Replace MinIO with Garage — a single 50MB binary — as the Velero backup target. Full daily cluster backups with Longhorn volume snapshots, deployed via ArgoCD.

How to build a production-grade Kubernetes homelab with K3s, Authelia SSO, Longhorn storage, and ArgoCD — and the five painful mistakes that will cost you hours

Deploy Headscale on a bare-metal k3s cluster with Longhorn persistence, Traefik ingress, and Authelia OIDC authentication — fully GitOps-managed via ArgoCD.

How to get a real external IP on a bare-metal Kubernetes cluster using MetalLB L2 mode, and wire it up with Traefik for automatic HTTPS — fully GitOps-managed w

How to manage an entire Kubernetes homelab — MetalLB, Traefik, Longhorn, Authelia, and more — as a Git repository using ArgoCD's App-of-Apps pattern.

Learn how to enforce strict VLAN isolation, fast-track traffic, and build a default-deny firewall for MikroTik RouterOS using Infrastructure as Code.

A deep dive into architecting a Zero-Trust Let's Encrypt automation using Terraform, Azure Private Link, and VNet Integration.

A technical deep-dive into the network security requirements of NIS2 Article 21 and how to implement them in Azure using Terraform — with concrete code, not leg

How to automate wildcard Let's Encrypt certificates on a bare-metal K3s cluster using cert-manager's DNS-01 challenge with Cloudflare — and why HTTP-01 won't wo

How to build an enterprise-grade Azure network architecture that blocks internet traffic by default and survives aggressive DeployIfNotExists (DINE) policies —

NIS2 Article 21 in Azure: Implementing Network Security Controls with Terraform Tags: terraform,...

Your Terraform pipeline is green. The deployment completes without errors. You grab a coffee. Ten...

Your Terraform pipeline is green. The deployment completes. You grab a coffee. Ten minutes later,...

Automating SSL/TLS certificates with Let's Encrypt and Azure Key Vault is a solved problem. Tools...

You add a Route Table to force all internet-bound traffic (0.0.0.0/0) from your Spoke VNets into an...

A real build story: how I implemented visual product search in a Telegram marketplace bot using SigLIP, Qdrant, and ONNX quantization — and why it changed user