If you are running a mail server using Virtualmin / Webmin and testing your domain on security checkers like Internet.nl, you might encounter issues with DANE (DNS-based Authentication of Named Entities) validation. In this guide, we’ll walk through how we diagnosed a failing DANE setup, converted Let’s Encrypt certificates to the modern Elliptic Curve (EC)…Read more
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Using a Raspberry Pi Zero 2 W as a USB Ethernet Gadget Router on Raspberry Pi OS Bookworm (2025)
The Raspberry Pi Zero 2 W can act as a USB Ethernet device when connected to a host computer. This makes it possible to create a fully isolated, point‑to‑point network link over USB — ideal for headless access, provisioning, or embedded deployments. Raspberry Pi OS Bookworm introduced changes to the boot partition layout and USB…Read more
Authentik to IP whitelist traefik (WIP)
Disclaimer: This document is not yet finished and will be subject of change s long as there is WIP (Work in Progress) in the title of this post. For my homelab I am using as you might already know Authentik for a Single Sign On sollution. This authentik is behind a traefik reverse proxy. I…Read more
Restarting vm/containers if they get swapped out
It is quite easy to over demand on the capabilities of you machine when you’re running proxmox. The most claimed resource is definately memory. If you’re really squeezing every bit of memory out of your machine, you will encounter the situation that a vm will be swapped out. So you suddenly see that your host…Read more
Ntfy notifications
Ntfy.sh is a website that offers a notification service. The fun part of this is that they also give you the possibility to self host your own ntfy server. So I’ve spun one up in Docker: Similar to my other docker containers: After the stack is running in portainer, you will have a ntfy server…Read more
Passing your GPU to a docker container in a proxmox environment
This is the first post of a few all related to getting started on AI yourself. When using AI a GPU very quickly will be something you want to incorporate in your setup. This means impacts though the way you configure everything regarding hardware and software. This example will assume that the physical server (with…Read more