Dennis Kappel

DK

About

A quick snapshot of how I work and what I enjoy building.

I’m a system enthusiast who enjoys tightening up homelab setups, documenting complex installs, and automating repeatable workflows. Whether it’s building VPN-gated media stacks on Raspberry Pi, hardening self-hosted services, or guiding teams through new tools, I focus on clarity, reliability, and maintainability.

SK

Skills & Stacks

Tools and practices I use to ship dependable setups.

Platforms & Tools

Docker Compose Raspberry Pi 4 Intel N100 + Proxmox NordVPN routing Netbird + Zitadel

Practices

Media automation (Aarr stack) Self-hosted security (AdGuardHome, Vaultwarden) Remote access hardening Automation & documentation Backups & uptime

HL

Live-Stack

Up-to-date services running across the homelab and external VPS.

Raspberry Pi 4

Aarr-Stack routed behind NordVPN with proxy rules and a strict killswitch.

Pi-based

• Sonarr, Radarr, Prowlarr, Lidarr, Bazarr, Overseerr all tunneled through NordVPN.
• Compose extras: Termix, Dozzle, Homepage, qBittorrent, jDownloader, custom-aniworld-downloadr.
• AudiobookShelf, Cronmaster, and a Telegram notification bot for automation and alerts.
• DMS (paperless-ngx)

Intel N100

Proxmox host tuned for GPU-accelerated media and network services.

Proxmox

• Proxmox with GPU passthrough powering Jellyfin streaming.
• AdGuardHome DNS to keep network filtering local and reliable.
• Lightweight VMs/LXCs balanced for efficiency across the node.

Externally Hosted VPS

Remote stack anchored to the Kappel.Tech domain and secured mesh access.

VPS

• Netbird mesh with Zitadel-backed identity for remote administration.
• Kappel.Tech hosting Nextcloud, Vaultwarden, and Keyhelp-powered mail.
• Configured to mirror lab reliability while omitting deprecated services.

WK

Open Source I use/used in my career/job

Production-friendly tooling and collaborations I rely on.

Signaturee Project

I build this for my company to automate signature-rollout (6 different Domains, 1 MainAccount).

Private Github Project

• tailored to work for one User with multiple shared Mailboxes for different Domains
• Pulling data from the AD (defined variables as $USERDATA) .
• lightweight cli-menu to navigate the creation.
• checks the AD for "Memberof" - SN to ensure Users are getting only the Signature they should have.
• One-Button-Mass-Generation Possible for everyone in the Company.

Operational Tooling

Open-source services applied/configured, maintainted in professional environments (at my current Job).

Ops

• Zoneminder (Security-Camera Software)
• Grafana (Metrics + Dashboard)
• Zammad (Ticket-System)
• Ansible (for simple Raspberry Setups)
• Tactical RMM
• Snipe-IT (Asset-Manager)
• Bookstack (company DOCS)
• NGINX (Proxy)

PR

Projects

A grouped look at the platforms and automations I build and maintain.

Signaturee (Open)

Rebuilding a project I did for my company to OpenSource it - *work in progress*

Github

• Pulling data/variables from AD or Import Users via ".csv" & ".json" .
• with working Front/Backend via NPM to modify configurations and execute the script via the UI.
• add "single-user" option for private (or small business) use aswell