Homelab · Companies · Politics

Blog

Notes on self-hosting, running companies, and the occasional take on politics — written down as I go.

July 9, 2026

How an empty firewall file bricked my whole network

A deploy pipeline run from the wrong directory truncated my OpenWrt firewall config to 0 bytes. Postmortem: symptoms, red herrings, recovery, lessons.

July 9, 2026

What I do with each company

A tour of the five ventures I build and run: IT consulting, EU-sovereign hosting, a privacy-first health app, app development, and chemistry software.

July 9, 2026

Who I am

Anton Anders is a developer and founder from the greater Leipzig area. He builds companies, runs a homelab, and writes about self-hosting and sovereignty.

July 9, 2026

Why another tech blog

Why I started this site: practitioner notes from running real infrastructure and real companies, self-hosted, with no tracking and some opinions.

December 12, 2021

Log4j exploit weekend fun

How I spent the Log4Shell weekend: auditing every service and server my company runs, patching Jitsi and Unifi, and what made the audit quick.

December 5, 2021

Enabling Valhalla routing to use pedestrian areas

Valhalla refuses to route pedestrians across OSM pedestrian areas. Why that happens in graph.lua, and a workaround that routes along the polygon edges.