Welcome to Larvitz Blog! I’m Christian, a Cloud Consultant by day and FreeBSD enthusiast by night, with over 20 years in enterprise IT. Here I write about FreeBSD jails, PF firewalling, self-hosting, Linux system administration, and anything that’s cleanly engineered. Most articles are hands-on guides born from running my own infrastructure, from dual-stack networking and Ansible automation to hosting a Mastodon instance on FreeBSD.

Have a question or want to discuss something? Find me on the Fediverse at @Larvitz@burningboard.net. I’m always happy to chat!

#consulting Articles

Wed 13 May 2026
Travel

A Field Manual for Three Years on Deutsche Bahn

After years of regular business travel by Deutsche Bahn, here is the small library of habits, app picks, routing folklore, and survival gear that actually helps. Not a complaint piece. A handbook for everyone who has resigned themselves to the system and would like the next trip to suck a little less.