Robert Penz Blog

As in the last days many CA’s revoked certificates because not getting hacked, but the written policy did not match 100% the certificates.

If your container storage (like /var/lib/containers/storage/overlay or ~/.local/share/containers/storage/) is unexpectedly full and podman system prune doesn’t clear enough space, there is a simple “nuke” command built into Podman: podman system reset (Use

Ran into a legacy S10/125 fiber line and wondering if it will play nicely with standard E9/125 patch cables?

Vikunja is a fantastic self-hosted to-do and task management app.

When you set up a filtering DNS server—whether it’s a self-hosted Pi-hole, AdGuard Home, or a secure upstream provider like Cloudflare Families or NextDNS—you quickly run into a frustrating problem: smart clients bypass it.

If you’ve ever configured custom static routes on your router via DHCP, you might have run into a baffling issue: some devices pick up the new route perfectly, but suddenly lose their connection to the internet entirely.

It’s been over a decade since I first poked around the serial interface of my Stiebel Eltron LWZ 403 SOL.

As a fast workaround, a friend of mine made a modsecurity rule to filter CVE-2021-44228/LogJam/Log4Shell, which he allowed me to share with you.

You surely heard of the LogJam / Log4Shell / CVE-2021-44228 – if not, take a look at this blog post.

I just did an apt update / upgrade of a Debian 10 container and restarted it afterwards and got following: # pct start 105 Job for pve-container@105.service failed because the control process exited with error code.