Cover Image

Secure Messaging with Tox-Chat

March, 25. 2019f 2019 - Reading time: 6 minutes

I am increasingly distancing myself from technologies that permanently monitor and evaluate me and create behavioral profiles of me. My Android phone, which I'm not happy with either, has been freed from all kinds of trackers hidden in apps with Exodus privacy. I deleted my Windows 10 on the notebook without replacement and replaced it with the great Manjaro-Linux, because the built-in spy tools and the self-evident fact that Microsoft simply turns spying on during installation and later updates made me sick. But one thing remains: How can I chat with other people without being able to read everything I write or communicate with from central places? Read more

Cover Image

Wildcard Certificates with Letsencrypt and DNS Challenge

March, 25. 2019f 2019 - Reading time: 6 minutes

If you run several web applications on a web server, it is relatively annoying to keep separate processes running for each individual subdomain, which fetches the required SSL certificates in good time before the expiration date and carry out the verification process for each website.

For this reason, there are wildcard certificates, i.e. certificates that cover your own domain including all subdomains in one certificate. This certificate can then be stored centrally and used for all subdomains without further actions. I'll explain how to do that now. Read more

Cover Image

Secure Messengers

March, 25. 2019f 2019 - Reading time: 2 minutes

Have you already switched to a safer messenger or do you at least use one? Well, but what does "safe" actually mean? For your orientation, here is some information that shows all the technical features of distant messengers in a matrix.

Read more


The World in the Eyes of Mr. Doering.

Experiences, Mentions, Inspirations, Emotions and Experiences

Der deutsche Blog ist hier.