Author: ro

  • How to: Install Elastic Stack on Debian 11 Bullseye

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    Meta Last update: Sept 2022Tested with: Debian 11, Elastic Stack 8.4 1. Preparation This is my very personal configuration. All you really need is to have the sudo-package installed. Everything else is optional. 2. Elasticsearch You will get an output like: Start the Elasticsearch service and check if the service is running after a short…

  • Wie Meltdown funktioniert

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    Letztes Update: Aug 2020 1. Einleitung Unsere heutigen gewöhnlichen Computersysteme funktionieren nach dem Prinzip der sog. Von-Neumann-Architektur nach welcher es im Computer einen gemeinsamen Speicher gibt, der sowohl Programmbefehle als auch Daten hält. Mit Daten sind unsere gewöhnlichen Nutzdaten gemeint, die wir als Nutzer speichern und verarbeiten. Da sich dies nur in dem für den…

  • How to set up Postfix on Debian 11 to use a mailhoster with SMTP

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    Latest update: Aug 2022 Important notes Installation of packages Configuration of Postfix Configuration of password file Testing Troubleshooting

  • How to set up MSMTP on Debian to use a mailhoster with SMTP

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    Latest update: Jul 2022 Steps Note: mailutils is needed for sending mail via “mail” on the command line. Troubleshooting Credits

  • How to: Migrate some specific app profiles on macOS

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    Meta Latest update: Nov 2021Tested with: macOS Big Sur, macOS Monterey If you migrate from one machine to another make sure you follow those steps and you’ll get rewarded with a hassle-free migration. Get a pendrive and copy the following files as zipped packages: Google Chrome File type Path and notes main app /Applications/Google Chrome.app…

  • How to: Monitor network traffic from a device (mobile phone, tablet, notebook)

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    Meta Last update: Feb 2021Tested on: Ubuntu 20.04 Foreword In this tutorial we will use a regular computer with two USB wifi adapters: one for the connection to our internet/wan and the other one for creating our local wifi hotspot. You can substitute one of the wifi adapters with an ethernet adapter of course. I’m…

  • How to build a more secure personal computer

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    Latest update: Jan 2021 This guide is based on the BIOS UEFI replacement called Coreboot which runs on an ASUS F2A85-M or F2A85-M PRO mainboard with an AMD A10-5800K CPU with integrated graphics. 1. Introduction and aim This initial idea came up with the uprising problems and vulnerabilities of Intel ME and AMD Secure Technology (PSP). After having…

  • System alternatives without Intel ME / iAMT and AMD PSP / Secure Technology

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    Last update: Jan 2021 Due to a lack of documentation and possiblities to deactivate these “secure execution environments” those can’t be disabled on our own. If you are interested you can read some more details about Intel ME/iAMT and AMD Platform Secure Processor / AMD Secure Technology. This article is providing an overview about possible solutions. From today’s…

  • How to: Install a privacy friendly Jitsi Meet on Ubuntu and run it securely

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    Meta Last update: Jan 2021Tested with: Ubuntu 21.04 and 18.04 Prerequisites If you intend to run Jitsi on your new publicly accessible server, reachable under meet.yourdomain.com, you should change the name of your host accordingly in both files and reboot your machine: These instructions also take care of the TLS certificate. If the server is…