https://www.ffoerg.de/ Personal blog sharing tech tips and tricks en-us https://ffoerg.de/posts/2026-02-21.shtml https://ffoerg.de/posts/2026-02-21.shtml 21 February 2026 00:00 UT Building open source software to bring Moxie Marlinspike's end-to-end encrypted AI chat service Confer to Linux with TPM-backed passkeys. https://ffoerg.de/posts/2026-02-07.shtml https://ffoerg.de/posts/2026-02-07.shtml 07 February 2026 00:00 UT Sandboxing password managers like KeePassXC with Firejail removes network access and restricts system permissions, protecting your credentials even if the application is compromised, while preserving essential functionality like SSH agent integration. https://ffoerg.de/posts/2026-01-25.shtml https://ffoerg.de/posts/2026-01-25.shtml 25 January 2026 00:00 UT Run Tailscale in a containerized environment to build secure, private networks for your applications and infrastructure https://ffoerg.de/posts/2026-01-17.shtml https://ffoerg.de/posts/2026-01-17.shtml 17 January 2026 00:00 UT Run dnscrypt-proxy for DNS over HTTP (DoH) and other encrypted DNS protocols in a containerized environment https://ffoerg.de/posts/2026-01-11.shtml https://ffoerg.de/posts/2026-01-11.shtml 11 January 2026 00:00 UT Discusses approaches for proxying applications that lack native SOCKS support through a SOCKS server https://ffoerg.de/posts/2026-01-05.shtml https://ffoerg.de/posts/2026-01-05.shtml 05 January 2026 00:00 UT Run a SOCKS proxy for the Tor onion network in a containerized environment, achieving anonymous internet access https://ffoerg.de/posts/2026-01-04.shtml https://ffoerg.de/posts/2026-01-04.shtml 04 January 2026 00:00 UT Run an OpenSSH client as a SOCKS proxy server in a Docker or Podman container to establish secure network tunnels without installing SSH directly on your host system https://ffoerg.de/posts/2025-11-23.shtml https://ffoerg.de/posts/2025-11-23.shtml 23 November 2025 00:00 UT A feature adding support for Poe AI models has been contributed to the Roo Code VSCode plugin, enabling enhanced coding assistance through AI agents https://ffoerg.de/posts/2025-09-14.shtml https://ffoerg.de/posts/2025-09-14.shtml 14 September 2025 00:00 UT Edi is a straightforward Command Line Interface (CLI) tool designed for seamless interaction with the Poe API https://ffoerg.de/posts/2025-08-03.shtml https://ffoerg.de/posts/2025-08-03.shtml 03 August 2025 00:00 UT The problem we are addressing is how to derive the formula for the sum of the first n integers raised to an arbitrary but fixed power https://ffoerg.de/posts/2025-06-07.shtml https://ffoerg.de/posts/2025-06-07.shtml 07 June 2025 00:00 UT Schedule color temperature changes for your monitors using xsct and cron on Linux for better sleep https://ffoerg.de/posts/2025-05-10.shtml https://ffoerg.de/posts/2025-05-10.shtml 10 May 2025 00:00 UT Reviewing the Chromecast with Google TV as a retro gaming console for emulating SNES and other consoles https://ffoerg.de/posts/2025-05-04.shtml https://ffoerg.de/posts/2025-05-04.shtml 04 May 2025 00:00 UT Simple explanation of the Monty Hall Problem through simulation https://ffoerg.de/posts/2024-01-28.shtml https://ffoerg.de/posts/2024-01-28.shtml 28 January 2024 00:00 UT Configure dnscrypt-proxy on a Pi-hole running on Raspberry Pi OS for encrypted DNS via DNS-Over-HTTPS (DoH) https://ffoerg.de/posts/2023-07-22.shtml https://ffoerg.de/posts/2023-07-22.shtml 22 July 2023 00:00 UT SSH-Weak-DH tool now detects SSH servers offering a Diffie-Hellman modulus that is not a safe prime https://ffoerg.de/posts/2021-04-25.shtml https://ffoerg.de/posts/2021-04-25.shtml 25 April 2021 00:00 UT Switch monitor inputs and change display settings whenever the computer wakes up or goes to sleep https://ffoerg.de/posts/2021-04-24.shtml https://ffoerg.de/posts/2021-04-24.shtml 24 April 2021 00:00 UT Change the playback speed in the Spotify web player via a Chrome extension https://ffoerg.de/posts/2021-03-28.shtml https://ffoerg.de/posts/2021-03-28.shtml 28 March 2021 00:00 UT Two approaches for solving the Hollywood challenge of the Microcorruption CTF https://ffoerg.de/posts/2020-07-02.shtml https://ffoerg.de/posts/2020-07-02.shtml 02 July 2020 00:00 UT Tweaking font rendering on macOS on HiDPI monitors and lower resolution screens https://ffoerg.de/posts/2020-05-30.shtml https://ffoerg.de/posts/2020-05-30.shtml 30 May 2020 00:00 UT Tools for the Video Disk Recorder (VDR) that allow one to watch digital TV, record and edit streams, and burn them on DVD, provided that the user has a digital TV tuner card https://ffoerg.de/posts/2020-05-08.shtml https://ffoerg.de/posts/2020-05-08.shtml 08 May 2020 00:00 UT Crashes of Spotify iOS app triggered by bug in Facebook's SDK appear to affect Spotify's web player https://ffoerg.de/posts/2020-04-27.shtml https://ffoerg.de/posts/2020-04-27.shtml 27 Apr 2020 00:00 UT Malicious behavior of forward proxies for HTTP and HTTPS with examples and a brief discussion of VPNs as an alternative https://ffoerg.de/posts/2020-04-25.shtml https://ffoerg.de/posts/2020-04-25.shtml 25 Apr 2020 00:00 UT Benefits of reading bright text on a dark background for myopia https://ffoerg.de/posts/2020-04-23.shtml https://ffoerg.de/posts/2020-04-23.shtml 23 Apr 2020 00:00 UT Getting an USB 3.0 to Gigabit Ethernet Adapter with the Realtek 8153 Chipset working on macOS Catalina 10.15.4 https://ffoerg.de/posts/2020-04-19.shtml https://ffoerg.de/posts/2020-04-19.shtml 19 Apr 2020 00:00 UT Backing up emails on the command-line using OfflineIMAP with sample configurations for Outlook and Gmail https://ffoerg.de/posts/2020-04-18.shtml https://ffoerg.de/posts/2020-04-18.shtml 18 Apr 2020 00:00 UT Setting up a Raspberry Pi with an Edimax EW-7811Un wireless dongle as a wireless access point https://ffoerg.de/posts/2017-12-11.shtml https://ffoerg.de/posts/2017-12-11.shtml 11 Dec 2017 00:00 UT How to access a filesystem (which your operating system cannot read) inside a virtual machine https://ffoerg.de/posts/2016-11-23.shtml https://ffoerg.de/posts/2016-11-23.shtml 23 Nov 2016 00:00 UT How clipboards work and their benefits https://ffoerg.de/posts/2016-07-02.shtml https://ffoerg.de/posts/2016-07-02.shtml 02 Jul 2016 00:00 UT Provides scripts for configuring multiple screens using xrandr https://ffoerg.de/posts/2016-06-29.shtml https://ffoerg.de/posts/2016-06-29.shtml 29 Jun 2016 00:00 UT How to backup your email using thunderbird and how to migrate your email to a different email provider https://ffoerg.de/posts/2016-02-08.shtml https://ffoerg.de/posts/2016-02-08.shtml 08 Feb 2016 00:00 UT Automatically redirect connection to the target SSH server through an SSH proxy if the target cannot be reached directly https://ffoerg.de/posts/2015-11-25.shtml https://ffoerg.de/posts/2015-11-25.shtml 25 Nov 2015 00:00 UT C code that sets the monitor color temperature using X server API https://ffoerg.de/posts/2015-10-10.shtml https://ffoerg.de/posts/2015-10-10.shtml 10 Oct 2015 00:00 UT Explains different completion methods in Vim and discusses autocompletion plugins https://ffoerg.de/posts/2015-09-26.shtml https://ffoerg.de/posts/2015-09-26.shtml 26 Sep 2015 00:00 UT Approach to fuzz the ARM mbed TLS library https://ffoerg.de/posts/2015-08-12.shtml https://ffoerg.de/posts/2015-08-12.shtml 12 Aug 2015 00:00 UT Tool to check whether SSH server enables weak Diffie-Hellman groups https://ffoerg.de/posts/2015-01-25.shtml https://ffoerg.de/posts/2015-01-25.shtml 25 Jan 2015 00:00 UT How to build a standing desk from IKEA and the Home Depot parts for about 50 USD https://ffoerg.de/posts/2014-12-23.shtml https://ffoerg.de/posts/2014-12-23.shtml 23 Dec 2014 00:00 UT How to configure high-DPI displays under Linux https://ffoerg.de/posts/2014-06-15.shtml https://ffoerg.de/posts/2014-06-15.shtml 15 Jun 2014 00:00 UT Troubleshoot slow Wi-Fi issues on the Raspberry Pi https://ffoerg.de/posts/2014-06-14.shtml https://ffoerg.de/posts/2014-06-14.shtml 14 Jun 2014 00:00 UT How to install and configure XBMC (now Kodi) on the Raspberry Pi https://ffoerg.de/posts/2014-06-12.shtml https://ffoerg.de/posts/2014-06-12.shtml 12 Jun 2014 00:00 UT How to emulate console games using the Raspberry Pi https://ffoerg.de/posts/2014-03-23.shtml https://ffoerg.de/posts/2014-03-23.shtml 23 Mar 2014 00:00 UT How to back up files from a system using ZFS as its file system to external hard drives that are formatted with ZFS https://ffoerg.de/posts/2014-02-21.shtml https://ffoerg.de/posts/2014-02-21.shtml 21 Feb 2014 00:00 UT Display Input/Output statistics of a Linux process https://ffoerg.de/posts/2014-02-09.shtml https://ffoerg.de/posts/2014-02-09.shtml 09 Feb 2014 00:00 UT Determine which wireless network channels are used https://ffoerg.de/posts/2013-08-17.shtml https://ffoerg.de/posts/2013-08-17.shtml 17 Aug 2013 00:00 UT Keeping the web server file directory as a git repository https://ffoerg.de/posts/2013-08-16.shtml https://ffoerg.de/posts/2013-08-16.shtml 16 Aug 2013 00:00 UT Simple scripts for setting up a web server that serves all files in a specified directory https://ffoerg.de/posts/2013-06-16.shtml https://ffoerg.de/posts/2013-06-16.shtml 16 Jun 2013 00:00 UT How to protect your SSH private keys https://ffoerg.de/posts/2013-06-14.shtml https://ffoerg.de/posts/2013-06-14.shtml 14 Jun 2013 00:00 UT Forward secrecy for HTTPS using ephemeral Diffie-Hellman https://ffoerg.de/posts/2013-06-13.shtml https://ffoerg.de/posts/2013-06-13.shtml 13 Jun 2013 00:00 UT Discusses a Chrome Extension that renders Markdown (.md)