With large providers such as Google and Yahoo looking more into DMARC, this article explains some background and how to set up DKIM and DMARC with Postfix.
read moreKindle as information dashboard
How to build an info screen that you can hang into your home by upcycling an old Kindle. All data gathering, image generation and showing the image are done in a single Go binary running on the Kindle itself. Featuring a cute penguin that shows the weather.
read more- Mon 01 January 2024
- Simon Dreher
- DIY
- Tags: linux, iot, penguins
security.txt
How to ease the life of security researchers and improve your security with a simple text file.
read more- Sun 10 April 2022
- Simon Dreher
- Linux
- Tags: security, server
IPv6 Stateless Address Autoconfiguration (SLAAC) explained using penguins
IPv6 is cool. The coolest animal is of course the penguin. So why not combine those two and explain the SLAAC protocol with penguins?
read morePassword management on Linux
A simple solution to store your passwords securly in such a way that they can be used in multiple programs and machines and also be shared with other people.
read more- Sun 10 February 2019
- Simon Dreher
- Linux
- Tags: linux, security, password
Cryptographically securing git operations
Overview of several lesser known cryptographic features of git and their advantages.
read more- Mon 28 August 2017
- Simon Dreher
- Linux
- Tags: crypto, git, security
IoT-LED-Leuchte
Nachdem das Internet-of-Things der neue Hype ist und selbst Hacker es für ihre DDoS-Attacken entdeckt haben, ist es Zeit auch etwas aus meinem Haushalt ins Internet zu hängen. Darum hier also eine Anleitung zum Bau einer Leuchte mit RGB-LEDs und dem ESP8266, die über das lokale Netzwerk mit MQTT gesteuert werden kann.
read moreLilypond
Mit dem Programm lilypond können Noten in Textform eingegeben werden und daraus ein optisch ansprechender Notensatz und midi-Dateien erstellt werden. Außerdem können mehrere Lieder in ein Dokument kombiniert werden.
read more- Sat 28 May 2016
- Simon Dreher
- Linux
- Tags: linux, music
Neue KIT Prüfungsordnung
In meinem Studiengang gibt es eine neue Studienordnung. Weil keiner Lust hat, beide Ordnungen zu vergleichen habe ich hier eine Auflistung der Unterschiede zusammengestellt.
read more- Mon 05 October 2015
- Simon Dreher
- Studium
- Tags: KIT, SPO, Informatik
Securing your server
After researching for the university I post my findings on the internet, too. I will show some tools you should definitely have on your server and some which are nice to have to improve the security of your server.
read more- Wed 10 June 2015
- Simon Dreher
- Linux
- Tags: server, security
Automatically backup fotos on Sailfish
Tutorial on automatically uploading fotos to a server when they're made on the Jolla using systemd and rsync. Can also be applied to other kind of files.
read more- Thu 09 October 2014
- Simon Dreher
- Linux
- Tags: jolla, sailfish, backup
100 Tage Jolla
Bericht über mein neues Jolla-Phone und Sailfish OS.
read more- Mon 29 September 2014
- Simon Dreher
- Linux
- Tags: linux, smartphone, jolla, sailfish
Color Management on Linux
Some instructions on using some color management on linux, especially covering display calibration with argyllcms and scanner calibration from the command line, all on linux with xfce.
read more- Sat 15 March 2014
- Simon Dreher
- Linux
- Tags: linux, graphics, color, management
Seafile
Description of my setup of seafile instances and some little hints.
read more- Sun 16 February 2014
- Simon Dreher
- Linux
- Tags: linux, server, sync
Quadrokopter
Sehr ausführliche Anleitung für den Bau eines Quadrokopters und nützliche Tipps, welche Fehler man vermeiden sollte.
read more- Mon 20 January 2014
- Simon Dreher
- DIY
- Tags: quadrokopter, soldering, nanowii, multiwii
alaCarte on Debian
Instructions to run an instance of the OpenStreetMap rendering server alaCarte.
read more- Thu 12 December 2013
- Simon Dreher
- Linux
- Tags: linux, alacarte, server
Mailserver
In this article I describe how to use ansible to easily set up a mailserver.
read moreTux - Stickmuster
Stickmuster um einen Tux-Aufnäher anzufertigen.
read more- Wed 03 April 2013
- Simon Dreher
- DIY
- Tags: tux, linux, handarbeit, sticken