simon-dreher.de

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.

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How to ease the life of security researchers and improve your security with a simple text file.

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IPv6 is cool. The coolest animal is of course the penguin. So why not combine those two and explain the SLAAC protocol with penguins?

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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.

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Overview of several lesser known cryptographic features of git and their advantages.

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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.

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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.

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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.

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Bericht über mein neues Jolla-Phone und Sailfish OS.

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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.

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Description of my setup of seafile instances and some little hints.

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Instructions to run an instance of the OpenStreetMap rendering server alaCarte.

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In this article I describe how to use ansible to easily set up a mailserver.

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