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 moresecurity.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
Password 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
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