Pentesting and IT Security Blog

Our passion for testing and defending infrastructures, applications and companies often leads us to the point where we want to share our thoughts and experience with the world. Here you can read all about our exploits and research and enjoy our posts, from useful howtos, to published CVEs, management strategies, new exciting tools and much more. As a provider of offensive and defensive IT services, we always welcome readers to reach out to us and ask questions or provide feedback, be it about our blog or our services, which include web-application and network penetration tests, system defense and hardening and management consulting, among others.

Info-Mails für Unattended-Upgrades

date Fri Aug 30, 2019 category Defense How to... Sicherheit Schritt für Schritt
tags Security Howto Sicherheit Linux Ubuntu Debian Updates

Im Mai hatte ich zuletzt zum Thema automatische Updates für Linux Server geschrieben und einen zweiten Teil versprochen. Dieser kommt mit diesem Beitrag, wenn auch etwas verspätet. Wie sich Updates ohne manuelles zutun installieren lassen, wurde ja bereits geklärt. Doch was passiert, wenn ein solc...

Daten- und Festplattenverschlüsselung mit Veracrypt

date Sat May 04, 2019 category Defense
tags Security Crypto Howto Privacy Data Encryption

This post is only available in german. Freitag, 03. Mai 2019 09:49 Im April haben wir auf unserem Youtube Channel zwei Videos zu Veracrypt veröffentlicht. Darin wird gezeigt, wie mit Veracrypt sowohl gesammte Partitionen oder Festplatten, als auch Teilbereiche einer Festplatte als so genann...

Tagging emails sent in plain text with Thunderbird

date Wed Dec 09, 2015 category Defense
tags Mail STARTTLS TLS Security Client Awareness Howto Encryption

Now matter how much you want to secure your mail server, to be able to actually communicate with your customers and partners, you will have to face the ugly truth that enforcing STARTTLS might not be the best idea from a business perspective. Using opportunistic encryption, meaning to encrypt mail...

SSH public key verification with FingerprintHash

date Tue Nov 17, 2015 category Defense
tags Security Client Howto Access Crypto SSH

Whenever I'm connecting to a new remote server via SSH, I tend to verify the fingerprint to make sure that I'm actually connecting to my own machine. Usually it's not that big a deal as I'm simply comparing two strings, but what if those two strings are created with two different hashing algorithms?...

A First Look at Let's Encrypt Beta

date Mon Nov 16, 2015 category Defense
tags TLS Security Howto SSL

A few days ago, the TLS certificate (SSL is dead, remember?) of my private blog www.hashtagsecurity.com expired without me noticing it, mostly because I paused any activities there to focus on my work here at LastBreach as well as this blog. Since I didn't intend on working on hashtagsecurity.com...