Pentesting, System Hardening & 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.

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...

Internal encryption in company networks is important and something that's done relatively easy. By creating your own certificate authority (CA) and signing your server certificates with it, you can establish a centralized point of trust on all your devices, making it much more easy for you to mainta...

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 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...

This is a quick overview of a secure Apache2 configuration. We won’t be going into Linux hardening, but will focus instead on the basic configuration options of Apache2. The following code boxes show examples of a secure configuration. Please adjust them to your requirements and test each of them be...