Renewing certificates - a horrible hack

I’m hosting my own mailserver to receive mail for the domains i own. My personal mail is running somewhere else. It’s the last public server i’m operating out there for my own purposes and it’s more for training purposes. Most of the por...

Solaris 11: Network Condition Simulator

A long time ago i wrote about a driver for Opensolaris called hitbox or htbx. This driver enabled a Solaris system to simulate properties of a network link like propagation delays and packet drops. This must have been 15 years and more ...

Solaris 10/11: Account locking and passwordless SSH

One of the nice things about SSH is passwordless login. However that doesn’t mean that passwords can’t ruin your day. Let’s assume you have an account on a system you exclusively use with passwordless SSH. And it works flawlessly. Until ...

A WLAN tunneled

From time to time it’s quite useful to appear to be an internet user for example from the US instead of Germany. Or in the UK. Of course there are services for this. I won’t mention a specific one, because it’s impossible to watch Youtu...

Migrating from Ubiquiti USG to UCG

I gave myself a christmas present this year. I’m using a Ubiquiti Unifi Security Gateway (short USG) for quite some time now and i thought it would be a good idea to update this device, in order to use IDS/IPS on my 1 GBit/s connection. ...

2024

Vorwort - im Nachhinein … Es ist der 1.1.2025. Das neue Jahr ist da. Ich habe mehr als in den letzten beiden Jahren den Text noch nachbearbeitet, weil mir erst nach der Veröffentlichung Gedanken in den Sinn kamen: “Eigentlich muss das au...

Berlin

Ich frage mich bis heute an vielen Stellen, wie mein Gehirn verschaltet ist. Okay, fragen sich wahrscheinlich mehr Menschen, die mich kennen. Vermutlich mit Recht und das auch nicht erst seit gestern. Aber ich meine jetzt was anderes: Wa...