Category Archives: IT

Block SSH Brute Force Attacks

I already advised in one of my previous post [1] to disable the root log-in on your Linux host. Neither the less, sometimes – somebody will try to attack you with an SSH Brute Force Attack. For those who are not familiar with brute force attacks, these are attacks, where all possible passwords are tested [2].… Read More »

Windows 10 – Tech Preview – Test

Before I go into the details of my testing report, I have to say honestly that I personally do not like Windows that much. I am a friend of Unix-like derivates, where you easily can trace log files, enter some magic commands and where a reboot is seldom needed. Neither the less I am open… Read More »

Server Migration Guide

I’ve recently did a hardware migration for a 24/5 trading system. After a successful go-live and one week without any major incidents, I  think it would be a good topic to share. Beside the standard things (e.g. project management related topics) you have to do I would like to sum up some points which might me… Read More »

OS X 10.10 – Yosemite Beta 4

I have just downloaded the OS X 10.10 – Yosemite Beta 4, and at first sight most of my reported issues seems to be gone by now. Still a bit questionable is the information provided with the update. Once again  – 850 MB update with the information “recommended for all users” is a bit too… Read More »

OS X 10.10 Yosemite – Testing Part 2

Following my testing of OS X 10.10 Yosemite [1], today I have downloaded the following two updates from Apple for the Mac OS X 10.10 Yosemite: OS X Yosemite Developer Preview 7 OS X Beta Recovery Update First of all it would be helpful to provide some more details in regards to the context of the… Read More »

How to stop a failed FileVault encryption (at least partly)

With the upgrade to the second public beta version of OS X 10.10 Yosemite [1], I took the decision to enable FileVault to encrypt my disk. Setting the checkbox on the installation didn’t ring any bell in my head, so I went forward without thinking what such a simple click might do. Who needs backups? Who… Read More »

OS X 10.10 Yosemite – Testing Part 1

Believe it or not, I have a Mac and yes, I am using it with OS X, even if its seem that I am Linux addicted. So having that said I would like to provide you some information regarding my tests of the new MacOS 10.10 Yosemite. First of all to test it, I’ve acquired a… Read More »

Howto get BOINC running on a Linux Server

I’ve always been a fan of scientific projects, I’d also like to support and help. For a long time I am a supporter of the Seti@home project. Therefore I will set-up my server to do some processing, since it is idling most of the time. So let us install the boinc client first. Under Ubuntu… Read More »

Howto set-up your own cloud with Seafile

Based on all the NSA sniffing and the recent article about who provides whom which information [1] I decided to set-up my own cloud on my private server. And actually – it was surprisingly easy! Searching around the internet seafile [2] seemed to be the most appropriate solution, since it is open-source, provides a nice… Read More »

Basic security for Linux hosts

After reading Cuckoo’s egg from Clifford Stoll [1] I got a bit unsure if my Linux server is basically set-up secure enough. Even if the story about the hacker is quite old, it is neither the less highlighting the importance for security and to be careful enough when connecting a machine to the net. Additionally… Read More »