Category Archives: IT

DDOS protection

Did you ever wondered what cloudflare [1] is? It is basically an protection against Distributed Denial of Service attack [2], where your server is attacked via a massive flood of incoming traffic, trying to overload your server. But there is an easy and cost saving way to protect your server – of course if you… Read More »

Cryptocurrencies – Gamblers and Game Changers

There is currently a big hype around cryptocurrencies and a kind of battle between Bitcoin and all the Altcoins (alternative Coins). Bitcoin seems to have the first-mover advantage, as techologically, it is lacking behind a majority of other coins. Bitcoin created a brand and this is rewarded with an explosive up-drift in their exchange rate.… Read More »

Ethereum, Ethereum Classic & Expanse: Basics about Mining and Mining Pools

In advance, I would like to highlight, that this article will focus on the mining of the following 3 Ethash (previously known as Dagger-Hashimoto) algorithm based  cryptocurrencies: Ethereum Ethereum Classic Expanse Basics about Mining Basically each minable cryptocurrency can be mined solo (stand-alone), with GPU and/or CPU power. CPU mining is not to be considered efficient… Read More »

Windows 10 and SSD ending up in disk error

To speed up my PC, I decided to buy & install a SSD hard disc. As I have a Windows 10 with plenty of applications and data running I thought about a migration via a disc clone. Therefore, I first cleaned up my “old” hard disc. I de-installed software I haven’t used for years and… Read More »

Howto start with Bitcoin

Within the last months I have heard a lot about Bitcoin. So I thought to get a bit into this topic. According to Wikipedia [1] it is a decentralized cryptocurrency. The main advantages are basically that the currency is managed decentral, meaning that there are basically no banks required to do any transaction. In addition… Read More »

Howto make a bootable USB stick on OS X

Recently I updated my Windows PC (which I only use for gaming purpose of course) and managed to screw it. Once I did the planned restart it showed me “No operating system found”. Since I upgraded from Windows 7 to Windows 10 via the update manager I also did not had a Windows 10 image… Read More »

MacOS Yosemite: Apps still in Launchpad after removal

Recently I have removed some apps from my Macbook Air, as I’ve noticed that is definitely not a gaming PC. In concrete I am talking about Steam, the Gaming Platform and two games. Neither the Mac Book Air is designed for games, nor the small SSD can handle too much data. So what I did… Read More »

Back online after disaster recovery

Recently I tried to upgrade my Ubuntu server from 10.04 to 14.04 – but I ended up in a big chaos. My my case chaos is defined by a non-working server, where actually most of the standard Linux commands has gone, and an upgrade/downgrade was not possible anymore. After long back and forth, I decided… Read More »

Category: 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 »