koko's corner of the IT universe

So, imagine that you need to share a document or just a few words, with someone really fast, easy and secure, without worrying that someone will read it… And imagine that it’s really important to do it in the next 15 mintues. Then let me introduce you to http://otr.to – a state of art, highly secure, […]

In order to be a successful systems engineer you need to know your infrastructure very well. There are plenty of tools nowadays, which will help you monitor and maintain your systems internally. However, in order to be sure that you provide maximum availability of your product, you need to see it as your customers. That’s […]

Recently, my beloved Lenovo Vibe Z’s screen died (not the original one, but the replacement that I bought after I broke my screen) and I decided it’s time to move on. As an IT guy I really like fast devices with Android. The Vibe Z was a perfect fit for me, because it has 2 […]

Hey folks, Today I’m going to review a few of my favorite tools that I use every day, and in my opinion these can be classified as must have for a regular daily work of a system administrator. All the software that we are going to look at this article is for Windows. mRemoteNG

here’s a lot of noise around the new Samsung phone – Galaxy S6 and their “edge” model. There are no two oppinions that the Galaxy series of Samsung are probably the Android phone with the most pieces sold in the world and there’s probably a reason for that. But I won’t talk about this or how […]

The art of Hacking nowadays
October 28, 2014

Hello folks, Me and my colleagues participated at a conferrence last weekend – to be accurate the date was 25.10.2014. The picture I’m sharing with you is part of the first talk – which started approximately at 9:30 a.m. which was a good start of the day, and a good lesson too!     Let’s leave […]

Haproxy is a loadbalancer, relatively easy to configure and administer . To not wonder like me why 4 apaches fail on  1000 users , I advise you to pay attention to the loadbalancer configuration and in particular ip_conntrack.   What is ip_conntrac? Kernel module that handles the tracking of the connection.

Apache load balancing by source IP
September 27, 2013

As you may already know Apache doesn’t do loadbalancing based on source ip. This gets a very big deal, when you use apache as a proxy for some application servers, which need sticky session, otherwise something gets wrong. So a colleague of mine came across with a nice solution, based on what ends your IP […]

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XenApp won’t install or uninstall
September 29, 2012

Hello, Here’s something pretty fresh – just from last night. One of our Citrix servers got screwed and we wanted to do a clean install of XenApp. It’s 64 bits Windows 2008 R2 server and we wanted to uninstall the XenApp application. However, the XenApp doesn’t thought so! When I tried to remove the application […]