Business

Documentation for a successful evagelism

21/09/2008

Forgetting the fact that rms can be a complicated person, I admire him for various reasons, he was capable of bringing together with his ideas, a revolution. It was impossible to measure what his actions was capable of back then, but even though he worked hard to achieve his objectives. He acted small, starting with one step, but thinking big, knew he needed many parts to create a completely free operating system, a text editor, compiler, shell, documentation tool, kernel and much more. Creating all of this would take a bunch of time and people to help, that’s where documentation…

Mobile Hotspot – Wi-Fi in your car, bus, taxi cab, …

04/09/2008

Today we launched our first pilot of the VexBox Mobile Hotspot solution. It’s our linux distribution with a new hardware that can take the internet from 3.5G, 3G, EDGE or GPRS, whatever is available and faster. It can be used in places where fiber doesn’t reach or buses, taxi cabs, cars, … It’s been months doing reverse engineering to understand how the hardware works, also writing the device drivers for a chip that is not perfectly designed and well, we made it! October 1st is the official launch date. Congratulations for all the team, I know you all worked very…

What actually 802.11r do?

04/09/2008

After 4 years of hard working, IEEE approved the standard 802.11r, which handles a fast BSS transition. What this means? A big wireless network, is built with a lot of access points, this means that if you would like to cover a big city, you might have thousands of access points spreaded around. This brought a new challenge to 802.11, with the introduction of applications such as voip, the transition between access points needs a very small delay, you would be amazing how annoying is to have a delay bigger then 300ms, can turn your call into something unacceptable if…

How to NOT apply for a job

28/08/2008

Two days ago I posted a job opportunity in one of those sites where engineers and computer professionals watch often, I described the company and the profile I was looking for very carefully, in the end of the profile I made one simple request: Include your salary expectation I did it in the late evening and early in the morning it was already appearing in the website and I already received a bunch of applications. Checking one by one, I noted that most of the applications didn’t do the simple request, like usual. How experienced people don’t realize this can…

Hacking commercial wireless

26/08/2008

Lately a number of blogs posted comments on a very old post, dated 2006 about how to hack a commercial wireless, goes like this: “I continued to try a couple other things, like checking if they eventually forgot some ports like 21 (ftp) or 110 (pop3). But no, all of them were properly blocked. After a lot of unsuccesfull attempts, I had some intuition telling me to check how they handle pictures. Without any hope of success I typed http://www.google.com/.jpg into my browser’s adress bar, and to my big surprise I saw the page you see when you follow the…

Páginas
<
1
...
8
9
10
...
18
>