Playing with wifi (I)

A few weeks ago I bought a wifi antenna for my laptop, an Alpha AWUS036NHA. My purpose was to  start playing with Kali and I thought a first natural step is to learn how to use its tools for network traffic interception. Also, I wanted to show a lesson to people at my work who don’t think HTTPS is necessary… let’s see what comes out!

1st step – the controller:

Let’s see what I bought: after looking at some websites I saw that, in order to mess with wifi without restrictions, I required a controller with Kali-compatible firmware (of course!) and which allowed me to work in monitor mode – that is, listening to all the wifi traffic without having to associate with any network – and packet injection – which consists on sending packets while in monitor mode – .

My controller uses an Atheros AR9271 chipset that meets the requirements. It also has a 2.4GHz, 5dBi antenna receiver that could at some point be upgraded to 9dBi. Since I want it to play with local routers, this will work by now.