The first thing we are going to do is install BackTrack 3 onto an SD card so we can boot from the SD card without having to mess up our currently installed OS. I am not going to go into the details of how to do that here, as it is readily available all over the internet. Here is the article I followed. Apparently the article which I followed has been taken down, but a quick google search should find another.
After you have booted into BackTrack 3, we are ready for the fun part. The first thing we will do is shutdown our wifi card. In the terminal:
ifconfig ath0 down
Next we want to bring it back up, but in monitor mode:
airmon-ng start wifi0
You should see that a new interface called ath1 was created. That is the interface we are going to use for the rest of our cracking. Next:
airodump-ng ath1
This will list all of the wifi signals your card is picking up. There are two things you are going to want to write down: the BSSID and the Channel (CH), and also make sure the Encryption (ENC) is WEP. Or, if you don’t want to write thpre down, just open a new shell and leave that one open.
Now press
ctrl+c
to stop airodump-ng. Open a new console (if you haven’t already) and type:
Read more »