Enabling Monitor mode in Intel 5100

If you are interested in carrying out Wireless LAN Penetration testing, this is something you must be interested in.If you really need to sniff the data which is not meant for your wireless LAN.

Fortunately the ubuntu driver "iwlagn" comes with the feature ;) enabled.

My wireless config :-
But if you use the command "sudo iwconfig wlan0 mode monitor" its throwing up and error
"Error for wireless request "Set Mode" (8B06) :
SET failed on device wlan0 ; Device or resource busy."

After playing around a bit I figured out that this was due to the fact that I was associated with my wireless network. Once i disconnected, the command worked and i was able to sniff the wireless in Monitor mode.

A small video of WPA hack: