Ok,I’m quite sure that you guys have been playing around on some Backtrack 3 tools to start Cracking Wireless Access Point or Cracking WEP. By using Backtrack 3 , you’ll find a lot of tools related to Wireless Hacking or Wifi Hacking (to be more specific). And If you’ve been familiar with backtrack 3 wireless hacking tool , you must know the tool called Mdk3 ! What does Mdk3 actually do ? In this mdk3 tutorial article , I’ll be giving you a short preview and better understanding about mdk3.

Here’s what mdk3 actually does :

1. It can deauthenticate clients from all nearby or a selected Access Point thus providing a denial of service
2. It can flood the nearby APs with authentication requests. This can lead to a situation where some APs will need to be restarted or the become full and will not accept any new users
3. It can create a beacon flood of fake APs specifying some ssid or generating random ssid names
4. the legitimate clients that were booted from their APs in step 1 will have a lot of problems reconnecting

Here’s the command to run mkd3 from your backtrack 3 distro :
mdk3 eth0 d # deauthentication attack
mdk3 eth0 a -a # authentication flood
mdk3 eth0 b -n MyEssid -w -c 11 # beacon flood mode

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