How to Kill Wi-Fi : Disable Internet Connection from Any Devices on Wi-Fi Network

I find these type of internet user as annoying; those who torrent 24/7, sucking all the internet speed for himself and those who comes to your house and use internet for free yet they overly used the internet as if they are paying for the bills.
By using this method you can easily kill wifi connection from any device that is connected to the same network.

Method 1 : Netcut for Windows

Netcut is a free software for Windows XP, Vista and 7 that can protect your computer from ARP Spoofing (wiki).
Using this software, you can easily kill any device from connecting to wifi and disable it’s internet connection. Just click on the computer’s name and then click on “Cut off (Ready)” to kill the device’s wifi connection.
This software relies on Airpcap for capturing and analyzing wireless packets.
Download Netcut
Method 2 : Wifikill for Android

Wifikill is an Android app that functions very much the same as Netcut, it lets you to disable any device from connecting to Wi-Fi Network.
This app require rooted Android phone.
Last time I checked Wifikill is available on Market but it seems it has been removed now. You may want to try installing using apk file below:
WifiKill 1.7 for Android apk

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Using this two method, you can now remove any annoying internet user from leeching your internet connection and suck up the bandwidth. Serve them right, huh?
Tips: There are ways to prevent Netcut, google it

How to detect who is stealing your wireless internet wifi connection

Wireless Network Watcher is a portable tool from NirSoft Freeware that can be used to display the devices that are currently connected to your wireless internet wifi connection. This tool will display IP Address, device name, MAC Address, Network Adapter and also the device information.
If you are using this tool and detected unknown devices are connected to your wifi,  you can banned or blacklist the device’s MAC Address in your router and change the IP Address to force them not to try stealing your wifi connection again.


If your PC has more than 1 network adapter, you can change the advanced options and select which network adapter that you are using to connect to the internet.
Download Wireless Network Watcher

Zamzom Wireless Network also provide similar functionalities, in which you can scan and detect the devices currently connected to your wifi connection.
Download Zamzom Wireless Network.

If you are just wanted to know which device are connected to the network without any third party tools, good old net view /all commands works fine.
Download Wireless Network Watcher

sumber : http://eins.my/how-to-detect-who-is-stealing-your-wireless-internet-wifi-connection/