How to see who’s stealing your WiFi and how to block them on Android (2014-03-29 17:28) - Prophet Hacker

Have you ever wondered why your internet connection is being so laggy?
This is probably a good time to get suspicious of your neighbours who
might be using your WiFi network without your permission. Yes, you
can set up a password, however there are ways to bypass this. So what
should you do to block an intruder who is infiltrating your connection?
 The answer is simple: with a smartphone! Today we will tell you how
it is done. Like almost everything to do with Android, you can find out
 who has been sneaking some of your WiFi with an application. There
 is a free network tool which you can download right from the the Google
 Play Store called Fing. The first thing you have to do is connect to your
 smartphone or tablet to the WiFi network you want you want to test. Now
 simply download the application, which you can do by pressing the
install button below.
Tap on the refresh button update and the application will show what
 devices are connected to your WiFi network, specifying whether the router is a smartphone or a computer. There are many other options in Fing, like sending reports,
 checking open TCP ports and the list goes on. Perhaps one of its best
 advantages is that users can change the viewed IP name, which allows
 the user to know who they are on the app and who the infiltrators are.
 Once you know who the trespassers are, simply click on the intruder
and above you will see an option to ’enter a name ’. Enter a new name
 for that IP address, like WiFi thief for example. How to block unknown
 trespassing devices In the event that you’ve located a intruding device,
you are able to access the NAT and MAC information and connect to the router in order to block the unwanted guests from accessing WiFi in the future. On your computer
that connected to your router, enter your IP address into the browser.
It will ask you for the password and username on your router and if you
 haven’t changed it, it will be specified in the device. Now you’ll need
to authenticate. The home page of your router will appear, showing a
menu. Go to the security tab and enter a new password. (Remember, to connect to WiFi on your phone or your computer, you must enter this new password)
 If this isn’t enough, you can block access for other devices entirely.
 On the Fing application, you will see informationfromyourconnecteddevices. WritedownyourMACaddress(oryourMACaddresses,depending on
how many devices you have connected) on a piece of paper. Search
for the block devices option on the configuration page which you can
open on your computer. In Access Control area, you can filter the MAC
(one or more) that you’ve noted down. This will block any other
 invading addresses that try to infiltrate. Remember that if you choose
this option no one else will be able to connect to your WiFi without
having turned off the Access control option, which is good to keep in
 mind for friends or family who are visiting.