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.
Once the installation process is complete,
the tool can easily get started finding the trespasser. At the top of
the app’s main page, you will see the name of your network as well as a
refresh and the settings menu buttons.
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 information from your connected
devices. Write down your MAC address (or your MAC addresses, 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.
Also try this :: Find Hidden Wireless in Android
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