There are more and more news in telecommunications but each time the speed of our connection is slower.unsolved mystery? No, it is a spy or a mole who has connected to our network and as there are more computers, resources are divided and therefore the connection usually slows down.
In general, identifying who is or is not connected to our Wi-Fi network is difficult and many choose to turn off the Wi-Fi connection or the router. But If we have Ubuntu, the process to identify the users of our Wi-Fi network is very easy and it is enough to install two programs through the terminal.
Installation of Nast and Nmap for our wifi network
The programs we use to identify the users of our Wi-Fi network are called nast and nmap. These will allow us to scan our network and return MAC addresses of the network. This is useful to us because in addition to knowing if there is someone else on our Wi-Fi network, it will allow us to take serious and harsh measures against usurpers of our network. By the way, the use of the resources of a Wi-Fi network without our consent is a crime in some countries.
Nast and nmap are in the official Ubuntu repositories, so just open the terminal and type the following:
sudo apt-get install nast nmap
Now we only need paper and pencil to take note of the addresses or the MAC address that is usurping our Wi-Fi network. To list the users that are present in our Wi-Fi network we will only have to write the following in the terminal:
sudo nast -m -i wlan0
This will show us all the computers connected to our Wi-Fi network, whether or not they are active. Now to know the assets we write the following:
sudo nast -g -i wlan0
If the MAC address appears the words "Yep!" the equipment is active and using our wifi network. If, on the contrary, the word "Bad!" Appears, the equipment is not in use or connected.
Conclusion
As you can see, the operation of these programs is simple and can help us to check in a short time whether or not we have intruders on our Wi-Fi network. In a future post we will show you solutions to get those annoying tenants out of our network. And all with Ubuntu.