Detect and kill intruders on my WiFi network

Increasingly, and especially in large cities, many people experience a Connection increasingly slow because of the intruders that «sneak» into your network Wifi and download all kinds of files by the piece.

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Most Wi-Fi networks are pretty weak when it comes to security. If the password lacks encryption, or has a weak one, it is easy for someone to take advantage of all your bandwidth.

We will try to collect a series of advice to remove intruders from our network and secure it to prevent further intrusions.

How to detect intruders in our Wi-Fi network?

First we will have to find out If we suffer these symptoms or the loss of speed, it is the fault of the infrastructure.

  1. Let’s turn off our devices and computers (or disconnect them from the network) and observe the router activity light. If it blinks continuously and quickly, someone is connected and controlling a considerable flow of information.
  2. With the help of a speedometer we will confirm the loss of bandwidth. We can do it with an online test like or a specific program like BASpeed.

Now we will try to find out how many incrusoes are connected and who are they.

One of the best known and classic applications (I say classic because it hasn’t been updated for years) is AirSnare, this application listens to the traffic going through the network adapter and gets all the MAC of the local network.

Another similar one is Zamzon Wireless Network Tool (simpler but just as effective).

And one of the effective ways is by accessing the router control panel, type your router’s IP into your browser ( or whatever), then enter the user and password (if you know it, it will be easy, if not, look for your device’s password in RouterPasswords or CIRT) although it is also possible that the intruder has changed it to prevent you from realizing it, in this case you will have to resort to resetting the router.

Once inside the panel look for something about connected clients or (wireless clients). It will be easy to find it since a table It will show you the IPs of the devices connected to the local network and MAC addresses, each console, PC, or mobile that you have connected will have its own.

It’s time to protect the network

We have already identified the intruders, now it’s time to really protect our network to prevent future intrusions.

Forget setting a WEP encryption, filter by MAC, hide the SSID or turn off the router, all these measures are not very effective (or useless) to avoid the classic Aircrack.

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We are going to list the measures that if they work really:

  • WPA/WPA2 encryption: This type of encryption is much stronger and the use of dictionaries is not so easy for many. Setting a variable length passphrase will be a robust measure.
  • Change the router password: It is the first thing you should do as soon as it reaches your hands.

And if you let opened You will be a generous person but I do not recommend it, since your connection may suffer too many losses and be used for illegal purposes.

And the way to prevent all this from being impossible

It’s easy and not as expensive as it seems wire up all your thing and turn off the router Wi-Fi, you will have a fast network and more stable than ever Wi-Fi thief proof.

I don’t think it’s that easy to sneak into your house, plug an RJ-45 into your router or switch, run the cable, and walk away.

And finally a little advice, even for thieves. «Stealing your neighbor’s Wi-Fi is not okay, not at all, it’s even a crime, but if you do it, at least use it to check a website from time to time because you have no other way but don’t burn the connection, It’s pretty despicable.»

And you, What measures do you take to protect your connection?


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