Wifi Jammer: A Complete Guide

5/10/2022

Security

A wifi jammer is a device that prevents wireless devices from accessing the Internet. It is used to disrupt communication in a particular area and to prevent people from using their phones or laptops in certain areas.

Jammers also block signals by transmitting synchronized radio waves on the same frequency as a mobile phone or drone in order to blur the signal.

How it Works

The most common type of wifi jammers is signal jammers which are designed to produce radio waves that will interfere with and disrupt the signal of other wireless devices. This will make it impossible for other people in the area to use their smartphones, tablets, and laptops for surfing the Internet or making phone calls.

Wifi jammers are illegal in many countries, and you should be aware of the potential legal implications before using one.

Why Use Wifi Jammers

There are many reasons why someone would want to use a wifi jammer. For example, if you are in an area where there is no wifi signal, and you want to get some work done. Or if you want to protect your privacy by blocking the signals from your phone or laptop. But before purchasing a wifi jammer, it’s important to know what they do and how they work.

Different Types Of Jammers

To block various forms of wireless signals, three types of jammers are used:

  1. Cellular jammers are devices that particularly block cellular signals. If a jammer is active, your cell phone will not have a network signal.
  2. Wi-Fi jammers create a frequency that prevents devices from connecting to 3G, 4G, GPRS, or cordless wifi networks by blocking wifi connections.
  3. Satellite frequencies are blocked by GPS jammers. GPS jammers are less useful for home security systems, although they are frequently used to thwart monitoring or spying.

Some robbers may try to disable security cameras with a wireless security camera jammer, regardless of the frequency used.

WiFi Jammer

Companies that deal with sensitive information prefer this to avoid leaks. The 5GHz wifi jammer can block wifi and phone signals in a fixed area for up to 40 meters.

The WiFi Mini Signal Blocker is a smaller and less expensive alternative to the 5GHz. This WiFi jammer is small enough to fit in your pocket and gives 10 meters of protection no matter where you are.

Jammer signal is useful if you need to work with sensitive data somewhere other than your office or home, such as a hotel or another public location. It’s also great for folks who prefer a little of a barrier between themselves and other people’s electronics, with up to two hours of battery life on a full charge.

Drone Jammers

Drones are only allowed to be flown in certain areas, according to the law.

Flying over private property is permissible in several parts of the country. And you never know what kind of stuff these drones might be carrying or who is in control of them.

A drone jammer is the only defense against these flying objects, safe from shooting them down.

You have a few options for drone jammers based on what kind of features you are looking for.

Anyone looking for a portable jammer like TSJ ManPackUAV which can stop most commercial drones. It has a range of 400 to 1000 meters and may be attached to your back if you want to be on the move.

TSJ UAV is the way to go if you want a stationary drone that will function around the clock in a set place, such as your house or office. It is weatherproof and has a range of 1000 to 3000 meters, making it ideal for outdoor use.

As the society we live in gets more crowded with remote devices that can transport data to and from anywhere on the planet, jammers are expected to become more popular.

3 Ways To Creating A Wifi Jammer/Blocker Without Any Special Hardware

It’s a denial of service (DoS) attack that occurs when a device communicates with a WiFi connection or wireless access point, preventing the Internet from connecting.

This time, experts from the International Cyber Security Institute (IICS) will show you how to make a WiFi jammer to block connections, just like in movies or how presidents, congressmen, governors, and other significant politicians’ security teams function.

While physical WiFi filters are possible, this guide will focus on creating a software solution with Kali Linux and three alternative techniques. You won’t need to buy any hardware or tools; all you’ll need to do is follow along with this tutorial using the method of your choice.

Method 1 – Wifijammer Script

According to IICS specialists, this is the simplest technique. Although the efficiency of this method is limited by your wireless card, you can use this script to continuously block any WiFi clients and access points within range.

Alpha cards appear to effectively jam within a block radius when the access point is saturated. For more effective targeting, granularity is provided in the settings.

Python 2.7, python-scapy, and a wireless card with injection support are required for this method.

Python Wifi Jammer

The most powerful wireless interface will be found, and monitor mode will be enabled. It will use the first monitor mode interface it finds if one is currently active. It will then start skipping channels one at a time from 1 to 11 by recognizing all access points and clients connecting to those access points. It only recognizes targets in the first pass across all wireless channels. Following that, the 1-second per channel time limit is eliminated, and the channels are skipped as soon as the authentication packets are sent. After the first step, you’ll continue to add clients and APs as you locate them.

Follow the steps below to complete the WiFi jammer installation:

  • Simply open a terminal and enter the following command:
    git clone https://github.com/DanMcInerney/wifijammer.git
  • This will fetch the wifi jammer folder from GitHub and save it to your computer.
  • Once the file has been downloaded, run ls to get a list of all the files in your current directory.
  • The next step is to navigate to the wifi jammer folder using the cd wifijammer command. To get a list of all files in this folder, type ls.
  • Then run the python wifijammer script once you’re within this folder, and you’re done.
  • This script will scan all nearby WiFi networks on various channels. When the scan begins, any devices connected to those WiFi networks will be scanned and automatically disconnected.
  • This inhibits users from connecting to the WiFi network, leading the network to become stuck.
  • Simply hit Ctrl+C to terminate the process.
  • Please keep in mind that if you are linked to a WiFi network, your connection will be lost as well. Stop the script and then reconnect to get the connection back. You won’t be able to rejoin to a wireless network if you close the terminal without stopping the script. This is critical; don’t overlook it.

Method 2 – Kickthemout Script

IICS discusses another script that is quite popular among specialists. Let’s take a look at this script before we get started because it’s a little more complicated than the wifijammer script.

  • Run the command below.
    • sudo apt-get update && sudo apt-get install nmap
  • after that execute the command
    • sudo apt-get install python3-pip
  • Then, in a new terminal, use the following line to download the script from the GitHub repository:
    • git clone https://github.com/k4m4/kickthemout.git
  • Change the location of your shell to the kickthemout folder once it’s been downloaded.
  • Run the cd kickthemout command
  • When you run ls, you’ll notice that the folder contains a lot of files. But it’s kickthemout.py that we’re looking for. This is the script file that we’ll use to bring down the WiFi networks around us.
  • We haven’t been able to run this script yet since the file doesn’t have executable permissions. Run the command to gain permission from executables.
    • chmod +x kickthemout.py
  • The script file’s color will now change to green, indicating that it is ready to start. Also, take in mind that multiple color codes in the shell may be specified.
  • Install the prerequisites with the command below.
    • sudo -H pip3 install -r requirements.tx
  • After that, you can run the command below.
    • python3 kickthemout.py

Method 3 – Aireplay

To use Aireplay to make a WiFi signal jammer, you must first alter your wireless card’s monitoring mode.

  • Find out what your WiFi card’s name is first. To change the monitoring mode, you’ll need to know what your wireless card’s name is. You can accomplish this with the iwconfig command; the default value for wlan0 is normally wlan0, but it can be different in your situation.
  • The card name in the following example is wlan0.
  • Run the iwconfig wlan0 command to see how your WiFi card is working.
  • The wireless card is identified as wlan0 and is operating in a controlled mode.
  • Run each of the following commands one by one
    • ifconfig wlan0 down
  • Your wireless card will be turned off with this command. By running this command, you will ensure that there won’t be any errors when you try to switch the WiFi card to monitor mode
    • iwconfig wlan0 mode monitor
  • This command will cause your wireless card to enter monitor mode
    • ifconfig wlan0 up
  • Switching to monitor mode will require you to turn on the WiFi card

That’s everything. It’s now in monitor mode, allowing it to quickly track packets from nearby wireless networks. Run the iwconfig wlan0 command and look at the mode component to see if the monitoring mode has been correctly activated again. You’re ready to begin if you have a monitor in front of you with a written message on it.

To see all WiFi networks near you, use the airodump-ng wlan0 command.

  • You can now view all of the networks in your WiFi range. You can only see this network if the WiFi connection is enabled in monitor mode.
  • Run these commands in a new terminal window:
    • aireplay-ng -0 0 -a [bssid] [interface]
  • The bssid refers to the mac address of the wireless network you wish to block signals from. The bssid to use is
    • C8: D7:79:51:40:0B
  • In this case, the wireless card name is wlan0
  • When all the details have been entered, this is what the command will look like:
  • Once you’ve logged in, aireplay-ng will transmit an unlimited amount of packets to the access point of your choice (router). All devices connected to that access point will lose their connectivity as a result of this. IICS specialists advise against leaving it running unless you wish to face major consequences. Simply pressing Ctrl+C will halt the onslaught.

It is important to know that using WiFi filters in public places is legally illegal. These techniques are really effective, and you may easily disable the wireless network connection throughout your neighborhood using them. Remember that this is a DoS attack variant, so use caution while employing the techniques provided. IICS experts advise employing this technique only in controlled circumstances and with the express permission of the other people involved, if possible. This tutorial is solely meant to be used for educational and research purposes. Don’t abuse this knowledge.

How Jammers Impact Home Security Systems

Cellular and Wi-Fi-based home security systems can be disrupted by jammers. Your cameras and sensors will not malfunction, but their capacity to transmit a signal will be restricted. This is obviously not the response you were hoping for, but your home security is unlikely to be compromised.

Wireless technology is used by both new and old home alarm businesses for a reason.

Not All Jamming Is Good Jamming

Why would someone try to disrupt a wifi network? To begin with, not all communication is beneficial. Someone may feel that they no longer wish to use digital communication because they are in the wrong place or at the wrong moment. Quiet train cars, secure meetings where confidential information is exchanged, or a school attempting to eliminate distractions in the classroom are all examples.

Wifi jamming has tactical use in addition to being convenient. Because so much sensitive information is now stored digitally, it can be stolen (or borrowed) without being discovered over a wifi network. The owner of the data can ensure that no one accesses it after hours by jamming wifi signals in the vicinity. Similarly, the security system that may be protecting that sensitive data is likely to rely on a wifi connection to send an alarm if something goes wrong, thus someone with malicious intent may want to tamper with that signal. An explosives specialist working to disarm a bomb, for example, could welcome it if the means of remote detonation were disabled.

As a result, the method of jamming may be determined by the wifi jammer’s objective. In such circumstances, you might just want to make as much noise as possible to prevent anything from getting through. In other circumstances, jamming may be more subtle and targeted in order to avoid detection. The goal is always the same, regardless of how loud you prefer your jamming noise.