Man in the Middle Attack (MITM)

In this tutorial you will learn how to work a man in the middle attack. For this you will create and configure a simple test environment. The test environment simulates a small home network with a NAT router, a client (victim) and another client (evil) that has already penetrated the network. For the attack itself, you will get in touch with popular mitmf framework.

Attention: The tutorial is presented just for educational purposes. If you do what you have learned outside the test environment, you may be liable to prosecution.


  • VirtualBox (5.2.18)
  • Vagrant (2.1.5)

Prepare environment

In the first step, you need to configure, setup and provision the environment. Vagrant will help you here. Via Vagrant you will create all needed virtual machines (incl. SSH keys) and install the needed packages on the evil engine. Via file machines.yml you could add Vagrant boxes for Windows, macOS as well.

Note: Please remove the spaces behind etc (in the Vagrantfile)! These are only because of the security settings of my provider.

Small network changes

You must now switch from typical NAT to NAT network. For that you stop (halt) all VM’s. In the next steps you will create a new NAT network and configure the VM network adapters for this network. In the end, you simulated a simple home network.

Start all VM’s again

In this step we start all VM’s but without Vagrant.

Now check the network interfaces for both VM’s. Please note down the IP’s, you will need them in next steps. You can login in both with credentials vagrant:vagrant.

Note: In the example the evil VM has the IP: and the victim the IP: – this could be different for you.

In order not to use the VirtualBox Terminal, create a port forward from the localhost to the evil VM.

Man-in-the-middle attack

You made it, the test environment is finally ready. If you have been able to learn something new up to this point, I am glad. Now imagine the following situation. You are the victim and you surf the Internet, logging in on your popular websites. Can you imagine what can happen? In a few minutes you will see it.

Once the Ubuntu has booted, run the following command (as evil) and surf the web using the Firefox browser (as victim). If the mitmf returns an error message, repeat the command in the terminal. Be a bit patient on successful call.

Mitmf still offers a lot of plug-ins, just give it a try.