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Hi.

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So in this lesson we are going to learn and understand about i w config where I w stands for interface

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wireless.

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So any time you connect any wireless device into your computer, so let's say a data dongle which is

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used to connect your system to our wi fi point, you can see the IP address of that specific device

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using i w config.

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It is very much similar to i f config which is interface configuration.

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But here you can specifically see all the wireless devices connected to your host machine.

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Now if you want, you can change the side name through which you can denote and identify that specific

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wireless device that is connected to your host using a name which is known as E as a side name.

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Also, we will see how can we change the mode of the wireless device that has been connected to our

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system from managed to monitor mode?

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Now what is the difference between managed mode and monitor mode?

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By default, all the wireless devices that we use that are connected to our systems are in managed mode.

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That means that it is only capable to listen all the network traffic or data packets that are coming

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to our Linux machine or going out through our Linux machine.

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Whereas when we put our devices in monitor mode, we are able to listen the data traffic or packets

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which is not being sent to our Linux machine or our Windows machine.

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This technique is generally used for wi fi cracking in which we are able to see what data packets are

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being transferred from different routers around us in our range.

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Make a note over here.

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Not all devices support monitor mode.

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So before purchasing a device, always check that it supports monitor mode or no.

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Let's jump to the practical time and let's see how can we see connect wireless devices to the system,

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change their sides and change the mode from managed to monitor.

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Here.

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You can see I'm onto my terminal.

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I'm going to run the command.

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If config were in, we can see two such adapters which is at zero and loopback.

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I'm going to run the next command which is i w config which stands for interface wireless configuration.

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Here we can see there is no wireless device that has been connected.

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I have connected a wireless device just now in my system and now we can see it has been detected over

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here.

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You can see the mode is managed currently as we discussed and the side is off.

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If you run the command I f config here we can see it also detects now our external wireless device that

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has been connected to the system.

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Now we are going to change the inside of the device, that is to denote and identify the wireless device

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that has been connected to the system.

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The command is I the blue config, the blue line zero, which is the adapter eastside and any name that

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you want we can successfully see before the name was off any.

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Now the name has been changed to activate.

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Now let's change the mode from managed to monitor.

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The command to do this.

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I the blue config.

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The adapter which is w len zero mode monitor.

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When we do this, it gives an error.

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It's because the device is currently in use and when the device is in use, we cannot change its mode.

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Keep that in mind.

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So we have to turn off the device first.

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So we are going to take that interface down.

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Using the command i f config w len zero down and now we will again run the command to put it back to

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monitor mode.

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And now you can see our device has successfully tuned its mode to monitor.

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Now let's turn back the device using w len zero up and you can see our device is back up and running.

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Let's again verify the name and the mode.

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You can see the mode has been changed to monitor mode.

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Now let's turn this off once again and let's change the mode back to managed using the same command.

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Let's turn it back up and let's validate once more.

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And you can see our external device is again in its default state of managed mode, which can be verified

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from here as well.

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I hope you guys understood.

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Thank you.