How to Put Wireless Interface into Monitor Mode 2020

To start smelling the frequencies we need a wifi card compatible with monitor mode, this means it theoretically the monitor interface is passive – just receive packets! But with some drivers like mac80211 we can also transmit packets – Packet Injection! Wonderland.

10 Steps to Secure a Wireless Network Security in 2020

Table of Contents

  • Hardware Compatibility
  • Tool Used
  • Starting interface Into Monitor Mode
  • Some errors you may find!

Hardware Compatibility

More information about packet Inspection here!

Tool Used

Airmon-ng tool is a full app to deal with interfaces monitor mode, we can put an interface monitor mode and we can specify a specific channel to start monitoring avoiding channel hopping.

airmon-ng <start|stop> <interface> [channel]
airmon-ng <check|check kill>

Starting interface Into Monitor Mode

airmon-ng start wlan0 6
airomon-ng stop wlan0mon

If you need help choosing on card verify our list here!  What are the best Wifi cards to crack wifi passwords?

Some errors you may find!

Found 4 processes that could cause trouble.
If airodump-ng, aireplay-ng or airtun-ng stops working after
a short period of time, you may want to kill (some of) them!

To resolve this problem these days the airmon-ng tools already have a parameter to kill the processes that could cause troubles, like:

airmon-ng check
airmon-ng check kill

If you want, you can use the Unix command kill to terminate the processes that are interfering with wifi interface, something like:

kill PID

kill 635   ->  Has we can see at the picture  above the process with the pid 635 it’s from Network Manager from my machine.

And that’s it, you can start smell the frequencies around the world! Some of them smell pretty nice

And if you have been having problems with your wifi cards drivers, check this topic here!

1 thought on “How to Put Wireless Interface into Monitor Mode 2020”

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