2

I tried to run the command to test if my device supports monitor mode,

airmon-ng start wlan-0

and this is the error is received,

ERROR adding monitor mode interface: command failed: Operation not supported (-95)

Apparently, I am using a Raspberry Pi 4 model B for network scanning, but it does not support monitor mode for this to happen. Can anyone suggest me a way to have this mode on my device.

toyota Supra
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Harein Avishka Jayasekara
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  • Off the top of my head: did you try running that with sudo, and is your interface really called wlan-0, and not wlan0? And then, there's always the option to buy a USB stick with a recommended chipset. – Dmitry Grigoryev Mar 03 '21 at 16:46

4 Answers4

4

If you look at the chip configuration on the RasPi with:

rpi ~$ iw list
Wiphy phy0
--- snip ---
    Supported interface modes:
             * IBSS
             * managed
             * AP
             * P2P-client
             * P2P-GO
             * P2P-device
--- snap ---

There is no monitor mode available, so you are out of luck with sniffing WiFi networks with a Raspberry Pi. There is a project nexmon on github that patches the WiFi firmware to make the monitor mode available. Seems not to be an easy task but you may have a look at it.

For some additional information you can also look at Enable monitor mode.

You may consider to purchase an additional USB/WiFi dongle that supports monitor mode.

Ingo
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2

I ran the aircrack program with my Raspberry Pi 4 8 gig approximately 1 week ago. I had no issues setting the internal WiFi interface into monitor mode.

Then again I was running Kali on the pi hardware. Although that shouldn't matter I don't think.

Mats Karlsson
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Bashran
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  • My only guess is that kali comes with the correct kernel to support monitor mode – Lorenzo Jun 02 '22 at 22:32
  • I tested it on RaspberryOS RPI-4 4GB and could not enter monitor mode. SET failed on device wlan0 ; Operation not supported. – M.Hefny Sep 18 '22 at 23:45
0

I got the wireless card in my Raspberry Pi 4B into monitor mode by running these commands:

sudo ip link set wlan0 down && \
sudo iw wlan0 set monitor control && \
sudo ip link set wlan0 up
MatsK
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loby
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  • Are you sure? tried this and got an error on the second command – Jaromanda X Feb 03 '24 at 01:41
  • I thought it worked for me before. Now when I run iwconfig it shows the card is in monitor mode, but the actual operations are not working. I recommend this wireless card if you're on a budget. https://www.amazon.com/dp/B01GC8XH0S – loby Feb 04 '24 at 03:08
0

I have attached a PAU09, from Amazon, that does a fine monitoring

ABM K
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