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Old 10-05-2008, 12:59 PM   #1
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Registered: Oct 2008
Location: Northern California
Distribution: Currently Ubuntu
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Monitor Mode on wlan0


My problem is on a DELL Inspiron 2200. I am not sure how to identify what wireless chipset is. I am trying to get the wireless card to get into monitoring mode, so that I can play with aircrack-ng on my home network.

I would also be interested in other peoples opinions of this application.

Output from trying to run airodump
/$ sudo airodump-ng wlan0

ioctl(SIOCSIWMODE) failed: Device or resource busy
Error setting monitor mode on wlan0

Output from iwconfig

Mode:Managed Frequency:2.462 GHz Access Point: 00:18:4D:DA:55:7A
Bit Rate=1 Mb/s Tx-Power=27 dBm
Retry min limit:7 RTS thr:off Fragment thr=2346 B
Link Quality=65/100 Signal level=0 dBm Noise level=-45 dBm
Rx invalid nwid:0 Rx invalid crypt:0 Rx invalid frag:0
Tx excessive retries:0 Invalid misc:0 Missed beacon:0

Output from iwconfig wlan0 mode monitor
/$ iwconfig wlan0 mode monitor
Error for wireless request "Set Mode" (8B06) :
SET failed on device wlan0 ; Operation not permitted.

Output of iwpriv wlan0 (not sure what this means)
/$ iwpriv wlan0
wlan0 no private ioctls.

I am a linux newbie, so I appologize if I haven't provided you with all the needed information.

Last edited by edwardtomney; 10-05-2008 at 01:10 PM. Reason: Needed to disable smilies and found more information
Old 10-05-2008, 02:17 PM   #2
Registered: Aug 2006
Location: London
Distribution: Debian, Kubuntu
Posts: 572

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First, disable network manager (i.e. you can just right-click on nm-applet and un-tick enable networking).

Then (you need root privileges for this):

sudo iwconfig wlan0 mode Monitor


sudo airodump-ng wlan0
Old 10-06-2008, 12:30 AM   #3
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Registered: Oct 2008
Location: Northern California
Distribution: Currently Ubuntu
Posts: 4

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Thank you


Thank you! That was easy. For anyone else having this problem, after you disable networking, give it a few moments to finish that process, before you try the above mentioned steps.

I was wondering, is there a way to disable the networking like you had me do from the command line?

Again, thank you very much !!!


inspiron, mode, set

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