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Wouter Vandenputte
Asked: 2012-11-22 12:56:05 +0800 CST

"ERROR while getting interface flags: no such device"

  • 772

The command

airmon-ng start wlan0

gives as output

Found 5 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!
PID    Name
3258   wpa_supplicant
4175   NetworkManager
4180   dhclient
4190   avahi-daemon
4191   avahi-daemon 
Process with PID 4180 (dhclient) is running on interface wlan0

Interface       Chipset       Driver  

wlan0           Unknown       wl - (phy0]mon0: ERROR while getting interface flags: Onjuist apparaat  

                              (monitor mode emabled on mon0)

and then I type

ifconfig mon0 down

and I get this error:

ERROR while getting interface flags: no such device

The error will probably start at airmon-ng start wlan0.

aircrack-ng

3 Answers

  1. To quote from the aircrack-ng site:

    This means you have an old version of airmon-ng installed. Upgrade to at least v1.0-rc1.

    They add chipset information/support in their newer releases, as well as incorporate patches.

    To upgrade to the latest version of aircrack-ng, please follow the steps in this answer.

    • 4

  2. There are two possible reasons for this error I came through so far.

    1. Device is in use: Kill all processes mentioned which could cause trouble, e.g.

      kill -9 3258 (kills your wpa_supplicant)

    2. Update to latest aircrack-ng version: The documentation suggests to update to the latest version from svn.

    If this does not help, you should provide more information/details on the issue.

    • 1

  3. The problem is with the name of the interface

    So, type airmon-ng to start your wireless interface in monitoring mode

    Then type airmon-ng check kill to kill all the interfering processes

    Now type

    airodump-ng wlan0mon

    instead of typing

    airodump-ng mon0

    I hope this will work, if not please comment

    • -2