7

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.

  • how did u actually solved this , can you post some details – pkm Apr 4 '15 at 19:06
4

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.

1

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.

-2

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

Your Answer

By clicking “Post Your Answer”, you agree to our terms of service, privacy policy and cookie policy

Not the answer you're looking for? Browse other questions tagged or ask your own question.