Fun with Intel 4965 wireless + kismet +aircrack-ng

September 17th, 2008

I thought I’d share with you how the latest iwl4965 wireless drivers are doing w/ respect to kismet, monitor mode, packet injection, cracking WEP, etc

1. Stock Debian 2.6.25-2-486 kernel, kismet 2008-05-R1 ( from Debian unstable ) , ThinkPad X61 with

utumno# lspci | grep 4965
03:00.0 Network controller: Intel Corporation PRO/Wireless 4965 AG or AGN Network Connection (rev 61)

Results: managed, ad-hoc mode – works, monitor mode – works, kismet is able to see management packets but no data packets. No matter what I do, it will not see clients nor data packets.

Coming out from monitor mode is kinda problematic: I press ‘Q’ in kismet, then it either segfaults leaving my card in an unknown state ( rmmod iwl4965; modprobe iwl4965 fixes that ) or sometimes exits cleanly but warns me that resetting the card failed. I still have to rmmod+modprobe to use the card in Managed mode.

Packet injection does not work. Trying out the latest compat-wireless-2008-07-19 + packet injection patches ( here’s the tutorial ) does not work either: such compiled driver does not even work in managed mode, and rmmoding it results in a hard freeze ( there’s nothing I can do apart from pushing the reset button )

2) Stock 2.6.26 kernel from, latest ( 2008-07-19 ) compat-wireless ( download the cutting edge wireless drivers from here ) with packet injection patches for iwl4965 and mac80211 , the same kismet 2008-05-R1 and ThinkPad X61:

Managed, ad-hoc mode fully work. Kismet is now able to see data packets and clients. Exiting it sucks even worse now, though: I press ‘Q’, it will always hang. The only way to recover is press ‘Ctrl-Z’ to put it in the background, kill -9 it and rmmod+modprobe the drivers.

Packet injection with AirCrack-ng works, at least the injection test passes. I haven’t tried any more sophisticated attacks yet.

Side note: with 2.6.26 also the LED in my laptop (signifying that wireless is being used) started working. So progress in all fronts, except exiting kismet 🙂

One Response to “Fun with Intel 4965 wireless + kismet +aircrack-ng”

  1. leszek Says:

    Debian’s stock 2.6.26-1-686 kernel (no patches), the same kismet and Thinkpad ( basically the current software from Debian unstable with no tweaking ) : exactly the same situation like with 2.6.25-2-486. Kismet only sees management packets, quitting it doesn’t work.

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