Installation and Usage of Airodump on WRT54GL

setting WRT54GL to WLAN client mode

Log in to the webinterface of your WRT54GL. Click Network -> Wireless. Set wireless interface to "enabled" and change the mode to "client". Now click "Save Changes" then "Apply Changes".

installation of Airodump

We need to add a new repository to /etc/ipkg.conf .

Login with ssh. Open the file with
vi /etc/ipkg.conf
press i
and paste
src kamikaze-backports http://downloads.openwrt.org/backports/rc5/

Press escape, :wq and enter.

Now install:
ipkg update
ipkg install aircrack-ng
ipkg install wl

necessary configuration

wl monitor 1
ifup prism0

usage of airodump and aircrack

airoump-ng -w filetowrite prism0
I think it is not quite legal to hack wlans, even if the admin of the wlan invites you by using wep.
But it may be useful trying to hack your own wlan, for security related reasons.
For support in finding outw to find out which security holes your wlan has click here.