installation du wifi sur la debian de mon laptop

si ce n'est pas déjà fait installer wireless-tools et network-manager
# apt-get install wireless-tools network-manager
télécharger le firmware de ipw2000 sur http://ipw2200.sourceforge.net/
décompresser l'archive et copier les fichiers en .fw dans le répertoire devant contenir les firmware : /lib/firmware ou /usr/lib/hotplug/firmware

avant :
hoa:~# iwconfig
lo no wireless extensions.

eth0 no wireless extensions.

hoa:~#


après :

hoa:~# iwconfig
lo no wireless extensions.

eth0 no wireless extensions.

eth3 unassociated ESSID:""
Mode:Managed Channel=0 Access Point: Not-Associated
Bit Rate:0 kb/s Tx-Power=20 dBm Sensitivity=8/0
Retry limit:7 RTS thr:off Fragment thr:off
Encryption key:off
Power Management:off
Link Quality:0 Signal level:0 Noise level:0
Rx invalid nwid:0 Rx invalid crypt:0 Rx invalid frag:0
Tx excessive retries:0 Invalid misc:0 Missed beacon:0

hoa:~#


configurer le WPA :
créer les fichiers suivants :

hoa:/home/tam/Desktop# cat /etc/wpa_supplicant.conf
ctrl_interface=/var/run/wpa_supplicant

eapol_version=1
ap_scan=1
fast_reauth=1

network={
ssid="nom-du-ssid"
scan_ssid=1
proto=WPA
key_mgmt=WPA-PSK
psk="la-clé-wpa-en-hexa"
auth_alg=OPEN
priority=1
}
hoa:/home/tam/Desktop#

puis lancer :
hoa:/home/tam# wpa_supplicant -c/etc/wpa_supplicant.conf -Dwext -ieth3

et # dhclient

voici la sortie d'un iwconfig qui fonctionne :
hoa:/home/tam/Desktop# iwconfig
lo no wireless extensions.

eth0 no wireless extensions.

eth3 IEEE 802.11g ESSID:"xxxxxxxxx"
Mode:Managed Frequency:2.417 GHz Access Point: :xx:xx:xx:xx:xx
Bit Rate:54 Mb/s Tx-Power=20 dBm Sensitivity=8/0
Retry limit:7 RTS thr:off Fragment thr:off
Encryption key:xxxx-xxxx-xxxx-xxxx-xxxx-xxxx-xxxx-xxxx-xxxx-xxxx-xxxx-xxxx-xxxx-xxxx-xxxx-xxxx Security mode:open
Power Management:off
Link Quality=82/100 Signal level=-48 dBm Noise level=-90 dBm
Rx invalid nwid:0 Rx invalid crypt:18 Rx invalid frag:0
Tx excessive retries:0 Invalid misc:264 Missed beacon:7

hoa:/home/tam/Desktop# ping free.fr
PING free.fr (212.27.48.10) 56(84) bytes of data.
64 bytes from www.free.fr (212.27.48.10): icmp_seq=1 ttl=118 time=47.6 ms
64 bytes from www.free.fr (212.27.48.10): icmp_seq=2 ttl=118 time=49.2 ms
64 bytes from www.free.fr (212.27.48.10): icmp_seq=3 ttl=118 time=47.4 ms

--- free.fr ping statistics ---
4 packets transmitted, 3 received, 25% packet loss, time 2998ms
rtt min/avg/max/mdev = 47.463/48.124/49.270/0.851 ms
hoa:/home/tam/Desktop#

( voir aussi le tutoriel wpa sur ubuntu-fr )