Hi Lars,
Before requesting an IP address, you need to associate your machine with an
ESSID.
To know which ESSID are available around you:
$ sudo ifconfig wlan0 up
$ sudo iwlist wlan0 scan
That will give you the ESSID you can reach with the kind of encryption they
require (WEP, WPA, WPA2).
Then, depending on the encryption scheme and assuming you want to use the ESSID
named MyEssid, you will have to run either:
* for no encryption:
$ sudo iwconfig wlan0 essid "MyEssid"
* WEP using an hexadecimal key:
$ sudo iwconfig wlan0 essid "MyEssid" key 1234567890
* WEP using an ascii key:
$ sudo iwconfig wlan0 essid "MyEssid" key s:asciikey
* WPA/WPA2:
You need to edit the /etc/wpa_supplicant.conf file as described in:
$ man 5 wpa_supplicant.conf
Then:
$ sudo wpa_supplicant -B -Dwext -iwlan0 -c/etc/wpa_supplicant.conf
Wait about 10 seconds. Then:
$ sudo dhcpcd wlan0
Check if your computer has been associated correctly:
$ sudo iwconfig wlan0
Hope it helps,
Christophe
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