Debian:configure WPA

requirements: wpa2-psk with tkip, intel ipw220, dhcp, roaming with different aps from zmore /usr/share/doc/wpasupplicant/README.modes.gz
tested on ubuntu 6.10 (edgy)

/etc/network/interfaces

# the roaming interface MUST use the manual inet method
iface eth1 inet manual
        wpa-driver wext                           #also for intel ip2200!!!!
        wpa-roam /etc/wpa_supplicant/wpa_supplicant.conf

# no id_str, 'default' is used as the fallback mapping target
iface default inet dhcp

# id_str="uni"
iface uni inet dhcp

# id_str="home_static"
iface home_static inet static
        address 192.168.0.20
        netmask 255.255.255.0
        network 192.168.0.0
        broadcast 192.168.0.255
        gateway 192.168.0.1

wpa_supplicant.conf

network={
        ssid="foo"
        # this id_str will notify /sbin/wpa_action to 'ifup uni'
        id_str="uni"
        key_mgmt=NONE
}

network={
        ssid="bar"
        # this id_str will notify /sbin/wpa_action to 'ifup home_static'
        id_str="home_static"
        psk=123456789...
}

network={
        ssid=""
        # no 'id_str' is given, /sbin/wpa_action will 'ifup default'
        key_mgmt=NONE
}

#need wpa2 with tkip
network={
        pairwise=TKIP
        group=TKIP
        ssid="youressid"
        scan_ssid=1 # only needed if your access point uses a hidden ssid
        proto=WPA
        key_mgmt=WPA-PSK
        psk=f7cab7b6ecd68702dd989956568b6ecd68349343b6ecd68943b6bf95fa08079dad7
}