wpa wireless setup in gentoo

Reference: http://www.thinkwiki.org/wiki/How_to_install_wpa_supplicant


1. # echo "net-wireless/wpa_supplicant madwifi" >> /etc/portage/package.use
2. # emerge -av wpa_supplicant
3. # wpa_passphrase "ssid" "wpa_passphrase" % get the psk
4. % create /etc/wpa_supplicant.conf
# cat /etc/wpa_supplicant.conf

ctrl_interface=/var/run/wpa_supplicant
ctrl_interface_group=0
eapol_version=1
# ap_scan=1 was the one for me you may try 0 or 2 indstead of 1
ap_scan=1
fast_reauth=1

network={
ssid="ssid"
proto=WPA
key_mgmt=WPA-PSK
pairwise=TKIP
group=TKIP
#psk="passphrase"
psk=xxxxx # a bunch of numbers and letters from wpa_passphrase
}


To start the network:

1. # ifconfig ath0 up
2. # wpa_supplicant -B -c /etc/wpa_supplicant.conf -iath0 -Dmadwifi
%% -B is the daemon mode, -d is the live mode
3. dhcpcd ath0

%% if dhcpcd has a time out, use `iwlist ath0 scan' to check the channel number and then change (ap_scan) in the config file. restart wpa_supplicant (if it's in daemon mode, kill the process and then restart)