LAN-W300N/U2@TPC-500

TPC-500 debian

　USL-5Pで使えるようにする予定ですが、debian(squeeze)@TPC-500で予行練習です。
　webの情報でLAN-W300N/U2に対応するモジュールが"rt2870sta"であるのもすぐ分かりました。
http://wiki.debian.org/rt2870staに手順が説明されています。
　firmware-ralink, wireless-toolsをインストールして、アダプタを接続します。dmesgで

[ 2156.688080] usb 1-2: new high speed USB device using ehci_hcd and address 4
[ 2156.838312] usb 1-2: New USB device found, idVendor=0789, idProduct=0166
[ 2156.838336] usb 1-2: New USB device strings: Mfr=1, Product=2, SerialNumber=3
[ 2156.838357] usb 1-2: Product: 802.11 n WLAN
[ 2156.838373] usb 1-2: Manufacturer: Ralink
[ 2156.838388] usb 1-2: SerialNumber: 1.0
[ 2156.842051] usb 1-2: configuration #1 chosen from 1 choice
[ 2156.926212] rt2870sta: module is from the staging directory, the quality is unknown, you have been warned.
[ 2156.983170] rtusb init --->
[ 2156.984737] === pAd = dd13c000, size = 470632 ===
[ 2156.984754] <-- RTMPAllocAdapterBlock, Status=0
[ 2156.997932] usbcore: registered new interface driver rt2870

と出ますので、認識しています。
　iwconfigすると、

...
wlan0     Ralink STA  ESSID:""  
          Mode:Auto  Frequency=2.412 GHz  
          Link Quality=10/100  Signal level:0 dBm  Noise level:-143 dBm
          Rx invalid nwid:0  Rx invalid crypt:0  Rx invalid frag:0
          Tx excessive retries:0  Invalid misc:0   Missed beacon:0

　問題無さそうです。
　iwlist scanしてみても

wlan0     Scan completed :
          Cell 01 - Address: aa:bb:cc:dd:ee:ff
                    Protocol:802.11b/g/n
                    ESSID:"essid1"
                    Mode:Managed
                    Channel:10
                    Quality:100/100  Signal level:-31 dBm  Noise level:-115 dBm
                    Encryption key:on
                    Bit Rates:18 Mb/s
                    IE: WPA Version 1
                        Group Cipher : CCMP
                        Pairwise Ciphers (1) : CCMP
                        Authentication Suites (1) : PSK
                    IE: IEEE 802.11i/WPA2 Version 1
                        Group Cipher : CCMP
                        Pairwise Ciphers (1) : CCMP
                        Authentication Suites (1) : PSK
          Cell 02 - Address: aa:bb:cc:dd:ee:ff
                    Protocol:802.11b/g
                    ESSID:"essid2"
                    Mode:Managed
                    Channel:1
                    Quality:26/100  Signal level:-79 dBm  Noise level:-115 dBm
                    Encryption key:on
                    Bit Rates:18 Mb/s
          Cell 03 - Address: aa:bb:cc:dd:ee:ff
                    Protocol:802.11b/g/n
                    ESSID:"essid3"
                    Mode:Managed
                    Channel:1
                    Quality:31/100  Signal level:-77 dBm  Noise level:-115 dBm
                    Encryption key:on
                    Bit Rates:18 Mb/s
                    IE: WPA Version 1
                        Group Cipher : TKIP
                        Pairwise Ciphers (2) : CCMP TKIP
                        Authentication Suites (1) : PSK
                    IE: IEEE 802.11i/WPA2 Version 1
                        Group Cipher : TKIP
                        Pairwise Ciphers (2) : CCMP TKIP
                        Authentication Suites (1) : PSK
          Cell 04 - Address: aa:bb:cc:dd:ee:ff
                    Protocol:802.11b/g/n
                    ESSID:"essid4"
                    Mode:Managed
                    Channel:1
                    Quality:26/100  Signal level:-79 dBm  Noise level:-115 dBm
                    Encryption key:on
                    Bit Rates:18 Mb/s
                    IE: WPA Version 1
                        Group Cipher : CCMP
                        Pairwise Ciphers (1) : CCMP
                        Authentication Suites (1) : PSK
          Cell 05 - Address: aa:bb:cc:dd:ee:ff
                    Protocol:802.11b/g
                    ESSID:"essid5"
                    Mode:Managed
                    Channel:10
                    Quality:100/100  Signal level:-33 dBm  Noise level:-115 dBm
                    Encryption key:on
                    Bit Rates:18 Mb/s

　GUIではwicdなどで設定出来るみたいですけど、うまくいきません。
　wicdも使えるようにはなりたいですが、CUIで
http://wiki.debian.org/WiFi/HowToUse#wpa_supplicant
の"wpa_supplicant"以下の手順を使ってみました。理解は今ひとつですが、、、

# ifup wlan0
Internet Systems Consortium DHCP Client 4.1.1-P1
Copyright 2004-2010 Internet Systems Consortium.
All rights reserved.
For info, please visit https://www.isc.org/software/dhcp/

Listening on LPF/wlan0/aa:bb:cc:dd:ee:ff
Sending on   LPF/wlan0/aa:bb:cc:dd:ee:ff
Sending on   Socket/fallback
DHCPDISCOVER on wlan0 to 255.255.255.255 port 67 interval 7
DHCPDISCOVER on wlan0 to 255.255.255.255 port 67 interval 8
DHCPOFFER from 192.168.x.y
DHCPREQUEST on wlan0 to 255.255.255.255 port 67
DHCPACK from 192.168.x.y
bound to 192.168.x.z -- renewal in 37538 seconds.

　無事接続出来ました。