Connecting to wireless network in NUS from your thinkpad

I have mentioned about wireless for T40 in linux here. Unfortunately, it doesn't inherently support WPA protocol. So, we have to install wpa_supplicant which support WPA and WPA2 (IEEE802.11i). The installation is available here and here. Basically, after building the source, which creates wpa_supplicant and wpa_cli with 'make' command, the binaries can be installed to /usr/local/bin.
Example commands:

make
cp wpa_cli wpa_supplicant /usr/local/bin

Then, we need to make a configuration file, /etc/wpa_supplicant.conf. The entry of the file as provided by http://opensource.nus.edu.sg/wiki/index.php/Connecting_to_PEAP_in_NUS and here:

ctrl_interface=/var/run/wpa_supplicant
network={
ssid="NUS"
scan_ssid=1
key_mgmt=IEEE8021X
eap=PEAP
ca_cert=”/etc/cert/ase1.pem”
phase2=”auth=MSCHAPV2”
}

The content of ase1.pem is as such :

-----BEGIN CERTIFICATE-----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-----END CERTIFICATE-----

Then, run the wpa_supplicant using :

wpa_supplicant -i eth1 -c /etc/wpa_supplicant.conf -B

Might want to try using -Dwext or -Dipw (deprecated)
Start wpa_gui:

wpa_gui &

Obtain ip address using:

dhclient eth1

To connect to NUSOPEN (NUS open network), set the essid to NUSOPEN:

iwconfig eth1 essid "NUSOPEN"

then obtain the ip address using dhclient as before (or dhcpcd eth1).

More info are available here:
http://www.thinkwiki.org/wiki/Wpa_supplicant
http://ipw2100.sourceforge.net/
http://en.wikipedia.org/wiki/Wpa_supplicant
http://opensource.nus.edu.sg/wiki/index.php/Main_Page
http://linuxnus.org/