MidnightBSD Developer Journal

Setting up an airport express based network is a pain with BSD or Windows.   My configuration is with WPA2 personal and non broadcasted SSID.  Most everything in google is about WEP.  WPA2 only does not play nice with my setup on the airport end. 

Here's my working config for reference:

/etc/wpa_supplicant.conf

ctrl_interface=/var/run/wpa_supplicant
ctrl_interface_group=wheel
ap_scan=2

network={
    ssid="The name of my lovely network"
    scan_ssid=1
    proto=WPA2
    key_mgmt=WPA-PSK
    psk=myhexkey
}

if you don't use a hex value... use quotes for psk=
/etc/rc.conf ...
ifconfig_ndis0="WPA DHCP"

(this could be the problem with WPA vs WPA2 above)

This does seem to work.  I have two airport express wireless routers with the latest firmware (6.3 i think)