rtl8821AU

Linux Driver for USB WiFi Adapter using Realtek 8821AU

This is my personal attempt to let Buffalo WI-U2-433DHP working on my Raspberry Pi 2 and CentOS 7.3.1611. And, it works!

Known Linux Distros

• CentOS 7.3.1611

Known Devices

• Buffalo WI-U2-433DHP
• Edimax EW-7811UAC

Eduroam

For connecting to "eduroam" network, use the following configuration in /etc/wpa_supplicant/wpa_supplicant.conf.

ctrl_interface=/var/run/wpa_supplicant
ctrl_interface_group=wheel

network={
    ssid="eduroam"
    scan_ssid=1
    key_mgmt=WPA-EAP
    eap=TLS
    pairwise=CCMP
    group=CCMP
    phase2="auth=MSCHAPV2"
    identity="<Your Email Address>"
    ca_cert="<CA Certificate>"
    client_cert="<Your Ceritificate>"
    private_key="<Your Decrypted Private Key>"
}

You often get the certificate in form of PKCS12 in a .p12 file, for example youremail.p12. To get the required files for the above configuration, you can use the following command on Linux.

To get the "CA Certificate",

openssl pkcs12 -in youremail.p12 -nokeys -cacerts -out ca.pem

To get "Your Ceritificate",

openssl pkcs12 -in youremail.p12 -nokeys -clcerts -out youremail.crt.pem

To get "Your Decrypted Private Key",

openssl pkcs12 -in youremail.p12 -nocerts -out youremail.key.pem

openssl rsa -in youremail.key.pem -out youremail.dkey.pem