Ubuntu Dapper / Edgy
Install OpenVPN
apt-get install openvpn
Install PAM Radius authentication module
apt-get install libpam-radius-auth
Link the OpenVPN radius plugin to the PAM module folder
ln -s /usr/lib/openvpn/openvpn-auth-pam.so /lib/security
Create the PAM configuration file for OpenVPN
#/etc/pam.d/openvpn
#%PAM-1.0
auth sufficient pam_radius_auth.so debug
account sufficient pam_permit.so
session sufficient pam_permit.so
Create the OpenVPN configuration and add the call to the Radius plugin
#/etc/openvpn/server.conf
plugin /lib/security/openvpn-auth-pam.so openvpn
Add server information to the Radius config file
#/etc/pam_radius_auth.conf
{server-ip-address} {shared-secret}
Configure the “Internet Authentication Service (IAS)” on your windows server.
(configuration guide soon)