We have internet access in both LAN and WLAN in our offices which is only used to internet access.
How do we enable a password based authentication in this infrastructure so that authenticated user will type a user name and password first to gain access to the Internet services? Whenever a user will connect to a SSID the system will prompt for a user name and password. After verifying the user name and password the user will be given internet access.
I have read many articles on it and came to know RADIUS server can be one solution for this. I look forward how to configure one with Ubuntu Linux (preferably) and store user name and password in a database (if possible) so that the server will authenticate only those users.