Limit access to internet by mac using freeradius

["Ali Jawad" <alijawad1@gmail.com>]

Hi Ive got a micro ISP with 50 clients running on pppoe and freeradius
for authenication, each client has a username and password. When a
customer dials through his winbox to create pppoe connection the pppoe
server on the server loads radius.so to do the authenication. What I
want to do now is the following...
I want to authenicate based on mac address and i do not want to use
pppoe anymore..so everybody plugging in a network cable into my switch
will have immediate internet access only if I have registered his mac
address for him previously, otherwise everybody plugging his network
cable into my swithces will have access to my internet connection. I
mean I need something like the mac address filtering used in squid
...where only registered mac address are allowed through the proxy..any
hints suggestions and/or tutorials are welcome.

-- 
With Regards Ali Jawad