User Authentication via Websitewith Apache

[Konne]

hi

i would like to authenticate my user via apache-ssl over a website where 
the user must fill in his AD username and password. only if this is 
correct he can access the internet.
my question is, if this is possible. an what i have to use that this 
would be secure. like the traffic between client-ap-freeradius. eap-tls? 
peap/mschapv2 ... i have no idea... pls help me :-)

thx
Konne