Dot1x Authentication For Wireless Devices

At last I am able to configure dot1x authentication for wireless devices. My requirement is that if any user come on wireless he should be authenticated from microsoft active directory(ad) database. For implementing dot1x I have installed a microsoft active directory server with radius & dhcp. A switch was connected to server and wireless device. When ever the laptop or any pc request to connect the wireless network a logon windows screen prompt which asks for the username & passowrd with domain. On successful authentication user gets the ip address if it fails no ip is given.


regards
shivlu jain
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DHCP Authentication With Dot1x

How to secure lan so that any rougue laptop/pc donot get the ip address fom the dhcp, a big question mark, but possible in wireless media but what about wired media. Same question was asked to me few days back and my instant response was dhcp did not support authentication. But I replied we can use the dot 1x for the wired media.
So i started out my testing lab with one of my colleague and installed domain controller with radius. We use the dot1x mechanism to authenticate the pc/laptops; After 2 days testing we got the positive results.

Advantages
1. Get rid form the man in middle attack.
2. Dictionary attacks can be stopped with this.
3. Security of Lan; No one will get the ip address until and unless he/she is having domain username & password.

I am writing document on this, If someone need on urgent basics kindly mail me.
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