Radius – Server 2008 R2 NPS

We’ve OLYMPUS DIGITAL CAMERA         been using NPS on Server 2008 for a while now and its been perfect for handling 802.1x authentication (EAPTLS) and radius auth from the HP WESM in the 5400zl. The radius setup for the HP Wireless Edge Services was pretty easy, it only needs radius clients for the Primary WESM and any Redundant WESM’s.

Now that we’re adding another 50-70 E-MSM422 AP’s for the MSM765 controller we need to add radius clients for each AP. After a conversation with Adam (@DJADSA) we worked out that we were going to hit the 50 radius client limit in Server 2008 Standard. Adam showed me a couple of neat tricks with their NPS configuration that would save us a tonne of time and are new additions to R2!

The first trick was adding a subnet range for Radius Clients instead of adding a radius client for AP individually. Adding the IP/CIDR and shared secret will let all devices in the range talk to the NPS server.


The next tip from Adam was with the Accounting in NPS. We’d tried to get SQL logging to behave in Server 2008 a few times and failed miserably. The NPS application in 2008 would connect to a SQL database but wouldn’t create the structure etc. There was a sql script on the web that would create it for you but we didn’t have any luck getting it all to work properly. 2008 R2 has a new wizard for setting up NPS accounting and the final stage of the wizard gives you the option of creating the SQL structure of the database. very tidy


With SQL logging enabled it give us the option of writing a web part or two for SharePoint to let staff know which users are connected where, and lets us easily run scripts to find client/authentication problems.