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Currently we have a Vigor 3300 router that acts as our VPN server. At the moment we set up connections for home workers manually in the device.

What I would like to do is remove this extra step and instead allow them to use their Active Directory credentials to login to the VPN. I understand RADIUS is the way to do this. Unfortunately the manual for the Vigor is quite cryptic, although it give details on how to set up the unit itself I am unsure about how I set up the actual RADIUS server.

Can any one offer some generic advice on how to do this, or point to a resource on the internet that is idiot proof.

Much appreciated.

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up vote 3 down vote accepted

Windows Server supports RADIUS authentication against Active Directory. In Server 2008, this service is called Network Policy Server (NPS). Prior Windows named this service Internet Authentication Service (IAS). Server 2008 NPS RADIUS diagram

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