Can anyone give me details about FreeRadius compatibility? My questions are :

 
1- Dose radius operate easily with Cisco equipments (including firewalls, VPN, … ) and other hardware VPN servers?

2- The same question for software VPN, such as Microsoft Routing and Remote Access Server (RRAS)?

3- the same question for access points?

3- What version or variants of the following standards and methods dose radius support  :  X802.1X, EAP-X?

- Is there available plug-in that allow to interface with ActiveDirectory ? LDAP directories ? Databases (Oracle, MySQL, etc) ?

Where can I find the features of the actual version of radius?

I want to develop a plug-in for FreeRadius. This plug-in should be able to handle authentication requests send from a VPN server (either hardware, Cisco or a Software (MS RRAS) implementation) or an AccessPoint.

The second requirements, is that this plug-in should be able to interface with the different users Data store including ActiveDirectory, LDAP directories and Databases, to accomplish user authentication.

 
How should I proceed to do this? Should I develop multiples modules?

Is their any existing code that I can use to develop such a plug-in?

 
Any additional indication are welcome.

Thanks in advance.