Can the MTASR3-200 be used with Radius Server for remote user authentication. If so, how do I configure it?

Here is how you enable radius in the MTASR3-200:

1) Run the RASFinder configuration manager

2) Click on PPP/Slip setup

3) Click on Advanced

4) Click on Radius

5) Enable Radius

6) Enter a shared secret

7) Enter the Radius Primary Server Address