Their prices vary from $13 total per month to up to $750+ per server, plus additional servicing fees.

Is Radius server still used?

RADIUS has evolved far beyond just the dial up networking use-cases it was originally created for. Today it is still used in the same way, carrying the authentication traffic from the network device to the authentication server.

What is required for a Radius server?

Any hardware platform capable of running Windows 2012+ will be able to support the radius agent. The following minimum requirements can be used as a baseline: Processor: Minimum: 1.4 GHz 64-bit Processor. RAM: Minimum: 512 MB.