RADIUS client-server connection across internet

[Alan DeKok]

On Oct 10, 2019, at 3:34 AM, Aaron Peschel <aaron.peschel at gmail.com> wrote:
> 
> I'm looking to connect a Point to Site VPN endpoint to a RADIUS server
> across the internet, and I'm looking for some guidance on whether my
> understanding is correct.
> 
> My understanding is having a RADIUS server listening directly on the
> internet would be bad security-wise, and should not be done, is this
> correct?

  Yes.

> Instead, a better architecture would be to connect the RADIUS server and
> client over a secured channel, like a Site to Site VPN connection.

  Yes.

> Is my understanding correct here? Would it be fine to connect a client to
> the server over the internet directly? Is there an alternative simpler
> solution that I am overlooking?

  RADIUS over TLS.  FreeRADIUS supports it, as does radsecproxy.

  Alan DeKok.