Change FreeRADIUS Default Port Number

Arran Cudbard-Bell a.cudbardb at
Fri Jan 23 10:53:12 CET 2015

> On 23 Jan 2015, at 16:13, Russell Mike <radius.sir at> wrote:
> Greetings Experts
> I often notice attacks on our FreeRADIUS server. To stop these attacks, i
> am thinking to change the default authentication port from 1812 to
> something different.
> 1.) Is it correct thing to do ?
> 2.) Would it even help ? Stop or reduce fake auth attempts ?
> 3.) How do we modify the default port to set different port for FreeRADIUS?

Where are the auth attempts originating from? Must be a trusted source, else
they wouldn't be processed.

Arran Cudbard-Bell <a.cudbardb at>
FreeRADIUS development team

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