which nas_type for Mikrotik WiFi AP NAS ?

[Alan DeKok]

On Oct 2, 2025, at 9:36 AM, Franta Hanzlík via Freeradius-Users <freeradius-users at lists.freeradius.org> wrote:
> If I manage to set it up, I would like to use dynamic VLAN based on 
> the logged in client (or its group).

  That should work.  And doesn't need checkrad.pl

> But it probably won't work for some sophisticated COA, IMO it just need 
> to send to Mikrotik the 'Mikrotik-Wireless-VLANID' attribute with 
> the VLAN number in response to the authentication request.
> I have found the attribute "manually" and I want to "manually" set it
> - I don't know if it can be called COA...

  That's not CoA.  It's just adding an attribute to the reply.  There's lots of documentation and examples for adding attributes to the reply.

> I'll try to find some example/instructions on the internet on how to 
> set this up. And if someone could send me a link, I'd be very grateful, 
> that would be great.

  You don't need the Internet.  The server comes with many examples.  See sites-available/default.  There are lots of example of adding attributes to the reply.

   If you want full online documentation, see https://www.freeradius.org/documentation/freeradius-server/3.2.8/

> I'm not using it and quick grep over FreeRadius 3.2.8 (which I'm using) 
> sources show that "mikrotik[_snmp]" is used only in checkrad - but checkrad 
> man page says 
> "checkrad is used by the radius server to check ...".
> Thus it seems as Freeradius uses the Mikrotik nas_type indirectly, when is
> calling the checkrad.

  Yes, it only uses checkrad, but only when you're using Simultaneous-Use.  If that doesn't mean anything to you, then you can ignore checkrad and nas_type

  Alan DeKok.