Authentication problem

[Hamid Salim]

On Wed, 3 Aug 2005, Hamid Salim wrote:

>  radutmp: check_with_nas = yes
>  radutmp: perm = 384
>  radutmp: callerid = yes
> Module: Instantiated radutmp (radutmp)
> Listening on authentication *:1812
> Listening on accounting *:1813
> Listening on proxy *:1814
> Ready to process requests.
>
Dusty's response:
You need to figure out why your NAS is not sending radius packets to the
radius server.

Check your network connections, your firewall rules, etc..

My question:
i am not using NAS (as i understand) also i am not using Radius 
accounting. I am trying to use FreeRadius solely for authentication. 
what is check_with_nas = yes used for? do i need to change this???

thanks.
Hamid.