Free radius installation

[George Chelidze]

> Scanning localhost (127.0.0.1) [1000 ports]
> Completed UDP Scan at 09:36, 1.21s elapsed (1000 total ports)
> Host localhost (127.0.0.1) is up (0.0000090s latency).
> Interesting ports on localhost (127.0.0.1):
> Not shown: 996 closed ports
> PORT     STATE         SERVICE
> 111/udp  open|filtered rpcbind
> 1812/udp open|filtered radius
> 1813/udp open|filtered radacct
> 5353/udp open|filtered zeroconf
> ...
> Listening on authentication address * port 1812
> Listening on accounting address * port 1813
> Listening on command file /var/run/radiusd/radiusd.sock
> Listening on proxy address * port 1814
> Ready to process requests.
> ...
> [root at localhost ~]# radtest test test localhost 0 testing123
> Sending Access-Request of id 42 to ::1 port 1812
>          User-Name = "test"
>          User-Password = "test"
>          NAS-IP-Address = 127.0.0.1
>          NAS-Port = 0

you are nmapping 127.0.0.1 which is ipv4 interface to check whether 
radiusd is listening (why not try neststat -lnp instead?), while sending 
radtest queries to ::1 which is ipv6. are you sure your radiusd is 
listening for ::1 as well?

my 2 cents.

George