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. ... [r...@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 - List info/subscribe/unsubscribe? See http://www.freeradius.org/list/users.html