After I install freeradius 1.1.0, and I have not changed radiusd.conf, I start freeradius: ./radiusd -X it shows: Module: Instantiated detail (detail) Module: Loaded radutmp radutmp: filename = "/usr/local/freeradius/var/log/radius/radutmp" radutmp: username = "%{User-Name}" radutmp: case_sensitive = yes radutmp: check_with_nas = yes radutmp: perm = 384 radutmp: callerid = yes Module: Instantiated radutmp (radutmp) Listening on authentication *:1812 Listening on accounting *:1813 Ready to process requests. Then I use the command to test: ./radtest test teset localhost 0 testing123 It shows: Sending Access-Request of id 71 to 127.0.0.1 port 1812 User-Name = "test" User-Password = "teset" NAS-IP-Address = 255.255.255.255 NAS-Port = 0 Re-sending Access-Request of id 71 to 127.0.0.1 port 1812 User-Name = "test" User-Password = "teset" NAS-IP-Address = 255.255.255.255 NAS-Port = 0 ........ radclient: no response from server for ID 65 and the server has not any response. I don't know why?