Hi All, I know that this topics has been discussed many times but all solution/answers found on the mailing list didn't work for me (sure that is my fault!) When I stop the service and I run freeradius -xxx the message is: Thu Nov 26 15:14:25 2015 : Info: ... adding new socket proxy address * port 47256 Thu Nov 26 15:14:25 2015 : Debug: Listening on authentication address * port 1812 Thu Nov 26 15:14:25 2015 : Debug: Listening on accounting address * port 1813 Thu Nov 26 15:14:25 2015 : Debug: Listening on authentication address 127.0.0.1 port 18120 as server inner-tunnel Thu Nov 26 15:14:25 2015 : Debug: Listening on proxy address * port 1814 Thu Nov 26 15:14:25 2015 : Info: Ready to process requests. then, I start radius and when I try to do radtest I get this error: root@raspberrypi:~# /etc/init.d/freeradius start [ ok ] Starting FreeRADIUS daemon: freeradius. root@raspberrypi:~# radtest "John Doe" hello 127.0.0.1 0 testing123 Sending Access-Request of id 126 to 127.0.0.1 port 1812 User-Name = "John Doe" User-Password = "hello" NAS-IP-Address = 127.0.1.1 NAS-Port = 0 Message-Authenticator = 0x00000000000000000000000000000000 rad_recv: Access-Reject packet from host 127.0.0.1 port 1812, id=126, length=20 Looking into a second debug I can see: Thu Nov 26 15:15:06 2015 : Debug: radiusd: #### Opening IP addresses and Ports #### Thu Nov 26 15:15:06 2015 : Debug: listen { Thu Nov 26 15:15:06 2015 : Debug: type = "auth" Thu Nov 26 15:15:06 2015 : Debug: ipaddr = * Thu Nov 26 15:15:06 2015 : Debug: port = 0 Thu Nov 26 15:15:06 2015 : Error: Failed binding to authentication address * port 1812: Address already in use Thu Nov 26 15:15:06 2015 : Error: /etc/freeradius/radiusd.conf[240]: Error binding to port for 0.0.0.0 port 1812 What I'm doing wrong? For me is normal that the port is 1812 is busy because freeradius is using it! Thanks!