Hi All, I have successfully configure freeradius with mysql. i can radtest using command : sudo radtest alice password 192.168.2.3 1812 testing123 Sending Access-Request of id 187 to 192.168.2.3 port 1812 User-Name = "alice" User-Password = "password" NAS-IP-Address = 127.0.1.1 NAS-Port = 1812 Message-Authenticator = 0x00000000000000000000000000000000 rad_recv: Access-Accept packet from host 192.168.2.3 port 1812, id=187, length=20 Now i try squid using radius authentication. i followed step by step from : http://safesrv.net/setup-squid-and-freeradius-on-centos-5/#comment-1043 But i got error message log on cache.log Warning: Received invalid reply digest from server Warning: Received invalid reply digest from server Warning: Received invalid reply digest from server squid_rad_auth: No response from RADIUS server On radius -X debug there is error message like bellow : Sending duplicate reply to client localprivate port 42003 – ID: 2 Sending Access-Reject of id 2 to 192.168.2.3 port 42003 Waking up in 2.9 seconds. rad_recv: Access-Request packet from host 192.168.2.3 port 42003, id=2, length=63 Sending duplicate reply to client localprivate port 42003 – ID: 2 Sending Access-Reject of id 2 to 192.168.2.3 port 42003 Waking up in 0.9 seconds. Found Auth-Type = PAP # Executing group from file /usr/local/etc/raddb/sites-enabled/default +- entering group PAP {…} [pap] login attempt with password “b9?I? +�(�Ч�Y�?” [pap] Using clear text password “password” [pap] Passwords don’t match ++[pap] returns reject Failed to authenticate the user. WARNING: Unprintable characters in the password. Double-check the shared secret on the server and the NAS! Using Post-Auth-Type REJECT What is that error ? How i can solve this Thanks -- *M.Iftakhul Anwar* Meruvian Integrator High Performance Computing / Cloud Computing (HPC/CC) Office Phone : 021-93586577 Mobile Phone : 085215331477 Blog : http://blog.mervpolis.com/roller/anwar FB : http://www.facebook.com/troya.adromeda Website : www.meruvian.org