Alan, The LDAP server was already configred in other machine by System Administrator. I am trying to link FreeRadius to that existing and already running LDAP server and authenticate the users using already configured attribute. I didn't download LDAP on this machine where FreeRadius is running. I made the LDAP option "on" during the FreeRadius installation like: ==> The following configuration options are available for freeradius-2.1.10_2: USER=on "Run as user freeradius, group freeradius" KERBEROS=on "With Kerberos support" HEIMDAL=off "With Heimdal Kerberos support" LDAP=on "With LDAP database support" MYSQL=on "With MySQL database support" PGSQL=on "With PostgreSQL database support" UNIXODBC=on "With unixODBC database support" FIREBIRD=on "With Firebird database support (EXPERIMENTAL)" PERL=on "With Perl support" PYTHON=on "With Python support" OCI8=on "With Oracle support (currently experimental)" RUBY=on "With Ruby support (EXPERIMENTAL)" DHCP=on "With DHCP support (EXPERIMENTAL)" EXPERIMENTAL=on "Build experimental modules" UDPFROMTO=on "Compile in UDPFROMTO support" ===> Use 'make config' to modify these settings *The scenario is LDAP is already running in one server and Freeradius is running in another server. I just changed the configuration settings on freeBSD server where FreeRadius is running as:* */usr/local/etc/raddb/modules/ldap :* ldap { # Define the LDAP server and the base domain name server = "localhost" basedn = "dc=example,dc=com" # Define which attribute from an LDAP "ldapsearch" query # is the password. Create a filter to extract the password # from the "ldapsearch" output password_attribute = "userPassword" filter = "(uid=%{Stripped-User-Name:-%{User-Name}})" # The following are RADIUS defaults start_tls = no dictionary_mapping = ${raddbdir}/ldap.attrmap ldap_connections_number = 5 timeout = 4 timelimit = 3 net_timeout = 1 } */usr/local/etc/raddb/sites-enabled/default :* authorize { ... ... # # The ldap module will set Auth-Type to LDAP if it has not # already been set Ldap ... ... } Auth-Type LDAP { ldap } Also, same type of modifications has been done on : */usr/local/etc/raddb/sites-enabled/inner-tunnel* Also, change has been made to users file adding LDAP user authentication. Thanks for the suggestions........... -- View this message in context: http://freeradius.1045715.n5.nabble.com/ldap-freeradius-tp2781398p4978695.ht... Sent from the FreeRadius - User mailing list archive at Nabble.com.