Hello,   I have a issue to use FreeRADIUS with Oracle DB(rlm_sql_oracle). I can see errors on log files. I don't know what is problem. I tried to find how can I fix it. but, I couldn't why. How can I fix this issue? Help me, please!!   Thank you.   I'm using CentOS 7, FreeRADIUS is 3.0.10.   Env Variables are   NLS_LANG=.AL32UTF8 ORACLE_HOME=/usr/lib/oracle/11.2/client64 TNS_ADMIN=/usr/lib/oracle/11.2/client64/network/admin LD_LIBRARY_PATH=/usr/lib/oracle/11.2/client64/lib:/usr/local/lib64   This is log   Fri Nov 13 16:04:58 2015 : Info: Found debugger attached Fri Nov 13 16:04:58 2015 : Info: rlm_sql (oracle): Driver rlm_sql_oracle (module rlm_sql_oracle) loaded and linked Fri Nov 13 16:04:58 2015 : Info: rlm_sql (oracle): Attempting to connect to database "(DESCRIPTION=(ADDRESS=(PROTOCOL=TCP)(HOST=xx.xx.xx.xx)(PORT=1521))(CONNECT_DATA=(SID=XXXXDB)))" Fri Nov 13 16:04:58 2015 : Info: rlm_sql (oracle): Opening additional connection (0), 1 of 128 pending slots used Fri Nov 13 16:04:58 2015 : Error: rlm_sql_oracle: Oracle logon failed: 'unknown' Fri Nov 13 16:04:58 2015 : Error: rlm_sql (oracle): Opening connection failed (0) Fri Nov 13 16:04:58 2015 : Error: /etc/raddb/mods-enabled/sql.oracle[20]: Instantiation failed for module "oracle"