The following file will configure a listener for a single database instance (ORAC) using the TCP/IP protocol:
SQLNET.AUTHENTICATION_SERVICES = (NONE) USE_PLUG_AND_PLAY_LISTENER = OFF USE_CKPFILE_LISTENER = OFF LISTENER = (ADDRESS_LIST = (ADDRESS= (PROTOCOL=IPC) (KEY= ORAC.world) ) (ADDRESS= (PROTOCOL=IPC) (KEY= ORAC) ) (ADDRESS = (COMMUNITY = TCP.world) (PROTOCOL = TCP) (Host = 10.10.1.2) (Port = 1526) ) ) STARTUP_WAIT_TIME_LISTENER = 0 CONNECT_TIMEOUT_LISTENER = 10 TRACE_LEVEL_LISTENER = OFF SID_LIST_LISTENER = (SID_LIST = (SID_DESC = (GLOBAL_DBNAME = ORAC.world) (SID_NAME = ORAC) (ORACLE_HOME = /disk01/oracle/product/7.3.4) (PRESPAWN_MAX = 10) (PRESPAWN_LIST = (PRESPAWN_DESC = (PROTOCOL = TCP) (POOL_SIZE = 10) (TIMEOUT = 0)) ) ) )