[oracle] How to connect to Oracle 11g database remotely

I install the Oracle server and it allows to connect from the local machine with no problem. But from another Maclaptop on my home network, it can't connect using either Sql Developer or Sql Plus. After doing some research, I figured out there is this additional step you have to do:

Use the Oracle net manager. Select the Listener. Add the IP address (in my case it is 192.168.1.12) besides of the 127.0.0.1 or localhost.

This will end up add an entry to the [OracleHome]\product\11.2.0\dbhome_1\network\admin\listener.ora

  • restart the listener service. (note: for me I reboot machine once to make it work)

  • Use lsnrctl status to verify
    Notice the additional HOST=192.168.1.12 shows up and this is what to make remote connection to work.

    C:\Windows\System32>lsnrctl status
    LSNRCTL for 64-bit Windows: Version 11.2.0.1.0 - Production on 05-SEP-2015 13:51:43
    Copyright (c) 1991, 2010, Oracle. All rights reserved.
    Connecting to (DESCRIPTION=(ADDRESS=(PROTOCOL=IPC)(KEY=EXTPROC1521)))
    STATUS of the LISTENER


    Alias LISTENER
    Version TNSLSNR for 64-bit Windows: Version 11.2.0.1.0 - Production
    Start Date 05-SEP-2015 13:45:18
    Uptime 0 days 0 hr. 6 min. 24 sec
    Trace Level off
    Security ON: Local OS Authentication
    SNMP OFF
    Listener Parameter File
    D:\oracle11gr2\product\11.2.0\dbhome_1\network\admin\listener.ora
    Listener Log File d:\oracle11gr2\diag\tnslsnr\eagleii\listener\alert\log.xml
    Listening Endpoints Summary...
    (DESCRIPTION=(ADDRESS=(PROTOCOL=ipc)(PIPENAME=\.\pipe\EXTPROC1521ipc)))
    (DESCRIPTION=(ADDRESS=(PROTOCOL=tcp)(HOST=127.0.0.1)(PORT=1521)))
    (DESCRIPTION=(ADDRESS=(PROTOCOL=tcp)(HOST=192.168.1.12)(PORT=1521)))
    Services Summary...
    Service "CLRExtProc" has 1 instance(s).
    Instance "CLRExtProc", status UNKNOWN, has 1 handler(s) for this service...
    Service "xe" has 1 instance(s).
    Instance "xe", status READY, has 1 handler(s) for this service... Service "xeXDB" has 1 instance(s).
    Instance "xe", status READY, has 1 handler(s) for this service... The command completed successfully

  • use tnsping to test the connection
    ping the IPv4 address, not the localhost or the 127.0.0.1

C:\Windows\System32>tnsping 192.168.1.12
TNS Ping Utility for 64-bit Windows: Version 11.2.0.1.0 - Production on 05-SEP-2015 14:09:11
Copyright (c) 1997, 2010, Oracle. All rights reserved.
Used parameter files:
D:\oracle11gr2\product\11.2.0\dbhome_1\network\admin\sqlnet.ora

Used EZCONNECT adapter to resolve the alias
Attempting to contact (DESCRIPTION=(CONNECT_DATA=(SERVICE_NAME=))(ADDRESS=(PROTOCOL=TCP)(HOST=192.168.1.12)(PORT=1521)))
OK (0 msec)