Configurar Servidor Oracle

Hola eh instalado Oracle 11g en mi computadora de escritorio y todo bien el asunto es que quiero que otros usuarios se puedan conectar a mi maquina desde red local sin problemas, ya tengo los usuarios creados separados en un tablespace y un esquema ahora necesito que se puedan conectar.
Adjunto mi archivo tnsnames.ora, listener.ora y sqlnet.ora.

[quote]
# tnsnames.ora Network Configuration File: C:\CARPETAORACLE\product\11.2.0\dbhome_2\network\admin\tnsnames.ora
# Generated by Oracle configuration tools.

LISTENER_TESTORACLE =
(ADDRESS = (PROTOCOL = TCP)(HOST = localhost)(PORT = 1521))

ORACLR_CONNECTION_DATA =
(DESCRIPTION =
(ADDRESS_LIST =
(ADDRESS = (PROTOCOL = IPC)(KEY = EXTPROC1521))
)
(CONNECT_DATA =
(SID = CLRExtProc)
(PRESENTATION = RO)
)
)

TESTORACLE =
(DESCRIPTION =
(ADDRESS = (PROTOCOL = TCP)(HOST = localhost)(PORT = 1521))
(CONNECT_DATA =
(SERVER = DEDICATED)
(SERVICE_NAME = TESTORACLE)
)
)

[/quote]

[sql]
# listener.ora Network Configuration File: C:\CARPETAORACLE\product\11.2.0\dbhome_2\network\admin\listener.ora
# Generated by Oracle configuration tools.

SID_LIST_LISTENER =
(SID_LIST =
(SID_DESC =
(SID_NAME = CLRExtProc)
(ORACLE_HOME = C:\CARPETAORACLE\product\11.2.0\dbhome_2)
(PROGRAM = extproc)
(ENVS = «EXTPROC_DLLS=ONLY:C:\CARPETAORACLE\product\11.2.0\dbhome_2\bin\oraclr11.dll»)
)
)

LISTENER =
(DESCRIPTION_LIST =
(DESCRIPTION =
(ADDRESS = (PROTOCOL = IPC)(KEY = EXTPROC1521))
(ADDRESS = (PROTOCOL = TCP)(HOST = localhost)(PORT = 1521))
)
)

ADR_BASE_LISTENER = C:\CARPETAORACLE
[/sql]

[sql]
# sqlnet.ora Network Configuration File: C:\CARPETAORACLE\product\11.2.0\dbhome_2\network\admin\sqlnet.ora
# Generated by Oracle configuration tools.

# This file is actually generated by netca. But if customers choose to
# install «Software Only», this file wont exist and without the native
# authentication, they will not be able to connect to the database on NT.

SQLNET.AUTHENTICATION_SERVICES= (NTS)

NAMES.DIRECTORY_PATH= (TNSNAMES, EZCONNECT)
[/sql]

La pregunta es que necesito configurar para que pueda ser accesible la direccion ip de mi maquina en la red es 192.168.0.53.

Gracias de antemano