Oracle Database 19c : Add Oracle Net Listener2021/06/01

	Add Oracle Net Listener that is the network service on Oracle.
[1]	Login with Oracle user and add Net Listener with [netca] command.

# create a response file

# all parameters below are default values, change them for your needs

[oracle@dlp ~]$

vi netca.rsp

[GENERAL]
RESPONSEFILE_VERSION="19.0"
CREATE_TYPE="CUSTOM"

[oracle.net.ca]
INSTALLED_COMPONENTS={"server","net8","javavm"}
INSTALL_TYPE=""typical""
LISTENER_NUMBER=1
LISTENER_NAMES={"LISTENER"}
LISTENER_PROTOCOLS={"TCP;1521"}
LISTENER_START=""LISTENER""
NAMING_METHODS={"TNSNAMES","ONAMES","HOSTNAME"}
NSN_NUMBER=1
NSN_NAMES={"EXTPROC_CONNECTION_DATA"}
NSN_SERVICE={"PLSExtProc"}
NSN_PROTOCOLS={"TCP;HOSTNAME;1521"}

[oracle@dlp ~]$

netca -silent -responsefile $(pwd)/netca.rsp

Parsing command line arguments:
    Parameter "silent" = true
    Parameter "responsefile" = /usr/oracle/netca.rsp
Done parsing command line arguments.
Oracle Net Services Configuration:
Profile configuration complete.
Oracle Net Listener Startup:
    Running Listener Control:
      /usr/oracle/database/bin/lsnrctl start LISTENER
    Listener Control complete.
    Listener started successfully.
Listener configuration complete.
Oracle Net Services configuration successful. The exit code is 0

[2]	After creating Listener, [tnslsnr] listens on the port you configured like follows.

[oracle@dlp ~]$

ss -napt | grep 1521

LISTEN     0      128                     *:1521                   *:*     users:(("tnslsnr",pid=8450,fd=8))

[oracle@dlp ~]$

tnsping localhost


TNS Ping Utility for Linux: Version 19.0.0.0.0 - Production on 01-JUN-2021 01:47:41

Copyright (c) 1997, 2019, Oracle.  All rights reserved.

Used parameter files:
/usr/oracle/database/network/admin/sqlnet.ora

Used EZCONNECT adapter to resolve the alias
Attempting to contact (DESCRIPTION=(CONNECT_DATA=(SERVICE_NAME=))(ADDRESS=(PROTOCOL=tcp)(HOST=127.0.0.1)(PORT=1521)))
OK (0 msec)

[3]	If Firewalld is running, allow listener port.

[root@dlp ~]#

firewall-cmd --add-port=1521/tcp --permanent

success
[root@dlp ~]#

firewall-cmd --reload

success

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