I have an Oracle 11g XE installed in Ubuntu 12.4 and facing difficulty with getting the Oracle to bind on a TCP port. The IP6 binding seems to be fine but not the IP4 (tcp 0.0.0.0:1521).
Here is the oracle-xe status:
root@pearBox:~# /etc/init.d/oracle-xe status
LSNRCTL for Linux: Version 11.2.0.2.0 - Production on 06-JUN-2013 15:08:34
Copyright (c) 1991, 2011, Oracle. All rights reserved.
Connecting to (DESCRIPTION=(ADDRESS=(PROTOCOL=IPC)(KEY=EXTPROC_FOR_XE)))
STATUS of the LISTENER
------------------------
Alias LISTENER
Version TNSLSNR for Linux: Version 11.2.0.2.0 - Production
Start Date 06-JUN-2013 15:06:42
Uptime 0 days 0 hr. 1 min. 52 sec
Trace Level off
Security ON: Local OS Authentication
SNMP OFF
Default Service XE
Listener Parameter File /u01/app/oracle/product/11.2.0/xe/network/admin/listener.ora
Listener Log File /u01/app/oracle/diag/tnslsnr/pearBox/listener/alert/log.xml
Listening Endpoints Summary...
(DESCRIPTION=(ADDRESS=(PROTOCOL=ipc)(KEY=EXTPROC_FOR_XE)))
(DESCRIPTION=(ADDRESS=(PROTOCOL=tcp)(HOST=pearBox)(PORT=1521)))
(DESCRIPTION=(ADDRESS=(PROTOCOL=tcp)(HOST=pearBox)(PORT=8080))(Presentation=HTTP)(Session=RAW))
Services Summary...
Service "PLSExtProc" has 1 instance(s).
Instance "PLSExtProc", 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
Netstat results:
root@pearBox:~# netstat -ntpl
Active Internet connections (only servers)
Proto Recv-Q Send-Q Local Address Foreign Address State PID/Program name
tcp 0 0 127.0.0.1:3306 0.0.0.0:* LISTEN 914/mysqld
tcp 0 0 0.0.0.0:80 0.0.0.0:* LISTEN 1859/apache2
tcp 0 0 0.0.0.0:22 0.0.0.0:* LISTEN 608/sshd
tcp6 0 0 :::22447 :::* LISTEN 1757/xe_d000_XE
tcp6 0 0 :::8080 :::* LISTEN 1655/tnslsnr
tcp6 0 0 :::1521 :::* LISTEN 1655/tnslsnr
tcp6 0 0 :::22 :::* LISTEN 608/sshd
And the listener configuration:
root@pearBox:~# cat /u01/app/oracle/product/11.2.0/xe/network/admin/listener.ora
# listener.ora Network Configuration File:
SID_LIST_LISTENER =
(SID_LIST =
(SID_DESC =
(SID_NAME = PLSExtProc)
(ORACLE_HOME = /u01/app/oracle/product/11.2.0/xe)
(PROGRAM = extproc)
)
)
LISTENER =
(DESCRIPTION_LIST =
(DESCRIPTION =
(ADDRESS = (PROTOCOL = IPC)(KEY = EXTPROC_FOR_XE))
(ADDRESS = (PROTOCOL = TCP)(HOST = pearBox)(PORT = 1521))
)
)
DEFAULT_SERVICE_LISTENER = (XE)
I changed the hostname to "HOST = 127.0.0.1" and it is binding on localhost, but I am not able to access the Oracle instance from the network!
root@pearBox:~# netstat -ntpl
Active Internet connections (only servers)
Proto Recv-Q Send-Q Local Address Foreign Address State PID/Program name
tcp 0 0 127.0.0.1:3306 0.0.0.0:* LISTEN 914/mysqld
tcp 0 0 0.0.0.0:80 0.0.0.0:* LISTEN 1859/apache2
tcp 0 0 127.0.0.1:1521 0.0.0.0:* LISTEN 2339/tnslsnr
tcp 0 0 0.0.0.0:22 0.0.0.0:* LISTEN 608/sshd
tcp6 0 0 :::21121 :::* LISTEN 2443/xe_d000_XE
tcp6 0 0 :::22
I would appreciate if you could help to get this issue resolved.
Copyright Notice：Content Author:「Mantichora」，Reproduced under the CC 4.0 BY-SA copyright license with a link to the original source and this disclaimer.
Link to original article：https://stackoverflow.com/questions/16964996/oracle-xe-not-binding-on-ip4-port-1521