Listener Password and 11gr2listener have been discarded in Oracle Database 11gR2.

Listener Password and 11gr2listener have been discarded in Oracle Database 11gR2.

Listener Password has been discarded in Oracle Database 11gR2

See Deprecation of Listener Password in Oracle Database 11g Release 2 (Document ID 1328725.1)

Applicable:
Oracle Net Services-Version 11.2.0.1 to 11.2.0.3 [Release 11.2]
Information in this document applies to any platform.
Checked for currency 8-jul-2013

Details:
Listener Password has been deprecated in Oracle Database 11gR2, which will not cause security loss, because identity authentication is implemented through local operating system identity authentication.

Action:
When upgrading to Oracle Database 11g Release 2 (Patch Set 11.2.0.3 and later), follow the steps below to migrate a listener that has a set password:

1. Remove all PASSWORDS_listener_name entries from the listener. ora file.
2. Reload the listener using the following command: lsnrctl reload listener_name

If remote administration of a listener is required, then use one of the following methods to connect to and administer the listener.
• Connect to the host where listener is running using SSH or other secure method, and then perform local administration. Local administration is enforced by the operating system authentication.
• Use Oracle Enterprise Manager to administer the listener. Oracle Enterprise Manager uses HTTPS, which ensures security.

Please note, that this feature will be de-supported in the next major Oracle Database version (currently called 12g) and will then no longer be available.

For more information please refer to the following Oracle Database 11g Release 2 documentation:
Oracle Database Net Services Administrator's Guide (html, pdf)-Chapter 9 'logging and Administering Oracle Net Listener'
Oracle Database Net Services Reference (html, pdf)-Appendix B 'Upgrade Considerations for Oracle Net services'