UNIX: ORA-12537 or ORA-12546 or ORA-12547 when connecting to the Database via the Listener
Last updated on JULY 31, 2017
Applies to:Oracle Net Services - Version 184.108.40.206 to 220.127.116.11 [Release 8.1.7 to 12.2]
Checked for relevance on 30-Apr-2010
Connection to the database server fails with ORA-12546 or ORA-12537
Local (BEQUEATH) connections work fine but a connection via the Listener fails with ORA-12537 or ORA-12547
[oracle@myhost]$ sqlplus myuser/mypass@mytns
SQL*Plus: Release 18.104.22.168.0 - Production on Fri Apr 30 21:32:18 2010
Copyright (c) 1982, 2008, Oracle. All rights reserved.
ORA-12537: TNS:connection closed
This is likely a new installation.
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