ORA-12541 Unable To Connect To Remote Database Using 9i R2 EM Console Only.
(Doc ID 341625.1)
Last updated on MARCH 18, 2011
Applies to:Oracle Enterprise Manager - Version: 126.96.36.199 to 188.8.131.52 - Release: to 9.2
Oracle Net Services - Version: 184.108.40.206.0 and later [Release: 9.2 and later]
Information in this document applies to any platform.
The following error message is reported trying to connect to a remote Oracle instance using the Enterprise Manager (EM) Standalone Console when connected via a Virtual Priviate Network (VPN) software to the backend network.ORA-12541 'TNS: NO LISTENER'
Unable to connect to the Oracle DB.
However, other Oracle9iR2 (220.127.116.11) applications and utilities from the same Windows machine worked, such as TNSPING and Sqlplus.
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