VNCR is set in the listener.ora file but still able to register a REMOTE Database to the Listener

(Doc ID 2302966.1)

Last updated on AUGUST 31, 2017

Applies to:

Oracle Net Services - Version 11.2.0.4 and later
Information in this document applies to any platform.

Symptoms

After applying the Valid Node Checking Registration (VNCR) security setting to a TNS Listener, remote registration is STILL possible from another (remote) Server.
So the following parameter is set and the listener (called LISTENER in this example) was restarted:

 
This should not be happening when VNCR is set to ON


Cause

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