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Remote Connections Via the Listener to the Database Fail with TNS-12526, TNS-12527 or TNS-12528 (Doc ID 444120.1)

Last updated on FEBRUARY 22, 2019

Applies to:

Oracle Net Services - Version 10.2.0.5 to 12.2.0.1 [Release 10.2 to 12.2]
Information in this document applies to any platform.

Symptoms

Connections via the listener to an instance that is in RESTRICTED status or in NO MOUNT status may fail with TNS-12526, TNS-12527 or TNS-12528 even when supplying the credentials for a privileged account.    The lsnrctl services output will show that the service handler for this instance is in state: BLOCKED or RESTRICTED.

The full error text is:

 

From the above we can see that the listener status for that instance is
"RESTRICTED"

Cause

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In this Document
Symptoms
Changes
Cause
Solution
References

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