Do not turn on the security service even if the other side wants it.
My side of the connection specifies that the security service is not allowed. If the other side specifies required, the connection will terminate with error message ORA-12650. If the other side is set to requested, accepted, or rejected, the connection will continue without error and without the security service enabled.
Copyright © 1996, 2011, Oracle and/or its affiliates. All rights reserved.
Oracle is a registered trademark of Oracle Corporation and/or its affiliates.
Other names may be trademarks of their respective owners.