oracle 12c 12.2 connections Times ora-01017 invalid username / password; logon denied solution

1. Modify the oracle server-side sqlnet.ora configuration content, and increase support for low version of the client program, the test here is the linux environment, open

/opt/oracle/app/product/12.2.0/network/admin/sqlnet.ora, add the following

SQLNET.ALLOWED_LOGON_VERSION_CLIENT=9 

Then restart the oracle services systemctl restart oracle

2. The most important thing is to build user link

This column common to see yet? To assign permissions to users on a common time be sure to hook this column will be logged.