TNS Database Error Messages TNS-12678: Authentication disabled but required December 18, 2020 mpbod TNS-12678: Authentication disabled but required Cause: The configuration parameters that control whether SQL*Net authentication is disabled or required were both set to TRUE. Action: Set one or both of the parameters to FALSE. Back to previous menu https://support.oracle.com/ http://www.oracle.com/ Share this:Click to email a link to a friend (Opens in new window)Click to print (Opens in new window)Click to share on Facebook (Opens in new window)Click to share on LinkedIn (Opens in new window)Click to share on Tumblr (Opens in new window)Click to share on Twitter (Opens in new window)Click to share on Pinterest (Opens in new window)Click to share on Reddit (Opens in new window)Click to share on Pocket (Opens in new window)