16.10 - About External Authentication Controls - Teradata Database

Teradata Database Security Administration

Teradata Database
Release Number
Release Date
June 2017
Content Type
Publication ID
English (United States)

You can use external authentication controls to:

  • Disable external authentication and allow only Teradata Database authentication
  • Enable both external authentication and Teradata Database authentication
  • Disable Teradata Database authentication and allow only external authentication

The controls are set so that external authentication of users is globally enabled by default in the database, however in addition to the control settings, you must also do the following to use external authentication:

  • GRANT LOGON...WITH NULL PASSWORD privileges to individual Teradata Database users who use external authentication
  • Verify that the corresponding external authentication mechanism is enabled on each client (note, all mechanisms are enabled by default on the client, so this applies only if you change the default configuration on the client), each database system accessed by the client, and on all Unity servers through which database clients log on.
If users log on to Teradata Database through Unity, external authentication controls and WITH NULL PASSWORD privileges should be the same on all database systems managed by Unity.