16.10 - DefaultMechanism - Teradata Database

Teradata Database Security Administration

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

TDGSS uses the default mechanism when a user logon does not specify a mechanism. See Determining the Authentication Mechanism for a Logon for an explanation of how TDGSS determines the mechanism for a session.

Default Property Value

TDGSS initially sets the value of this property to yes for TD2, and to no for all other mechanisms, in the Teradata Database configuration files. TDGSS does not preset a default mechanism in the client configuration files.

Valid Settings

Setting Description
yes The mechanism is the default.
no The mechanism is not the default.

Supporting Mechanisms for DefaultMechanism

Mechanisms that are not listed in the table do not support this property. The Property Editable column indicates if the setting for a property may be edited.
Mechanism Property Editable?
TD2 May Be Edited
TDNEGO Do Not Edit

Editing Guidelines

  • You can set the DefaultMechanism property on Teradata Database nodes, Teradata clients, and on the Unity server.
  • You can set one only mechanism as the default on a Teradata Database system, but you can designate a different default mechanism for each client.
  • If you designate a new default mechanism, reset this property to no for the previous default mechanism.
  • If you do not designate a default mechanism, or if a user needs to use a non-default mechanism, the user must specify a mechanism.