Enabling and Disabling Authentication Methods
When you create an authentication method, Vertica stores it in the catalog and enables it automatically. To enable or disable an authentication method, use the ALTER AUTHENTICATION statement. To use this approach, you must be connected to your database.
If an authentication method has not been enabled, Vertica cannot use it to authenticate users and clients trying to connect to the database.
To enable an authentication method:
ALTER AUTHENTICATION v_kerberos ENABLE;
To disable this authentication method:
ALTER AUTHENTICATION v_kerberos DISABLE;