Set a Failed Login Attempt Lockout Policy
You can specify the number of times a user can enter an incorrect password before they are locked out of the system. When a user reaches this limit, their account is locked for the specified number of seconds.
This feature can be enabled per user or per role, in which case every user belonging to that role will be subject to failed login attempt lockout.
Enable the Lockout Policy
To enable the lockout policy:
Set both FAILED_LOGIN_ATTEMPTS and PASSWORD_LOCK_TIME for the user or role. FAILED_LOGIN_ATTEMPTS is the number of failed attempts before the account is locked, for example: 4. PASSWORD_LOCK_TIME is the number of seconds a locked out account must wait before reattempting to log in.
Note
You must set both FAILED_LOGIN_ATTEMPTS and PASSWORD_LOCK_TIME to enable the feature.
Enable the lockout feature at 4 failed attempts, with a lockout time of 4 hours (14400 seconds) when creating a user:
CREATE USER user1 WITH FAILED_LOGIN_ATTEMPTS = 4 PASSWORD_LOCK_TIME = 14400;
Enabling the feature for a role:
CREATE ROLE general WITH FAILED_LOGIN_ATTEMPTS = 4 PASSWORD_LOCK_TIME = 14400;
If a user is associated with more than one role with different password lock times, the larger PASSWORD_LOCK_TIME value is applied.
If a user and a role the user is tied to have conflicting FAILED_LOGIN_ATTEMPTS settings, the lower value is applied.
Update Lockout Settings
If the PASSWORD_LOCK_TIME value is updated for a role or user, the new setting applies to currently locked accounts. For example, if a locked out user’s lockout time setting is 1 day, and PASSWORD_LOCK_TIME is then set to 4 hours, the new limit is enforced and the account will be unlocked 4 hours after it was locked. If a user’s lockout time setting is 4 hours, and the setting is increased to 1 day, the user will remain locked out for 1 day.
If the FAILED_LOGIN_ATTEMPTS setting for a locked out user is updated to be higher than the current setting, the user is unlocked. If the new setting is lower than the current number of failed login attempts, and also higher than the user’s current number of failed login attempts, the new setting is ignored until the user successfully logs in. The user is still subject to the original FAILED_LOGIN_ATTEMPTS setting.
Unlock a Locked Account
To unlock a locked account:
Use the ALTER USER command and specify ACCOUNT UNLOCK.
ALTER USER user ACCOUNT UNLOCK;
If sync permissions is not enabled, ACCOUNT UNLOCK should be issued on the aggregator where the user is to be unlocked.
If sync_permissions is enabled, ACCOUNT UNLOCK should be issued on the Master Aggregator since all user modifications will have to come from the Master. This will unlock the account across the cluster.