BaselineWatch
Desk
Your fleet and your work Fleetyour releases and the hardware they run onTriagewhat needs a decisionWatchlistthe products and platforms you runSaved searchesthe lists you come back to
This instance Sourceswhat is read, how often, under what termsDigestthe daily or weekly summary, and alerts
How it is drawn Appearancethe look and the colour schemeBrandingthe mark this instance wears
Owner sign-in

AC-09(02) Successful and Unsuccessful Logons

NIST SP 800-53 (controls) 5.2.0 against 5.2.0
All changes in this version
unchanged AC part of AC-9

Title

Successful and Unsuccessful Logons

Control

Notify the user, upon successful logon, of the number of [Selection: successful logons; unsuccessful logon attempts; both] during [Assignment: time period].

Discussion

Information about the number of successful and unsuccessful logon attempts within a specified time period allows the user to recognize if the number and type of logon attempts are consistent with the user’s actual logon attempts.

Parameters

ac-09.02_odp.01: [successful logons; unsuccessful logon attempts; both]
ac-09.02_odp.02: time period

Assessment objective

AC-09(02) the user is notified, upon successful logon, of the number of [Selection: successful logons; unsuccessful logon attempts; both] during [Assignment: time period].

STIG rules that implement this control 0

No followed STIG rule cites a CCI indexed to this control (CCI list 2026-07-14).