AC-9(4)—Additional Logon Information
>Control Description
Notify the user, upon successful logon, of the following additional information: ⚙organization-defined additional information.
>Supplemental Guidance
Organizations can specify additional information to be provided to users upon logon, including the location of the last logon. User location is defined as information that can be determined by systems, such as Internet Protocol (IP) addresses from which network logons occurred, notifications of local logons, or device identifiers.
>Assessment Interview Topics
Questions assessors commonly ask
Process & Governance:
- •What formal policies and procedures govern the implementation of AC-9(4) (Additional Logon Information)?
- •Who are the designated roles responsible for implementing, maintaining, and monitoring AC-9(4)?
- •How frequently is the AC-9(4) policy reviewed and updated, and what triggers policy changes?
- •What training or awareness programs ensure personnel understand their responsibilities related to AC-9(4)?
Technical Implementation:
- •Describe the specific technical mechanisms or controls used to enforce AC-9(4) requirements.
- •What automated tools, systems, or technologies are deployed to implement AC-9(4)?
- •How is AC-9(4) integrated into your system architecture and overall security posture?
- •What configuration settings, parameters, or technical specifications enforce AC-9(4) requirements?
Evidence & Documentation:
- •What documentation demonstrates the complete implementation of AC-9(4)?
- •What audit logs, records, reports, or monitoring data validate AC-9(4) compliance?
- •Can you provide evidence of periodic reviews, assessments, or testing of AC-9(4) effectiveness?
- •What artifacts would you present during a FedRAMP assessment to demonstrate AC-9(4) compliance?
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