What is the most common gap auditors find on ID.AM-03?

Diagrams outdated after migrations

`ID.AM-03` Representations of the organization's authorized network communication and internal and external network data…

Q: What evidence do auditors commonly ask for on ID.AM-03 Representations of the organization's authorized network communication and internal and external network data…?

Network diagrams with current data flow annotations; Authorized communication matrix with allowed protocols; Data flow diagrams covering regulated data; Firewall rule base traceable to authorized flows; Annual flow validation walkthrough records.

Representations of the organization's authorized network communication and internal and external network data flows are maintained

Source: NIST CSF 2.0, ID.AM-03. The statement above is our statement of the clause, read from the published text and cited so you can check it against the official text, not the instrument verbatim. Open NIST CSF 2.0 in the compliance library.

artefacts

held by a system

at each review

hard

to go live

Policy repository / GRC workspace

where the evidence lives

teal = a system already holds it · olive = produced at each review. To go live: easy when half or more of the artefacts are already held by a system, moderate from a quarter to a half, hard below a quarter.

These are the artefacts auditors commonly ask for on this requirement, our guidance rather than text from the standard. Your assessor decides what is sufficient in your context, and asks for samples across the period when a report covers one.

system holds itEvidence a system already holds

Firewall rule base traceable to authorized flows · Cloud console / configuration management

periodic reviewEvidence produced at each review

Annual flow validation walkthrough records · Document repository

governing documentDocuments that govern the control

Network diagrams with current data flow annotations · Policy repository / GRC workspace
Authorized communication matrix with allowed protocols · Policy repository / GRC workspace
Data flow diagrams covering regulated data · Policy repository / GRC workspace

First move

Mostly documents and reviews. Pull the 1 system-held artefact from your Cloud console / configuration management on a schedule; put the documents under version control with an owner and review date, and log each review as a dated record with a named reviewer.

Common gaps auditors find

Diagrams outdated after migrations
Cloud and partner flows missing
Firewall rules outlive their justification
No flow validation performed

Do this for your whole sheet

Paste the rows you run your controls from and get this mapping for every control at once, with the periodic-review ones flagged and a first move per row. No account for the first run.

Build my evidence sheet

ID.AM-02 Inventories of software, services, and systems managed by the organization are maintained · ID.AM-04 Inventories of services provided by suppliers are maintained