# SI-04 System Monitoring — NIST 800-53 Rev5 control

> FedRAMP Consolidated Rules for 2026 v2026.07.14.01 · updated 2026-07-14
> Canonical page: /control/si-4

Canonical id: `si-4` · family `SI`

> a. Monitor the system to detect: 1. Attacks and indicators of potential attacks in accordance with the following monitoring objectives: [monitoring objectives]; and 2. Unauthorized local, network, and remote connections; b. Identify unauthorized use of the system through the following techniques and methods: [techniques and methods]; c. Invoke internal monitoring capabilities or deploy monitoring devices: 1. Strategically within the system to collect organization-determined essential information; and 2. At ad hoc locations within the system to track specific types of transactions of interest to the organization; d. Analyze detected events and anomalies; e. Adjust the level of system monitoring activity when there is a change in risk to organizational operations and assets, individuals, other organizations, or the Nation; f. Obtain legal opinion regarding system monitoring activities; and g. Provide [system monitoring information] to [personnel or roles] [assignment].

_Control title and statement: NIST SP 800-53 Rev5 catalog (the pinned commit is in `/api` under `control_text`). The FedRAMP rules reference these controls by id only; everything below is what FedRAMP says about this id._

## Rev5 baseline membership

- certification class B
- certification class C
- certification class D

## Key Security Indicators that reach it

- `KSI-MLA-RVL` — Reviewing Logs (Monitoring, Logging, and Auditing)
  Logs are persistently reviewed and audited.
- `KSI-SVC-EIS` — Evaluating and Improving Security (Service Configuration)
  Information resources are persistently evaluated for opportunities to improve security and those improvements are persistently made.

## FedRAMP guidance

{
  "guidance": [
    "Follow all applicable rules within the Vulnerability and Detection Response and Incident Communication Procedure guidance."
  ]
}