Title

The IDPS must continuously monitor inbound communications traffic for unusual/unauthorized activities or conditions. (Cat II impact)

Discussion

If inbound communications traffic is not continuously monitored for unusual/unauthorized activities or conditions, there will be times when hostile activity may not be noticed and defended against. Although some of the components in the site's content scanning solution may be used for periodic scanning assessment, the IDPS sensors and other components must provide continuous, 24 hours a day, 7 days a week monitoring. Unusual/unauthorized activities or conditions related to information system inbound communications traffic include, for example, internal traffic that indicates the presence of malicious code within organizational information systems or propagating among system components, the unauthorized exporting of information, or signaling to external information systems. Anomalies within organizational information systems include, for example, large file transfers, long-time persistent connections, use of unusual protocols and ports, and communications with suspected or known malicious external entities.

Check Content

Verify the IDPS continuously monitors inbound communications traffic for unusual/unauthorized activities or conditions. If the IDPS does not continuously monitor inbound communications traffic for unusual/unauthorized activities or conditions, this is a finding.

Fix Text

Configure the IDPS to continuously monitor inbound communications traffic for unusual/unauthorized activities or conditions.

Additional Identifiers

Rule ID: SV-69627r1_rule

Vulnerability ID: V-55381

Group Title: SRG-NET-000390-IDPS-00212

Expert Comments

CCIs tied to check.

Controls tied to check. These are derived from the CCIs shown above.