The IDPS must continuously monitor inbound communications traffic for unusual/unauthorized activities or conditions.

Overview

Finding ID	Version	Rule ID	IA Controls	Severity
V-55381	SRG-NET-000390-IDPS-00212	SV-69627r1_rule		Medium

Description
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.

Description

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.

STIG	Date
Intrusion Detection and Prevention Systems (IDPS) Security Requirements Guide	2017-07-07

Details

Check Text ( C-55997r1_chk )
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 (F-60247r1_fix)
Configure the IDPS to continuously monitor inbound communications traffic for unusual/unauthorized activities or conditions.