The IDPS must analyze outbound communications traffic at selected interior points within the network as deemed necessary to discover anomalies.

Overview

Finding ID	Version	Rule ID	IA Controls	Severity
V-34779	SRG-NET-000264-IDPS-00189	SV-45703r1_rule		Medium

Description
IDPS sensors must be deployed at strategic locations within the network. At a minimum, they must be deployed within the DMZ and behind the firewall. It is important to not only monitor traffic entering the enclave but also leaving. Placing a sensor behind the firewall will provide a clear analysis of what type of traffic and potential attacks are passing through the firewall. Monitoring outbound traffic enables the network operator to detect an attack towards another network with the local enclave as the base. Monitoring outbound traffic can also detect abnormal traffic or mischievous activities by internal personnel.

Description

IDPS sensors must be deployed at strategic locations within the network. At a minimum, they must be deployed within the DMZ and behind the firewall. It is important to not only monitor traffic entering the enclave but also leaving. Placing a sensor behind the firewall will provide a clear analysis of what type of traffic and potential attacks are passing through the firewall. Monitoring outbound traffic enables the network operator to detect an attack towards another network with the local enclave as the base. Monitoring outbound traffic can also detect abnormal traffic or mischievous activities by internal personnel.

STIG	Date
Intrusion Detection and Prevention Systems (IDPS) Security Requirements Guide	2012-11-19

Details

Check Text ( C-43070r1_chk )
Verify one or more sensors on the internal network segments are configured to monitor outbound traffic. If outbound traffic is not monitored by one or more internal sensors, this is a finding.

Fix Text (F-39101r1_fix)
Configure one or more internal sensors to monitor outbound traffic.