The router must enforce information flow control using explicit security attributes on information, source, and destination objects. Security attributes used as a basis for flow control decisions may include, but are not limited to IP addresses, Port numbers, Protocol, Autonomous System Path, and interfaces.

Overview

Finding ID	Version	Rule ID	IA Controls	Severity
SRG-NET-000020-RTR-000015	SRG-NET-000020-RTR-000015	SRG-NET-000020-RTR-000015_rule		Medium

Description

Information flow control regulates where information is allowed to travel within a network and between interconnected networks. The flow of all network traffic must be monitored and controlled so it does not introduce any unacceptable risk to the network infrastructure or data. Restrictions can be enforced based on source and destination IP addresses as well as the ports and services being requested. This requirement should enforce the deny-by-default policy whereby only the known and accepted traffic will be allowed outbound and inbound.

STIG	Date
Router Security Requirements Guide	2013-07-30

Details

Check Text ( C-SRG-NET-000020-RTR-000015_chk )
Verify source and destination objects are used as a basis for information flow between the router and other network elements. If non-explicit attributes are used for information flow control, this is a finding. If source and destination objects are not used, this is a finding.

Fix Text (F-SRG-NET-000020-RTR-000015_fix)
Configure the router to enforce flow control using explicit security attributes on information, source, and destination objects as a basis for flow control decisions.