The network device must enforce information flow control using explicit security attributes on information, source, and destination objects as a basis for flow control decisions.

Overview

Finding ID	Version	Rule ID	IA Controls	Severity
SRG-NET-000020-NDM-000019	SRG-NET-000020-NDM-000019	SRG-NET-000020-NDM-000019_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 objects, 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. For network device, this control applies to communications with other network devices. These communications may include the central log aggregation server, software update server, router, and IPS. Non-explicit attributes may include MAC addresses or other easily changed device information. Source and destination objects may include but are not limited to, individual IP address, subnets, CIDR blocks, or address ranges.

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 objects, 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. For network device, this control applies to communications with other network devices. These communications may include the central log aggregation server, software update server, router, and IPS. Non-explicit attributes may include MAC addresses or other easily changed device information. Source and destination objects may include but are not limited to, individual IP address, subnets, CIDR blocks, or address ranges.

STIG	Date
Network Device Management Security Requirements Guide	2013-07-30

Details

Check Text ( C-SRG-NET-000020-NDM-000019_chk )
Examine the configuration on the network device. Verify source and destination objects (source and destination objects may include but are not limited to individual IP address, subnets, CIDR blocks, or address ranges) are used as a basis for information flow between the network device and other network devices. If non-explicit attributes are used for information flow control, this is a finding. If source and destination objects (source and destination objects may include but are not limited to, individual IP address, subnets, CIDR blocks or address ranges) are not used, this is a finding.

Check Text ( C-SRG-NET-000020-NDM-000019_chk )

Examine the configuration on the network device.
Verify source and destination objects (source and destination objects may include but are not limited to individual IP address, subnets, CIDR blocks, or address ranges) are used as a basis for information flow between the network device and other network devices.

If non-explicit attributes are used for information flow control, this is a finding. If source and destination objects (source and destination objects may include but are not limited to, individual IP address, subnets, CIDR blocks or address ranges) are not used, this is a finding.

Fix Text (F-SRG-NET-000020-NDM-000019_fix)
Configure the network configuration on the network device for communications with other network devices using source and destination objects (source and destination objects may include but are not limited to, individual IP address, subnets, CIDR blocks, or address ranges).