II - Mission Support Sensitive
Rules and Groups employed by this XCCDF Profile
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SRG-NET-000392
Group -
The firewall must generate an alert that can be forwarded to, at a minimum, the ISSO and ISSM when denial-of-service (DoS) incidents are detected.
Without an alert, security personnel may be unaware of major detection incidents that require immediate action, and this delay may result in the loss or compromise of information. The firewall gen...Rule Low Severity -
SRG-NET-000492
Group -
The firewall must generate traffic log records when traffic is denied, restricted, or discarded.
Without generating log records that log usage of objects by subjects and other objects, it would be difficult to establish, correlate, and investigate the events relating to an incident or identify...Rule Medium Severity -
SRG-NET-000493
Group -
The firewall must generate traffic log records when attempts are made to send packets between security zones that are not authorized to communicate.
Without generating log records that are specific to the security and mission needs of the organization, it would be difficult to establish, correlate, and investigate the events relating to an inci...Rule Medium Severity -
SRG-NET-000364
Group -
The firewall must be configured to inspect all inbound and outbound traffic at the application layer.
Application inspection enables the firewall to control traffic based on different parameters that exist within the packets such as enforcing application-specific message and field length. Inspectio...Rule Medium Severity -
SRG-NET-000364
Group -
The firewall must be configured to inspect all inbound and outbound IPv6 traffic for unknown or out-of-order extension headers.
IPv6 packets with unknown extension headers as well as out-of-order headers can create denial-of-service attacks for other networking components as well as host devices. IPv6 inspection can check c...Rule Medium Severity -
SRG-NET-000364
Group -
The firewall must be configured to restrict it from accepting outbound packets that contain an illegitimate address in the source address field via an egress filter or by enabling Unicast Reverse Path Forwarding (uRPF).
A compromised host in an enclave can be used by a malicious platform to launch cyberattacks on third parties. This is a common practice in "botnets", which are a collection of compromised computers...Rule Medium Severity -
SRG-NET-000705
Group -
The firewall must be configured to employ organization-defined controls by type of denial-of-service (DoS) to achieve the DoS objective.
DoS events may occur due to a variety of internal and external causes, such as an attack by an adversary or a lack of planning to support organizational needs with respect to capacity and bandwidth...Rule Medium Severity -
SRG-NET-000715
Group -
The firewall must be configured to implement physically or logically separate subnetworks to isolate organization-defined critical system components and functions.
Separating critical system components and functions from other noncritical system components and functions through separate subnetworks may be necessary to reduce susceptibility to a catastrophic o...Rule Medium Severity -
SRG-NET-000760
Group -
The firewall must be configured to establish organization-defined alternate communications paths for system operations organizational command and control.
An incident, whether adversarial- or nonadversarial-based, can disrupt established communications paths used for system operations and organizational command and control. Alternate communications p...Rule Medium Severity
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