ONTAP must be configured to prohibit the use of all unnecessary and/or nonsecure functions, ports, protocols, and/or services.

In order to prevent unauthorized connection of devices, unauthorized transfer of information, or unauthorized tunneling (i.e., embedding of data types within data types), organizations must disable unused or unnecessary physical and logical ports/protocols on information systems.

Network devices are capable of providing a wide variety of functions and services. Some of the functions and services provided by default may not be necessary to support essential organizational operations. Additionally, it is sometimes convenient to provide multiple services from a single component (e.g., email and web services); however, doing so increases risk over limiting the services provided by any one component.

To support the requirements and principles of least functionality, the network device must support the organizational requirements providing only essential capabilities and limiting the use of ports, protocols, and/or services to only those required, authorized, and approved. Some network devices have capabilities enabled by default; if these capabilities are not necessary, they must be disabled. If a particular capability is used, then it must be documented and approved.

Use "network interface service-policy show" to see all of the configured service policies defined in ONTAP.

Use "network interface show -fields service-policy" to see which network logical interfaces (LIFs) have which service policies configured.

If ONTAP does not have service policies defined for each interface, this is a finding.

Configure logical interfaces to use service policies with "network interface modify -service-policy <service_policy_name> -lif <logical_interface_name>".