SI — SYSTEM AND INFORMATION INTEGRITY
SI-8: SPAM PROTECTION
NIST 800-53R4 Membership SI-8:
- a. Employs spam protection mechanisms at information system entry and exit points to detect and take action on unsolicited messages; and
- b. Updates spam protection mechanisms when new releases are available in accordance with organizational configuration management policy and procedures.
Information system entry and exit points include, for example, firewalls, electronic mail servers, web servers, proxy servers, remote-access servers, workstations, mobile devices, and notebook/laptop computers. Spam can be transported by different means including, for example, electronic mail, electronic mail attachments, and web accesses. Spam protection mechanisms include, for example, signature definitions.
RELATED CONTROLS: SI-8
SI-8 (1) SPAM PROTECTION | CENTRAL MANAGEMENT
NIST 800-53R4 Membership SI-8 (1):
The organization centrally manages spam protection mechanisms.
Central management is the organization-wide management and implementation of spam protection mechanisms. Central management includes planning, implementing, assessing, authorizing, and monitoring the organization-defined, centrally managed spam protection security controls.
RELATED CONTROLS: SI-8 (1)
SI-8 (2) SPAM PROTECTION | AUTOMATIC UPDATES
NIST 800-53R4 Membership SI-8 (2):
The information system automatically updates spam protection mechanisms.
Supplemental Guidance: NONE
SI-8 (3) SPAM PROTECTION | CONTINUOUS LEARNING CAPABILITY
The information system implements spam protection mechanisms with a learning capability to more effectively identify legitimate communications traffic.
Learning mechanisms include, for example, Bayesian filters that respond to user inputs identifying specific traffic as spam or legitimate by updating algorithm parameters and thereby more accurately separating types of traffic.
- NIST Special Publication 800-45