Assessment Objectives

In addition to relevant policies, standards and procedures, the assessor shall examine, interview, and/or test to determine if appropriately scoped evidence exists to support the claim that:

• NET-21_A01 types of denial-of-service events to be protected against or limited are defined.
  Defined parameters: at a minimum, ICMP (ping) flood, SYN flood, slowloris, buffer overflow attack, and volume attack
  Assessment rigor: 1
  Origin: 53A_R5_SC-05_ODP[01] 53A_R5_SC-05(01)_ODP
• NET-21_A02 resource prioritization is designed to limit negative effects of denial-of-service events.
  Assessment rigor: 1
  Origin: 53A_R5_SC-05_ODP[02]
• NET-21_A03 controls to achieve the denial-of-service objective by type of denial-of-service event are defined.
  Assessment rigor: 1
  Origin: 53A_R5_SC-05_ODP[03]
• NET-21_A04 controls by type of denial-of-service event are employed to achieve the denial-of-service protection objective.
  Assessment rigor: 1
  Origin: 53A_R5_SC-05b.
• NET-21_A05 the ability of individuals to launch denial-of-service attacks against other systems is restricted.
  Assessment rigor: 3
  Origin: 53A_R5_SC-05(01)
• NET-21_A06 the effects of types of denial-of-service events are organizationally-defined.
  Assessment rigor: 3
  Origin: 53A_R5_SC-05a.
• NET-21_A07 capacity, bandwidth or other redundancies to limit the effects of information flooding denial-of-service attacks are managed.
  Assessment rigor: 3
  Origin: 53A_R5_SC-05(02)
• NET-21_A08 monitoring tools for detecting indicators of denial-of-service attacks are defined.
  Assessment rigor: 3
  Origin: 53A_R5_SC-05(03)_ODP[01]
• NET-21_A09 system resources to be monitored to determine if sufficient resources exist to prevent effective denial-of-service attacks are defined.
  Assessment rigor: 3
  Origin: 53A_R5_SC-05(03)_ODP[02]
• NET-21_A10 monitoring tools are employed to detect indicators of denial-of-service attacks against or launched from the system.
  Assessment rigor: 3
  Origin: 53A_R5_SC-05(03)(a)
• NET-21_A11 system resources are monitored to determine if sufficient resources exist to prevent effective denial-of-service attacks.
  Assessment rigor: 3
  Origin: 53A_R5_SC-05(03)(b)

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