V-273669

Discussion

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. Such attacks can occur across a wide range of network protocols (e.g., IPv4, IPv6). A variety of technologies are available to limit or eliminate the origination and effects of DoS events. For example, boundary protection devices can filter certain types of packets to protect system components on internal networks from being directly affected by or the source of DoS attacks. Employing increased network capacity and bandwidth combined with service redundancy also reduces the susceptibility to DoS events.

Check Content

Review configuration to determine whether distributed denial-of-service (DDoS) attack prevention is configured (values may vary):

ICX#show running-config | include burst
ip icmp attack-rate burst-normal 500 burst-max 1000 lockup 300
ip tcp burst-normal 30 burst-max 100 lockup 300

If DSCP trust is required, verify it has been applied to the necessary interfaces.

ICX# show running-config interface ethernet x/x/x

interface ethernet x/x/x
  trust dscp

If DDoS protection is not configured or Differentiated Services Code Point (DSCP) trust is required but not configured, this is a finding.