The NSX Tier-0 Gateway Firewall must manage excess bandwidth to limit the effects of packet flooding types of denial-of-service (DoS) attacks.
An XCCDF Rule
Description
<VulnDiscussion>A firewall experiencing a DoS attack will not be able to handle production traffic load. The high usage and CPU caused by a DoS attack will also have an effect on control keep-alives and timers used for neighbor peering resulting in route flapping and will eventually black hole production traffic. The device must be configured to contain and limit a DoS attack's effect on the device's resource usage. The use of redundant components and load balancing are examples of mitigating "flood-type" DoS attacks through increased capacity.</VulnDiscussion><FalsePositives></FalsePositives><FalseNegatives></FalseNegatives><Documentable>false</Documentable><Mitigations></Mitigations><SeverityOverrideGuidance></SeverityOverrideGuidance><PotentialImpacts></PotentialImpacts><ThirdPartyTools></ThirdPartyTools><MitigationControl></MitigationControl><Responsibility></Responsibility><IAControls></IAControls>
- ID
- SV-263279r977604_rule
- Severity
- High
- References
- Updated
Remediation - Manual Procedure
To create a new Flood Protection profile, do the following:
From the NSX Manager web interface, go to Security >> Settings >> General Settings >> Firewall >> Flood Protection >> Add Profile >> Add Edge Gateway Profile.
Enter a name and specify appropriate values for the following: TCP Half Open Connection limit, UDP Active Flow Limit, ICMP Active Flow Limit, and Other Active Connection Limit.