The system must manage excess capacity, bandwidth, or other redundancy to limit the effects of information-flooding types of Denial of Service (DoS) attacks by enabling Network I/O Control (NIOC).

From VMware vSphere vCenter Server Version 6 Security Technical Implementation Guide

Part of SRG-APP-000516

Associated with: CCI-001095

SV-78441r2_rule The system must manage excess capacity, bandwidth, or other redundancy to limit the effects of information-flooding types of Denial of Service (DoS) attacks by enabling Network I/O Control (NIOC).

Vulnerability discussion

DoS is a condition when a resource is not available for legitimate users. When this occurs, the organization either cannot accomplish its mission or must operate at degraded capacity.Managing excess capacity ensures that sufficient capacity is available to counter flooding attacks. Employing increased capacity and service redundancy may reduce the susceptibility to some DoS attacks. Managing excess capacity may include, for example, establishing selected usage priorities, quotas, or partitioning.

Check content

From the vSphere Web Client go to Networking >> Select a distributed switch >> Manage >> Settings >> Properties. View the Properties pane and verify Network I/O Control is enabled. or From a PowerCLI command prompt while connected to the vCenter server run the following command: Get-VDSwitch | select Name,@{N="NIOC Enabled";E={$_.ExtensionData.config.NetworkResourceManagementEnabled}} If Network I/O Control is disabled, this is a finding.

Fix text

From the vSphere Web Client go to Networking >> Select a distributed switch >> Manage >> Settings >> Properties. In the Properties pane click "Edit" and change Network I/O Control to enabled. or From a PowerCLI command prompt while connected to the vCenter server run the following command: (Get-VDSwitch "DVSwitch Name" | Get-View).EnableNetworkResourceManagement($true)

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