The NSX Tier-0 Gateway router must be configured to have all inactive interfaces removed.
An XCCDF Rule
Description
<VulnDiscussion>An inactive interface is rarely monitored or controlled and may expose a network to an undetected attack on that interface. Unauthorized personnel with access to the communication facility could gain access to a router by connecting to a configured interface that is not in use. If an interface is no longer used, the configuration must be deleted and the interface disabled. For sub-interfaces, delete sub-interfaces that are on inactive interfaces and delete sub-interfaces that are themselves inactive. If the sub-interface is no longer necessary for authorized communications, it must be deleted.</VulnDiscussion><FalsePositives></FalsePositives><FalseNegatives></FalseNegatives><Documentable>false</Documentable><Mitigations></Mitigations><SeverityOverrideGuidance></SeverityOverrideGuidance><PotentialImpacts></PotentialImpacts><ThirdPartyTools></ThirdPartyTools><MitigationControl></MitigationControl><Responsibility></Responsibility><IAControls></IAControls>
- ID
- SV-263299r977664_rule
- Severity
- High
- References
- Updated
Remediation - Manual Procedure
Remove unused interfaces by doing the following:
From the NSX Manager web interface, go to Networking >> Connectivity >> Tier-0 Gateways and expand the target Tier-0 gateway.
Expand "Interfaces and GRE Tunnels", then click on the number of interfaces present to open the interfaces dialog.