The NSX Tier-1 Gateway router must be configured to have all inactive interfaces removed.
An XCCDF Rule
Description
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.
- ID
- SV-265518r999924_rule
- Version
- NT1R-4X-000016
- Severity
- High
- References
- Updated
Remediation Templates
A Manual Procedure
To remove a stale linked segment from a Tier-1 Gateway, do the following:
From the NSX Manager web interface, go to Networking >> Connectivity >> Segments and edit the target segment.
Under Connected Gateway, change to "None" and click "Save".