1.6.4 Create network segmentation using Network Policies

Information

Use network policies to isolate your cluster network.

Rationale:

Running different applications on the same Kubernetes cluster creates a risk of one compromised application attacking a neighboring application. Network segmentation is important to ensure that containers can communicate only with those they are supposed to. A network policy is a specification of how selections of pods are allowed to communicate with each other and other network endpoints. `NetworkPolicy` resources use labels to select pods and define whitelist rules which allow traffic to the selected pods in addition to what is allowed by the isolation policy for a given namespace.

NOTE: Nessus has provided the target output to assist in reviewing the benchmark to ensure target compliance.

Solution

Follow the documentation and create `NetworkPolicy` objects as you need them.

Impact:

You need a networking solution which supports `NetworkPolicy` - simply creating the resource without a controller to implement it will have no effect.

See Also

https://workbench.cisecurity.org/files/1738

Item Details

Category: SYSTEM AND COMMUNICATIONS PROTECTION

References: 800-53|SC-7(21), CSCv6|14.1

Plugin: Unix

Control ID: a5afdb8b564d9b406bab979d1ffbdde5c01eee76f07600f26fbc0931037bdddb