Kubernetes Network Policy use cases
One recommended practice for a secure Kubernetes configuration is to use Network Policies. They stop Pod network access from being overly widespread in situations like these:
- Permit particular applications or namespaces to talk to one another: The main method for segregating objects connected to various apps, teams, and environments is to use Kubernetes namespaces. To strengthen multi-tenancy and network-isolate these resources, you can employ Network Policies.
- Making sure an app’s database can only be accessed by that app Kubernetes databases are frequently designed so that other in-cluster pods, like the ones that manage the backend of your app, are the only ones that can access them. You can enforce this restriction by using network policies, which will stop other applications from interacting with your database server.
- Implement a deny-all policy first: Begin by blocking all network traffic, then progressively permit only the traffic that is identified as necessary. By doing this, the attack surface is decreased and the chance of a security breach is decreased.
- Employ network segmentation: Utilize network segmentation to split the network into more manageable sections and restrict traffic flow between them. By doing this, the attack surface is decreased and the chance of a data breach is decreased.
- Isolating Pods from your cluster’s network: Some sensitive Pods might not need to accept any inbound traffic from other Pods in your cluster. Using a Network Policy to block all Ingress traffic to them will tighten your workload’s security.
You may effectively use Kubernetes Network Policy to enhance your Kubernetes cluster’s security and lower the likelihood of a security breach by adhering to these best practices.
kubernetes Network Policlies
Everyone agrees that Kubernetes clusters are insecure by default. But the good news is that Kubernetes provides the tools to make that happen. In this article, we’re going to learn about one of the resources that K8s provides straight out of the box to help make your deployed apps more secure: Network policies.
A Kubernetes network policy specifies how pods can communicate with one another and other network endpoints in a Kubernetes cluster. Network policies provide fine-grained control over network traffic, allowing you to partition your network and secure your applications. They allow you to set incoming and outgoing traffic rules for pods and are implemented in the Kubernetes cluster using a CNI plugin like Calico or Weave Net.