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| Section | Weight | Objectives |
|---|---|---|
| Supply Chain Security | 20% | - Secure CI/CD practices - Image scanning and verification |
| Minimizing Microservice Vulnerabilities | 20% | - Container isolation and security contexts - Pod security standards |
| System Hardening | 15% | - Kernel and node security configuration - Host security controls |
| Cluster Setup | 15% | - Hardening cluster components - Secure installation configuration |
| Cluster Hardening | 15% | - Authentication and authorization - API server security |
| Monitoring, Logging and Runtime Security | 15% | - Runtime threat detection - Audit logging and monitoring |
>> CKS Prüfungsinformationen <<
Vielleicht haben Sie auch andere ähnliche Trainingsinstrumente für die Linux Foundation CKS Zertifizierungsprüfung auf anderen Websites gesehen. Aber unser EchteFrage stellt eine wichtige Position im Bereich der IT-Zertifizierungsprüfung dar. Mit den wissenschaftlichen Materialien von EchteFrage garantieren wir Ihnen , die CKS Prüfung 100% zu bestehen. Mit EchteFrage wird sich Ihre Karriere ändern. Sie können sich erfolgreich in der IT-Branche befördert werden. Wenn Sie EchteFrage wählen, wissen Sie schon, dass Sie sich schon gut auf die Linux Foundation CKS Zertifizierungsprüfung vorbereitet haben. Wir werden Ihnen nicht nur dabei helfen, die Prüfung erfolgreich zu bestehen, sondern auch Ihnen einen einjährigen Update-Service kostenlos bieten.
64. Frage
You have a Kubernetes cluster with a service account named 'default. This service account is used by multiple applications within the cluster, each requiring different access levels. Currently, 'default' has broad permissions, granting it access to manage deployments, secrets, and even perform cluster-wide operations. This poses a security risk.
How would you implement a strategy to restrict 'default's access to a minimal set of permissions while maintaining functionality for existing applications? Ensure you are using a principle of least privilege approach and demonstrate how you would test your implementation.
Antwort:
Begründung:
Solution (Step by Step) :
1. Identify and Separate Service Accounts:
- Determine the minimum set of permissions required by each application using the 'default service account.
- Create new service accounts with specific names (e.g., 'appl-sa', 'app2-sa', etc.) for each application.
2. Restrict 'default' Service Account:
- Remove unnecessary permissions from the 'default' service account.
- For example, you can restrict it to access only specific namespaces, specific resources within those namespaces, or specific operations on those resources.
3. Bind Service Accounts to Roles: - Create RoleBindings tnat associate the newly created service accounts with their respective roles.
4. Test Implementation: - Update your application deployments to use the new, restricted service accounts. - Run your applications and verify that they can access the resources they need but are prevented from unauthorized actions.
65. Frage
SIMULATION
Context
A default-deny NetworkPolicy avoids to accidentally expose a Pod in a namespace that doesn't have any other NetworkPolicy defined.
Task
Create a new default-deny NetworkPolicy named defaultdeny in the namespace testing for all traffic of type Egress.
The new NetworkPolicy must deny all Egress traffic in the namespace testing.
Apply the newly created default-deny NetworkPolicy to all Pods running in namespace testing.
Antwort:
Begründung:
See the Explanation below
Explanation:
66. Frage
You're working with a Kubernetes cluster where you need to enforce a secure supply chain. You have a Kubernetes deployment that utilizes a container image from a specific registry. How would you configure your Kubernetes cluster to only allow images from this registry to be used in deployments?
Antwort:
Begründung:
Solution (Step by Step) :
1. Create a PodSecurityPolicy (PSP):
- A PSP is a policy that enforces security restrictions on pods. We will use it to restrict image pulls to a specific registry.
- create a PSP YAML file.
2. Define Allowed Registries: - Within the 'spec' of your PSP, create a field 'seLinux' and then define the allowed registries within the 'seLinux' field. - Example:
3. Apply the PSP: - Apply the PSP to your cluster using kubectl apply -f restricted-registry-psp.yaml' 4. Create a Service Account: - Create a service account that will be allowed to run pods with this PSP:
5. Bind the PSP to the Service Account: - Add the 'securityContext' field to your deployment and specify the PSP you just created:
- Apply the deployment: bash kubectl apply -f deploymentyaml - Now, the deployment will only be able to pull images from the specified registry-
67. Frage
You can switch the cluster/configuration context using the following command: [desk@cli] $ kubectl config use-context dev Context: A CIS Benchmark tool was run against the kubeadm created cluster and found multiple issues that must be addressed. Task: Fix all issues via configuration and restart the affected components to ensure the new settings take effect. Fix all of the following violations that were found against the API server: 1.2.7 authorization-mode argument is not set to AlwaysAllow FAIL 1.2.8 authorization-mode argument includes Node FAIL 1.2.7 authorization-mode argument includes RBAC FAIL Fix all of the following violations that were found against the Kubelet: 4.2.1 Ensure that the anonymous-auth argument is set to false FAIL 4.2.2 authorization-mode argument is not set to AlwaysAllow FAIL (Use Webhook autumn/authz where possible) Fix all of the following violations that were found against etcd: 2.2 Ensure that the client-cert-auth argument is set to true
Antwort:
Begründung:
worker1 $ vim /var/lib/kubelet/config.yaml
anonymous:
enabled: true #Delete this
enabled: false #Replace by this
authorization:
mode: AlwaysAllow #Delete this
mode: Webhook #Replace by this
worker1 $ systemctl restart kubelet. # To reload kubelet config ssh to master1 master1 $ vim /etc/kubernetes/manifests/kube-apiserver.yaml - -- authorization-mode=Node,RBAC master1 $ vim /etc/kubernetes/manifests/etcd.yaml - --client-cert-auth=true Explanation ssh to worker1 worker1 $ vim /var/lib/kubelet/config.yaml apiVersion: kubelet.config.k8s.io/v1beta1 authentication:
anonymous:
enabled: true #Delete this
enabled: false #Replace by this
webhook:
cacheTTL: 0s
enabled: true
x509:
clientCAFile: /etc/kubernetes/pki/ca.crt
authorization:
mode: AlwaysAllow #Delete this
mode: Webhook #Replace by this
webhook:
cacheAuthorizedTTL: 0s
cacheUnauthorizedTTL: 0s
cgroupDriver: systemd
clusterDNS:
- 10.96.0.10
clusterDomain: cluster.local
cpuManagerReconcilePeriod: 0s
evictionPressureTransitionPeriod: 0s
fileCheckFrequency: 0s
healthzBindAddress: 127.0.0.1
healthzPort: 10248
httpCheckFrequency: 0s
imageMinimumGCAge: 0s
kind: KubeletConfiguration
logging: {}
nodeStatusReportFrequency: 0s
nodeStatusUpdateFrequency: 0s
resolvConf: /run/systemd/resolve/resolv.conf
rotateCertificates: true
runtimeRequestTimeout: 0s
staticPodPath: /etc/kubernetes/manifests
streamingConnectionIdleTimeout: 0s
syncFrequency: 0s
volumeStatsAggPeriod: 0s
worker1 $ systemctl restart kubelet. # To reload kubelet config ssh to master1 master1 $ vim /etc/kubernetes/manifests/kube-apiserver.yaml
master1 $ vim /etc/kubernetes/manifests/etcd.yaml
68. Frage
SIMULATION
Using the runtime detection tool Falco, Analyse the container behavior for at least 20 seconds, using filters that detect newly spawning and executing processes in a single container of Nginx.
store the incident file art /opt/falco-incident.txt, containing the detected incidents. one per line, in the format
[timestamp],[uid],[processName]
Antwort: A
69. Frage
......
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