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| Certification Vendor: | Linux Foundation |
|---|---|
| Exam Name: | Certified Kubernetes Security Specialist (CKS) Exam |
| Exam Number: | CKS |
| Real Exam Qty: | Performance-based tasks (no fixed number) |
| Passing Score: | Not publicly disclosed |
| Exam Price: | USD 395 |
| Exam Format: | Performance-based exam, Hands-on lab (Kubernetes environment), Terminal-based tasks |
| Certificate Validity Period: | 2 years |
| Exam Duration: | 120 minutes |
| Available Languages: | English |
| Related Certifications: | Certified Kubernetes Application Developer (CKAD) Certified Kubernetes Administrator (CKA) |
| Recommended Training: | Kubernetes Security Essentials (Linux Foundation Training) CKS Exam Preparation Course |
| Exam Registration: | Linux Foundation Certification Page Linux Foundation Candidate Handbook |
| Sample Questions: | Linux Foundation CKS Sample Questions |
| Exam Way: | Online, proctored, remote performance-based exam |
| Pre Condition: | Valid Certified Kubernetes Administrator (CKA) certification is required |
| Official Syllabus URL: | https://training.linuxfoundation.org/certification/certified-kubernetes-security-specialist/ |
This is a Linux Foundation CKS practice exam software for Windows computers. This CKS practice test will be similar to the actual Certified Kubernetes Security Specialist (CKS) (CKS) exam. If user wish to test the Linux Foundation CKS study material before joining BraindumpQuiz, they may do so with a free sample trial. This CKS Exam simulation software can be readily installed on Windows-based computers and laptops. Since it is desktop-based Linux Foundation CKS practice exam software, it is not necessary to connect to the internet to use it.
The CKS exam is currently available online, and candidates have two hours to complete 15-20 hands-on lab tasks. CKS exam covers a range of topics, including Kubernetes cluster hardening, RBAC implementation, securing Kubernetes networking, securing container images, pod security policies, and monitoring Kubernetes clusters.
Linux Foundation CKS (Certified Kubernetes Security Specialist) Exam is a certification program that is designed to assess and validate an individual's expertise in securing container-based applications and Kubernetes platforms. CKS Exam is aimed at professionals who are responsible for securing Kubernetes clusters and ensuring that they are in compliance with industry-recognized security standards. The CKS certification program is a vendor-neutral program that is open to all IT professionals who have a good understanding of Kubernetes and its security principles.
NEW QUESTION # 38
You are running a multi-tenant Kubernetes cluster where different teams manage their own applications. You want to ensure that each team's applications are isolated from each other to prevent potential security risks.
How would you use Network Policies to achieve this isolation?
Answer:
Explanation:
Solution (Step by Step) :
1. Create separate namespaces for each team: This is the foundation for network isolation.
2. Define Network Policies for each namespace:
Restrict inbound traffic: Only allow specific protocols and ports from trusted sources to access the namespace.
Control outbound traffic: Limit outbound connections from pods within the namespace to specific destinations.
Example Network Policy (ingress):
3. Apply the Network Policies: bash kubectl apply -f team-a-ingress-yaml kubectl apply -f team-b-ingress.yaml # Apply policies for other namespaces Example Scenario: Team A: Runs a web application accessible only from within its namespace. Team B: Runs a database service that can be accessed by Team A's application but not by other teams. Network Policies: Team A Network Policy: Ingress: Only allow traffic from Team B's database service- Egress Allow outbound traffic to the internet for updates and dependencies. Team B Network Policy: Ingress: Allow traffic from Team A's web application Egress Limit outbound traffic to specific servers for backups and maintenance. Note: Network Policies are a powerful tool for achieving network isolation in Kubernetes. They allow you to fine-tune the communication patterns between pods and namespaces, enhancing security and mitigating potential risks.
NEW QUESTION # 39
You can switch the cluster/configuration context using the following command: [desk@cli] $ kubectl config use-context dev A default-deny NetworkPolicy avoid to accidentally expose a Pod in a namespace that doesn't have any other NetworkPolicy defined.
Task: Create a new default-deny NetworkPolicy named deny-network in the namespace test for all traffic of type Ingress + Egress The new NetworkPolicy must deny all Ingress + Egress traffic in the namespace test.
Apply the newly created default-deny NetworkPolicy to all Pods running in namespace test.
You can find a skeleton manifests file at /home/cert_masters/network-policy.yaml
Answer:
Explanation:
master1 $ k get pods -n test --show-labels
NAME READY STATUS RESTARTS AGE LABELS
test-pod 1/1 Running 0 34s role=test,run=test-pod
testing 1/1 Running 0 17d run=testing
$ vim netpol.yaml
apiVersion: networking.k8s.io/v1
kind: NetworkPolicy
metadata:
name: deny-network
namespace: test
spec:
podSelector: {}
policyTypes:
- Ingress
- Egress
master1 $ k apply -f netpol.yaml
Explanation
controlplane $ k get pods -n test --show-labels
NAME READY STATUS RESTARTS AGE LABELS
test-pod 1/1 Running 0 34s role=test,run=test-pod
testing 1/1 Running 0 17d run=testing
master1 $ vim netpol1.yaml
apiVersion: networking.k8s.io/v1
kind: NetworkPolicy
metadata:
name: deny-network
namespace: test
spec:
podSelector: {}
policyTypes:
- Ingress
- Egress
master1 $ k apply -f netpol1.yaml Reference: https://kubernetes.io/docs/concepts/services-networking/network-policies/ Explanation controlplane $ k get pods -n test --show-labels NAME READY STATUS RESTARTS AGE LABELS test-pod 1/1 Running 0 34s role=test,run=test-pod testing 1/1 Running 0 17d run=testing master1 $ vim netpol1.yaml apiVersion: networking.k8s.io/v1 kind: NetworkPolicy metadata:
name: deny-network
namespace: test
spec:
podSelector: {}
policyTypes:
- Ingress
- Egress
master1 $ k apply -f netpol1.yaml Reference: https://kubernetes.io/docs/concepts/services-networking/network-policies/
NEW QUESTION # 40
You are working on a Kubernetes cluster that hosts a critical microservices application. You have identified that the application is vulnerable to a known attack vector through a specific service called "payment-service." You need to quickly implement a security measure to mitigate this attack vector while minimizing the impact on other services.
How can you use a network policy to isolate the "payment-service" from the rest of the cluster and prevent the attack without disrupting the normal functioning of other microservices?
Answer:
Explanation:
Solution (Step by Step) :
1. Identify the specific traffic flows:
- Analyze the network traffic of the "payment-service" to understand the communication patterns it uses.
- Determine which services are essential for the "payment-service" to operate correctly.
- Identify the specific ports and protocols used by the "payment-service" to communicate with those services.
2. Define the network policy:
- Create a network policy specifically for the "payment-service."
- Allow only the necessary traffic flows to and from the "payment-service."
- Block any other traffic, including potential attack vectors.
3. Deploy and test the policy:
- Apply the network policy to the cluster.
- Monitor the "payment-service" closely to ensure it continues to operate correctly.
- Test the policy with simulated attacks to confirm its effectiveness.
Example Network Policy:
This policy allows the "payment-service" to communicate only With "order-service" and "database" services while blocking all other traffic. This allows the service to continue operating normally while isolating it from the rest of the cluster and mitigating the potential attack vector.
NEW QUESTION # 41
You are building a custom Kubernetes distribution for your organization- Establish a secure process for building and verifying the integrity of the Kubernetes binaries included in your distribution.
Answer:
Explanation:
Solution (Step by Step):
1. Build Kubernetes from source: Build the Kubernetes binaries from the official source code repository (httpswgithub.com/kubernetes/kubernetesl
(https://wwwgoogle.com/url?sa=E&source=gmail&q=https://github.com/kubernetes/kubernetes))- Use a clean build environment and a trusted source for the source code.
2. Implement reproducible builds: Use a build system that supports reproducible builds, such as Bazel or Buildah- This ensures that the same source code always produces the same binary output.
3. Generate and verify checksums: Generate SHA-256 checksums for all built binaries and store them securely. Verity the checksums of the binaries before including them in your distribution.
4. Sign the binaries: Use a code signing certificate to sign the binaries. This allows users to verify the authenticity and integrity of the binaries-
5. Publish the binaries and signatures: Publish the binaries and corresponding signatures in a secure repository. Provide clear instructions for users to
verify the signatures before using the binaries-
6. Use a trusted CI/CD system: use a trusted and secure CI/CD system to automate the build and verification process. This helps to ensure the integrity and security of the build pipeline.
NEW QUESTION # 42
Enable audit logs in the cluster, To Do so, enable the log backend, and ensure that
1. logs are stored at /var/log/kubernetes-logs.txt.
2. Log files are retained for 12 days.
3. at maximum, a number of 8 old audit logs files are retained.
4. set the maximum size before getting rotated to 200MB
Edit and extend the basic policy to log:
1. namespaces changes at RequestResponse
2. Log the request body of secrets changes in the namespace kube-system.
3. Log all other resources in core and extensions at the Request level.
4. Log "pods/portforward", "services/proxy" at Metadata level.
5. Omit the Stage RequestReceived
All other requests at the Metadata level
Answer:
Explanation:
Kubernetes auditing provides a security-relevant chronological set of records about a cluster. Kube-apiserver performs auditing. Each request on each stage of its execution generates an event, which is then pre-processed according to a certain policy and written to a backend. The policy determines what's recorded and the backends persist the records.
You might want to configure the audit log as part of compliance with the CIS (Center for Internet Security) Kubernetes Benchmark controls.
The audit log can be enabled by default using the following configuration in cluster.yml:
services:
kube-api:
audit_log:
enabled: true
When the audit log is enabled, you should be able to see the default values at /etc/kubernetes/audit-policy.yaml The log backend writes audit events to a file in JSONlines format. You can configure the log audit backend using the following kube-apiserver flags:
--audit-log-path specifies the log file path that log backend uses to write audit events. Not specifying this flag disables log backend. - means standard out
--audit-log-maxage defined the maximum number of days to retain old audit log files
--audit-log-maxbackup defines the maximum number of audit log files to retain
--audit-log-maxsize defines the maximum size in megabytes of the audit log file before it gets rotated If your cluster's control plane runs the kube-apiserver as a Pod, remember to mount the hostPath to the location of the policy file and log file, so that audit records are persisted. For example:
--audit-policy-file=/etc/kubernetes/audit-policy.yaml \
--audit-log-path=/var/log/audit.log
NEW QUESTION # 43
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