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To assist applicants preparing for the Certified Kubernetes Security Specialist (CKS) (CKS) real certification exam effectively, TopExamCollection offers Linux Foundation CKS desktop practice test software and a web-based practice exam besides actual PDF CKS exam questions. These CKS Practice Exams replicate the Linux Foundation CKS real exam scenario and offer a trusted evaluation of your preparation. No internet connection is necessary to use the CKS Windows-based practice test software.
The CKS certification exam covers a range of security-related topics, including container security, Kubernetes API security, network security, access control, auditing and logging, and more. Candidates must have a solid understanding of Kubernetes security concepts, including how to secure Kubernetes deployments, implement security policies, and manage security risks. They must also be able to demonstrate their ability to use Kubernetes security tools, such as kube-bench, kube-hunter, and others, to identify and mitigate security vulnerabilities. Overall, the CKS certification exam is an excellent way for professionals to enhance their Kubernetes security skills and demonstrate their expertise in this highly competitive field.
Linux Foundation CKS Certification is an advanced-level certification for Kubernetes administrators who want to demonstrate their expertise in securing container-based applications and Kubernetes platforms. It is a performance-based exam that evaluates the candidate's ability to secure a Kubernetes cluster using industry best practices. Obtaining the CKS certification can help you stand out in a competitive job market and demonstrate your commitment to staying up-to-date with the latest Kubernetes security trends and best practices.
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To prepare for the CKS Exam, candidates are recommended to have a strong understanding of Kubernetes architecture and concepts, as well as a comprehensive knowledge of security best practices. The Linux Foundation offers a variety of training courses and resources to help candidates prepare for the exam, including online courses, study guides, and practice exams. Additionally, candidates are encouraged to gain hands-on experience working with Kubernetes clusters and implementing security measures in real-world environments.
NEW QUESTION # 18
use the Trivy to scan the following images,
1. amazonlinux:1
2. k8s.gcr.io/kube-controller-manager:v1.18.6
Look for images with HIGH or CRITICAL severity vulnerabilities and store the output of the same in /opt/trivy-vulnerable.txt
Answer: A
NEW QUESTION # 19
You have a Kubernetes cluster running a critical application With a Deployment named 'critical-app-deployment' . This deployment uses a container image from a private registry hosted on a separate server. You want to secure the communication between your Kubernetes cluster and the private registry to prevent unauthorized access to your sensitive container images.
Explain how you would secure this communication using TLS/SSL certificates and describe the steps involved in configuring it.
Answer:
Explanation:
Solution (Step by Step) :
1. Generate a Self-Signed Certificate:
use OpenSSL to create a certificate and a private key:
bash
openssl req -x509 -newkey rsa:2048 -keyout server-key -out server.cn -days 365 -nodes
Replace the prompts with appropriate values for your registry server: CommonName, Organizational Unit Name, etc.
2. Configure the Registry Server:
Enable TLS/SSL: Configure the registry server to listen on HTTPS using the generated certificate and key.
Example configuration (Docker Registry):
[service "registry"]
# other configuration .
tls = true
tls_certiticate =
tls_key = "/path/to/server.key"
3. Configure Kubernetes:
Add the certificate to the Kubernetes cluster:
Create a Kubernetes Secret to store the certificate and key:
Configure the ImagePullSecret: UPdate the Deployment to use the secret
4. Verify the Configuration: Test image pulls from the deployment: Ensure that the containers can pull images from the registry using HTTPS. Verify the certificate and key are properly loaded: Use tools like 'kubectl describe secret registry-secret to confirm the secret contents. Note: This is a simplified setup for self-signed certificates. For a production environment, consider using a trusted Certificate Authority (CA) to issue certificates for enhanced security.
NEW QUESTION # 20
SIMULATION
A container image scanner is set up on the cluster.
Given an incomplete configuration in the directory
/etc/kubernetes/confcontrol and a functional container image scanner with HTTPS endpoint https://test-server.local.8081/image_policy
1. Enable the admission plugin.
2. Validate the control configuration and change it to implicit deny.
Finally, test the configuration by deploying the pod having the image tag as latest.
Answer: A
NEW QUESTION # 21
SIMULATION
You must connect to the correct host . Failure to do so may
result in a zero score.
[candidato@base] $ ssh cks000023
Task
Analyze and edit the Dockerfile located at /home/candidate/subtle-bee/build/Dockerfile, fixing one instruction present in the file that is a prominent security/best-practice issue.
Do not add or remove instructions; only modify the one existing instruction with a security/best-practice concern.
Do not build the Dockerfile, Failure to do so may result in running out of storage and a zero score.
Analyze and edit the given manifest file /home/candidate/subtle-bee/deployment.yaml, fixing one fields present in the file that are a prominent security/best-practice issue.
Do not add or remove fields; only modify the one existing field with a security/best-practice concern.
Should you need an unprivileged user for any of the tasks, use user nobody with user ID 65535.
Answer:
Explanation:
See the Explanation below for complete solution
Explanation:
0) Connect to the correct host
ssh cks000023
sudo -i
PART A - Fix ONE prominent Dockerfile security/best-practice issue
1) Open the Dockerfile
vi /home/candidate/subtle-bee/build/Dockerfile
2) Find the "most obvious" security/best-practice problem and modify ONLY THAT ONE instruction Use / search in vi to quickly find candidates:
Candidate 1 (very common): USER root (or no USER but a USER 0)
Search:
/USER
If you see:
USER root
Change that single instruction to:
USER 65535
(or USER nobody if that exact word is already used in the file-but the task explicitly allows UID 65535, so USER 65535 is safest.)
✅ This is one-instruction change and is a top-tier best practice.
Candidate 2 (very common): FROM <image>:latest
Search:
/FROM
If you see something like:
FROM nginx:latest
Change ONLY that line to a pinned tag (example):
FROM nginx:1.25.5
(Any non-latest pinned version is the point. Don't add a digest line; just modify the existing FROM line.) Candidate 3: ADD http://... (remote URL download) Search:
/ADD
If you see remote URL usage like:
ADD https://example.com/app.tar.gz /app/
Change that single instruction to COPY only if it's copying local files.
If it's a remote URL, the more "correct" fix would normally be using curl with verification, but that would require adding instructions (not allowed).
So in this exam constraint, do NOT pick this unless it's actually a local add like:
ADD . /app
Then change just the word:
COPY . /app
3) Save and exit
:wq
Don't run docker build (task forbids building).
PART B - Fix ONE prominent security/best-practice issue in the Deployment manifest
4) Open the manifest
vi /home/candidate/subtle-bee/deployment.yaml
5) Change ONLY ONE existing field that is a clear security issue
Use / search in vi for the usual "bad fields":
Option 1 (most common): running as root
Search:
/runAsUser
If you see:
runAsUser: 0
Change that one existing field value to:
runAsUser: 65535
✅ This is a single-field change and matches the prompt hint.
Option 2: privileged container
Search:
/privileged
If you see:
privileged: true
Change only that value to:
privileged: false
Option 3: allow privilege escalation
Search:
/allowPrivilegeEscalation
If you see:
allowPrivilegeEscalation: true
Change only that value to:
allowPrivilegeEscalation: false
Option 4: writable root filesystem
Search:
/readOnlyRootFilesystem
If you see:
readOnlyRootFilesystem: false
Change only that value to:
readOnlyRootFilesystem: true
Option 5: image uses :latest
Search:
/image:
If you see:
image: something:latest
Change only that value to a pinned tag, e.g.:
image: something:1.2.3
6) Save and exit
:wq
What to pick (fast decision rule)
If you see run as root in either file, that's usually the highest scoring / most "prominent" security issue.
Dockerfile: USER root → USER 65535
Deployment: runAsUser: 0 → runAsUser: 65535
Those are perfect because you only modify one line/field and it matches the hint.
NEW QUESTION # 22
You have an Nginx pod deployed in your Kubernetes cluster. You need to set up a PodSecurityPolicy (PSP) that allows the Nginx pod to access only specific network ports and disallows it from accessing other ports. Describe the steps you would take to implement this PSP.
Answer:
Explanation:
Solution (Step by Step) :
1. Create PodSecurityPolicy (PSP):
- Define a PodSecurityPolicy (PSP) YAML file. This file will restrict the Nginx pod's network access.
- For example, you could define a PSP that allows the Nginx pod to access ports 80 and 443 (HTTP and HTTPS) but restricts access to all other ports:
2. Apply the PSPI - Apply the PSP YAML file using 'kubectl apply -f nginx-psp.yaml' 3. Bind the PSP to the Nginx Pod: - Update the Nginx deployment or pod definition to include the 'securityContext' field with a reference to the created PSP:
4. Verify the psp: - Check that the Nginx pod is using the PSP by running 'kubectl describe pod ' . You should see the PSP name listed in the "Security Context" section. 5. Test Access: - Verity that the Nginx pod can access ports 80 and 443 but not other ports. You can use tools like 'telnet or 'nc' to test connectivity.
NEW QUESTION # 23
......
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