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| Section | Weight | Objectives |
|---|---|---|
| Minimize Microservice Vulnerabilities | 20% | - Pod Security Standards - Security contexts - Isolation & multi-tenancy - OPA/Gatekeeper implementation - Secret management |
| Monitoring, Logging and Runtime Security | 20% | - Behavioral analytics - Audit log configuration - Threat detection (Falco) - Container immutability - Incident investigation |
| Cluster Hardening | 15% | - RBAC configuration - Component updates & vulnerability mitigation - API access restriction - Service account security |
| Cluster Setup | 15% | - Network security policies - Binary verification - CIS benchmark compliance - Secure Ingress configuration - Node metadata protection |
| Supply Chain Security | 20% | - Image security & scanning - Signed artifacts & verification - SBOM & CI/CD security - Static analysis tools - Permitted registries |
| System Hardening | 10% | - Kernel hardening (AppArmor, seccomp) - Minimize OS attack surface - Least privilege IAM - Network access control |
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NEW QUESTION # 37
SIMULATION
Context
For testing purposes, the kubeadm provisioned cluster 's API server
was configured to allow unauthenticated and unauthorized access.
Task
First, secure the cluster 's API server configuring it as follows:
. Forbid anonymous authentication
. Use authorization mode Node,RBAC
. Use admission controller NodeRestriction
The cluster uses the Docker Engine as its container runtime . If needed, use the docker command to troubleshoot running containers.
kubectl is configured to use unauthenticated and unauthorized access. You do not have to change it, but be aware that kubectl will stop working once you have secured the cluster .
You can use the cluster 's original kubectl configuration file located at etc/kubernetes/admin.conf to access the secured cluster.
Next, to clean up, remove the ClusterRoleBinding
system:anonymous.
Answer:
Explanation:
See the Explanation below for complete solution
Explanation:
1) SSH to control-plane node
ssh cks000002
sudo -i
2) Edit API Server static pod manifest
API server in kubeadm runs as a static pod.
vi /etc/kubernetes/manifests/kube-apiserver.yaml
3) Apply required API Server security settings
3.1 Forbid anonymous authentication
Find command: section and ensure this line exists:
- --anonymous-auth=false
3.2 Use authorization mode Node,RBAC
Ensure exactly this line exists (and no AlwaysAllow):
- --authorization-mode=Node,RBAC
❌ Remove if present:
- --authorization-mode=AlwaysAllow
3.3 Enable admission controller NodeRestriction
Find --enable-admission-plugins and ensure NodeRestriction is included.
Correct example:
- --enable-admission-plugins=NodeRestriction
If other plugins already exist, append NodeRestriction, e.g.:
- --enable-admission-plugins=NamespaceLifecycle,ServiceAccount,NodeRestriction
4) Save file and let kubelet restart API server
Just save and exit (:wq)
Kubelet will automatically restart the API server pod.
5) Switch kubectl to secured config
Current kubectl will stop working after API server hardening.
export KUBECONFIG=/etc/kubernetes/admin.conf
Verify access:
kubectl get nodes
6) Remove insecure ClusterRoleBinding
Delete system:anonymous binding:
kubectl delete clusterrolebinding system:anonymous
Verify removal:
kubectl get clusterrolebinding | grep anonymous
(no output = correct)
7) Quick validation (optional but fast)
API server flags check:
grep -n "anonymous-auth" /etc/kubernetes/manifests/kube-apiserver.yaml
grep -n "authorization-mode" /etc/kubernetes/manifests/kube-apiserver.yaml grep -n "NodeRestriction" /etc/kubernetes/manifests/kube-apiserver.yaml
NEW QUESTION # 38
You have a Kubernetes cluster witn multiple namespaces. One namespace, "dev", is used for development and testing purposes. You want to prevent pods in the "dev" namespace from accessing resources in other namespaces.
Answer:
Explanation:
Solution (Step by Step):
1. Apply Namespace-Level Network Policy: Create a network policy that restricts pods within the "dev" namespace from accessing any resources outside the namespace.
- Create a YAML file for the Network Policy:
2. Deploy the Network Policy: Apply the YAML file using ' kubectl apply -f networkpolicy.yamr Note: This policy allows pods within "dev" to communicate with each other but blocks communication with pods in other namespaces.
NEW QUESTION # 39
SIMULATION
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:
Explanation:
Send us you rsuggestion on it
NEW QUESTION # 40
SIMULATION
Documentation
Deployment, Pod Security Admission, Pod Security Standards
You must connect to the correct host . Failure to do so may result in a zero score.
[candidate@base] $ ssh cks000036
Context
For compliance, all user namespaces enforce the restricted Pod Security Standard .
Task
The confidential namespace contains a Deployment that is not compliant with the restricted Pod Security Standard . Thus, its Pods can not be scheduled.
Modify the Deployment to be compliant and verify that the Pods are running.
The Deployment's manifest file can be found at /home/candidate/nginx-unprivileged.yaml.
Answer:
Explanation:
See the Explanation below for complete solution
Explanation:
1) Connect to the correct host
ssh cks000036
sudo -i
export KUBECONFIG=/etc/kubernetes/admin.conf
2) Confirm the failing Pods + see the PSA error (fast)
kubectl -n confidential get deploy
kubectl -n confidential get pods
kubectl -n confidential describe deploy <deployment-name> | sed -n '/Events/,$p' (You'll usually see "violates PodSecurity 'restricted' ..." with the exact missing fields.)
3) Edit the provided manifest
vi /home/candidate/nginx-unprivileged.yaml
You must ensure the Pod template becomes compliant. Add/ensure the following exact blocks:
4) Add Pod-level securityContext (under spec.template.spec)
Find:
spec:
template:
spec:
Add this block under it (or merge if securityContext: already exists):
securityContext:
runAsNonRoot: true
runAsUser: 65535
seccompProfile:
type: RuntimeDefault
5) Add Container-level securityContext (under the nginx container)
Find:
containers:
- name: ...
image: ...
Under that container, add (or adjust) this exact block:
securityContext:
allowPrivilegeEscalation: false
readOnlyRootFilesystem: true
capabilities:
drop:
- ALL
If there are multiple containers, apply the same container securityContext to each one.
Save and exit:
:wq
6) Apply the manifest to the confidential namespace
kubectl -n confidential apply -f /home/candidate/nginx-unprivileged.yaml Wait rollout:
kubectl -n confidential rollout status deployment/<deployment-name>
If you don't know the deployment name from the file, list:
kubectl -n confidential get deploy
7) Verify Pods are running
kubectl -n confidential get pods -o wide
If still failing, show the exact PSA violation (this tells you what else to fix):
kubectl -n confidential describe pod <pod-name> | sed -n '/Events/,$p'
Quick "if it still fails" fixes (common restricted blockers)
Open the manifest again and ensure these are NOT set (or are removed/false):
hostNetwork: true
hostPID: true
hostIPC: true
any hostPort:
privileged: true
capabilities.add:
seccompProfile: Unconfined
runAsUser: 0 or runAsNonRoot: false
Then re-apply.
Minimal compliant result (what the grader expects)
Your Pod template should include:
seccompProfile: RuntimeDefault
runAsNonRoot: true (and a non-root UID like 65535)
container: allowPrivilegeEscalation: false
container: capabilities.drop: [ALL]
container: readOnlyRootFilesystem: true
NEW QUESTION # 41
SIMULATION
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:
See the Explanation below
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
https://kubernetes.io/docs/concepts/services-networking/network-policies/
NEW QUESTION # 42
......
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