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| Section | Weight | Objectives |
|---|---|---|
| Monitoring, Logging, and Runtime Security | 20% | - Minimize the attack surface using container health indicators - Understand and monitor network traffic - Perform behavioral analytics to detect malicious activity - Audit and detect logs and events for anomalies - Detect threats at the container level - Falco - container security monitoring and threat detection |
| System Hardening | 15% | - Modify host components to improve security - Enable audit logging - Kernel defaults and parameters using sysctl - Understand the concept of OPA (Open Policy Agent) and Gatekeeper |
| Minimize Microservice Vulnerabilities | 20% | - Set appropriate security contexts for pods and containers - Use PSP to enforce security controls - Understand the principle of immutable containers - Configure network policies for namespace isolation - Use AppArmor or seccomp profiles to constrain container behavior - Use OPA Gatekeeper to enforce security controls |
| Supply Chain Security | 20% | - Understand the container build process - Use static analysis tools to detect vulnerabilities - Minimize base image footprint - Use distroless images for static workload - Understand the software supply chain best practices - Use image admission controllers to prevent use of untrusted images - Sign container images and verify signatures - Understand image security scanning and its workflow |
| Cluster Hardening | 15% | - Minimize admission of containers without AppArmor profile - Minimize admission of containers with sharing the host process namespace - Minimize admission of containers without a security context - Minimize admission of containers with sharing the host network namespace - Minimize admission of containers without seccomp profiles - Minimize admission of containers with allowPrivilegeEscalation - Minimize admission of containers that allow host namespaces - Minimize admission of containers with raw block devices - Minimize admission of containers with capabilities assigned - Minimize admission of containers with sharing the host IPC namespace - Minimize admission of containers with hostPath volumes - Minimize admission of privileged containers - Minimize admission of containers with added capabilities - Minimize admission of containers with FlexVolume volumes |
| Cluster Setup | 10% | - Configure TLS certificates and minimum version for etcd - Implement Pod-to-Pod encryption using mTLS or WireGuard - Manage sensitive information in clusters - Understand the security implications of embedding cloud provider flags - Use Cis benchmarks to check Kubernetes cluster settings - Use role-based access control (RBAC) to minimize exposure - Use Pod Security Policies to control security-related pod behaviors |
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NEW QUESTION # 33
SIMULATION
Service is running on port 389 inside the system, find the process-id of the process, and stores the names of all the open-files inside the /candidate/KH77539/files.txt, and also delete the binary.
Answer:
Explanation:
See the Explanation belowExplanation:
root# netstat -ltnup
Active Internet connections (only servers)
Proto Recv-Q Send-Q Local Address Foreign Address State PID/Program name tcp 0 0 127.0.0.1:17600 0.0.0.0:* LISTEN 1293/dropbox tcp 0 0 127.0.0.1:17603 0.0.0.0:* LISTEN 1293/dropbox tcp 0 0 0.0.0.0:22 0.0.0.0:* LISTEN 575/sshd tcp 0 0 127.0.0.1:9393 0.0.0.0:* LISTEN 900/perl tcp 0 0 :::80 :::* LISTEN 9583/docker-proxy tcp 0 0 :::443 :::* LISTEN 9571/docker-proxy udp 0 0 0.0.0.0:68 0.0.0.0:* 8822/dhcpcd
...
root# netstat -ltnup | grep ':22'
tcp 0 0 0.0.0.0:22 0.0.0.0:* LISTEN 575/sshd
The ss command is the replacement of the netstat command.
Now let's see how to use the ss command to see which process is listening on port 22:
root# ss -ltnup 'sport = :22'
Netid State Recv-Q Send-Q Local Address:Port Peer Address:Port
tcp LISTEN 0 128 0.0.0.0:22 0.0.0.0:* users:("sshd",pid=575,fd=3))
NEW QUESTION # 34
You have a deployment named 'database-deployment' running a PostgreSQL database container. You need to restrict access to the database from any other pods in the cluster except for a specific pod with the label Sapp:backend'.
Answer:
Explanation:
Solution (Step by Step) :
1. Create a NetworkPolicy for the database deployment
2. Apply the NetworkPolicy: bash kubectl apply -f database-policy-yaml - The 'database-policy' is applied to pods with the label 'app-.database' - The 'ingress' section allows traffic only from pods with the label 'app:backend' - All other ingress traffic is blocked. Important Notes: - Ensure that the 'backend' pod has the correct label - This policy restricts access to the database pod from any other pods, including within the same namespace. - You can customize this policy further to allow specific ports or protocols.
NEW QUESTION # 35
You have a Kubernetes cluster with a deployment running a critical application. You need to restrict inbound network access to the pods in this deployment to only allow traffic from a specific service within the cluster. How would you achieve this using NetworkPolicy?
Answer:
Explanation:
Solution (Step by Step):
1. Create a NetworkP01icy: Define a NetworkPoliCY resource that specifies the allowed ingress traffic.
- Name: 'allow-service-access (you can choose any name)
- Namespace: The same namespace as the deployment you want to restrict.
- Spec:
- PodSeIector: This should match the pods in your deployment. You can use labels to select the pods.
- Ingress: This defines the allowed incoming traffic.
- From: Define the source of the allowed traffic.
- PodSeIector: If the traffic is coming from another deployment within the cluster, you can define the pod selector for that deployment.
- Namespaceselector: It the traffic is coming trom a service within the cluster, you can define the namespace selector.
- IPBIock: If the traffic is coming from a specific IP range, you can use 'IP310ck' to define that.
- Ports: This defines the specific ports that are allowed.
- You can either specify individual (e.g., 'tcp:80') or a port range (e.g., 'tcp:80-8080').
2. Apply the NetworkPolicy:
- Use 'kubectl apply -f networkpolicy.yamr to create the NetworkPolicy.
Example YAML for NetworkPolicy:
- The NetworkP01icy allows inbound traffic from any pod in the namespace With label - This traffic can access port 80 (TCP) on the pods with the label 'app: Important Notes: - NetworkPolicies are enforced at the pod level. If no NetworkPolicy is defined, all traffic is allowed by default. - If you need to allow traffic from multiple sources, you can define multiple 'ingress' rules within the NetworkPolicy. - Make sure you have sufficient understanding of Kubernetes Networking and NetworkPolicy concepts before implementing this.
NEW QUESTION # 36
You are tasked with securing a Kubemetes cluster that is running on AWS- One of the security best practices you want to implement is to limit tne number of IP addresses that can access the Kubernetes API server. You need to configure the 'kube-apiserver' to only allow access from specific IP addresses, using the '--insecure-bind-address' flag to restrict access.
How would you configure 'kube-apiserver' to achieve this using an '--insecure-bind-address' flag, but allow access from only specific IP addresses?
Answer:
Explanation:
Solution (Step by Step) :
1 . Identify Allowed IP Addresses: Determine the specific IP addresses that should be allowed to access the Kubernetes API server. For example, you might allow access from your local machine's IP address (e.g., 192.168.1.100), and the IP addresses of any bastion hosts that are used for remote management.
2. Modify the 'kube-apiserver' Configuration:
- Locate the 'kube-apjserver' configuration file (typically found at "etc/kubernetestmanifests/kube-apiserver.yaml or similar).
- In tne 'kube-apiserver' configuration file, find tne '--insecure-bind-address' flag.
- Set the '--insecure-bind-address' flag to '0.0.0.0' to allow access from all IP addresses.
3. Restart 'kube-apiserver': Apply the updated configuration file. Depending on how the Kubernetes cluster is deployed, you may need to restart the 'kube-apisepver' pod or container. 4. Verify the Configuration: - After restarting 'kube-apiservers , test that you can access the API server from the allowed IP addresses. - Test from any disallowed IP addresses to confirm access is blocked.
NEW QUESTION # 37
SIMULATION
You can switch the cluster/configuration context using the following command:
[desk@cli] $ kubectl config use-context qa
Context:
A pod fails to run because of an incorrectly specified ServiceAccount
Task:
Create a new service account named backend-qa in an existing namespace qa, which must not have access to any secret.
Edit the frontend pod yaml to use backend-qa service account
Note: You can find the frontend pod yaml at /home/cert_masters/frontend-pod.yaml
Answer:
Explanation:
See the Explanation belowExplanation:
[desk@cli] $ k create sa backend-qa -n qa
sa/backend-qa created
[desk@cli] $ k get role,rolebinding -n qa
No resources found in qa namespace.
[desk@cli] $ k create role backend -n qa --resource pods,namespaces,configmaps --verb list
# No access to secret
[desk@cli] $ k create rolebinding backend -n qa --role backend --serviceaccount qa:backend-qa
[desk@cli] $ vim /home/cert_masters/frontend-pod.yaml
apiVersion: v1
kind: Pod
metadata:
name: frontend
spec:
serviceAccountName: backend-qa # Add this
image: nginx
name: frontend
[desk@cli] $ k apply -f /home/cert_masters/frontend-pod.yaml
pod created
[desk@cli] $ k create sa backend-qa -n qa
serviceaccount/backend-qa created
[desk@cli] $ k get role,rolebinding -n qa
No resources found in qa namespace.
[desk@cli] $ k create role backend -n qa --resource pods,namespaces,configmaps --verb list role.rbac.authorization.k8s.io/backend created
[desk@cli] $ k create rolebinding backend -n qa --role backend --serviceaccount qa:backend-qa rolebinding.rbac.authorization.k8s.io/backend created
[desk@cli] $ vim /home/cert_masters/frontend-pod.yaml
apiVersion: v1
kind: Pod
metadata:
name: frontend
spec:
serviceAccountName: backend-qa # Add this
image: nginx
name: frontend
[desk@cli] $ k apply -f /home/cert_masters/frontend-pod.yaml
pod/frontend created
https://kubernetes.io/docs/tasks/configure-pod-container/configure-service-account/
NEW QUESTION # 38
......
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