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Docker Content Trust (DCT) and Kubernetes Network Policies Ensuring Security in Containerized Environments +91-7032290546 www.visualpath.in
Introduction • Objective: Understand how Docker Content Trust and Kubernetes Network Policies help enhance container security. • Agenda: • What is Docker Content Trust? • Benefits of DCT • What are Kubernetes Network Policies? • Use cases and examples +91-7032290546 www.visualpath.in
What is Docker Content Trust (DCT)? • Definition: Docker Content Trust enables digital signature verification for Docker images. • How it works: • Uses Notary for signing and verification • Ensures the integrity and publisher authenticity of images • Key Concept: Only signed and verified images can be pulled and deployed +91-7032290546 www.visualpath.in
Benefits of Docker Content Trust • Prevents the use of tampered or unauthorized images • Enhances CI/CD pipeline security • Enables trust in image publishers • Compliance support for secure deployments +91-7032290546 www.visualpath.in
Enabling Docker Content Trust • Command:export DOCKER_CONTENT_TRUST=1 • Behavior: • Enforces verification on pull, push, and build • Blocks unsigned images by default • Note: It requires signed images to function properly +91-7032290546 www.visualpath.in
What are Kubernetes Network Policies? • Definition: Kubernetes Network Policies are rules that control traffic flow at the IP address or port level between pods. • Purpose: Improve cluster security by controlling communication between workloads • Scope: • Ingress (incoming traffic) • Egress (outgoing traffic) +91-7032290546 www.visualpath.in
How Kubernetes Network Policies Work • Applied to pods using labels • Define allowed sources/destinations using selectors • Implemented via network plugins (e.g., Calico, Cilium) • Example YAML snippet (brief and non-code explanation) +91-7032290546 www.visualpath.in
Use Cases & Best Practices • DCT Use Cases: • Secure software supply chain • Prevent rogue image deployment • Network Policy Use Cases: • Isolate sensitive pods • Implement zero-trust architecture • Best Practices: • Always sign images • Start with default deny rules for Kubernetes policies +91-7032290546 www.visualpath.in
Conclusion & Takeaways • Docker Content Trust secures image authenticity • Kubernetes Network Policies protect internal communication • Combine both for a stronger container security posture • Final Tip: Regularly audit and test your policies and image signing setup +91-7032290546 www.visualpath.in
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