mtls-configurationlisted

# mTLS Configuration Comprehensive guide to implementing mutual TLS for zero-trust service mesh communication. ## When to Use This Skill - Implementing zero-trust networking - Securing service-to-service communication - Certificate rotation and management - Debugging TLS handshake issues - Compliance requirements (PCI-DSS, HIPAA) - Multi-cluster secure communication ## Core Concepts ### 1. mTLS Flow ``` ┌─────────┐ ┌─────────┐ │ Service │ │ Service │ │ A │ │ B │ └────┬────┘ └────┬────┘ │ │ ┌────┴────┐ TLS Handshake ┌────┴────┐ │ Proxy │◄───────────────────────────►│ Proxy │ │(Sidecar)│ 1. ClientHello │(Sidecar)│ │ │ 2. ServerHello + Cert │ │ │ │ 3. Client Cert │ │ │ │ 4. Verify Both Certs │ │ │ │ 5. Encrypted Channel │ │ └─────────┘ └─────────┘ ``` ### 2. Certificate Hierarchy ``` Root CA (Self-signed, long-lived) │ ├── Intermediate CA (Cluster-level) │ │ │ ├── Workload Cert (Service A) │ └── Workload Cert (Service B) │ └── Intermediate CA (Multi-cluster) │ └── Cross-cluster certs ``` ## Templates ### Template 1: Istio mTLS (Strict Mode) ```yaml # Enable strict mTLS mesh-wi