SD-WAN Security Architecture Design

SD-WAN Security Fundamentals

SD-WAN introduces new security considerations. Traditional hub-and-spoke architectures route traffic through centralized security controls. SD-WAN enables direct internet access and cloud connectivity from branch locations, requiring distributed security architecture.

Encryption and Transport Security

Ensure all SD-WAN traffic is encrypted regardless of transport medium. Implement IPsec or proprietary encryption for all overlays. Verify encryption extends across internet, MPLS, and broadband connections. Consider performance implications of encryption overhead.

• End-to-end encryption across all transports
• IPsec or vendor-proprietary encryption
• Key management and rotation
• Performance optimization
• Encryption validation and monitoring

Segmentation and Isolation

SD-WAN simplifies creating virtual networks for traffic segregation. Design segments based on data sensitivity, user roles, and application requirements. Isolate guest networks, IoT devices, and OT systems from corporate resources.

Direct Internet Breakout Security

Direct internet access from branches improves performance but requires branch-level security. Implement next-generation firewalls, secure web gateways, or cloud-based security services at branch locations. Ensure consistent security policy enforcement across all locations.

• Branch-level NGFW deployment
• Cloud security service integration
• Consistent policy enforcement
• URL filtering and malware protection
• DNS security

Cloud Security Integration

SD-WAN facilitates direct cloud connectivity. Integrate with cloud security services including CASB, cloud firewalls, and cloud access security. Address identity management, data protection, and visibility across multi-cloud environments.