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Author SHA1 Message Date
Claude
369f459203
Add AWS Client VPN support for secure private access to code-server
This commit adds comprehensive VPN infrastructure to enable secure,
certificate-based access to code-server deployments. VPN provides an
additional security layer by requiring network-level authentication
before accessing internal resources.

Features:
- AWS Client VPN endpoint with certificate-based authentication
- Split tunnel support (route only VPC traffic through VPN)
- CloudWatch logging for all VPN connections
- Multi-platform client support (Windows, macOS, Linux, iOS, Android)
- Automatic certificate generation and ACM upload
- Client configuration export scripts
- Integration with both EC2 and EKS deployments

New Terraform Module:
- modules/vpn: Complete AWS Client VPN infrastructure
  - VPN endpoint with configurable authentication
  - Network associations for HA across multiple AZs
  - Authorization rules for VPC access
  - Security groups for VPN traffic
  - CloudWatch log groups and streams
  - Support for SAML/federated authentication

Scripts:
- scripts/generate-vpn-certificates.sh: Generate and upload VPN certificates
  - Creates CA, server, and client certificates
  - Automatically uploads to AWS Certificate Manager
  - Outputs certificate ARNs for Terraform configuration
- scripts/export-vpn-config.sh: Export client VPN configuration
  - Downloads VPN config from AWS
  - Embeds client certificates
  - Creates platform-ready .ovpn files

Deployment Updates:
- EC2 and EKS deployments now support optional VPN
- New variables for VPN configuration
- Updated outputs to include VPN endpoint information
- Example configurations with VPN settings

Documentation:
- VPN-SETUP-GUIDE.md: Comprehensive VPN setup guide
  - Certificate generation process
  - Terraform configuration
  - Client setup for all major platforms
  - Testing and troubleshooting
  - Advanced configuration options
  - Cost considerations and optimization

Configuration Options:
- Certificate-based or SAML/SSO authentication
- Split tunnel (recommended) or full tunnel
- UDP (faster) or TCP (more reliable) transport
- Configurable session timeout (8-24 hours)
- Custom DNS servers
- Client login banner
- Multiple authorization rules

Security Features:
- X.509 certificate authentication
- Private subnet associations
- Network-level access control
- Session logging and audit trail
- Support for multi-factor (VPN cert + OAuth2/SAML)

Cost: ~$216/month base + ~$0.40/user/day for active connections
2025-11-15 17:40:23 +00:00