The SDK update adds a new 'category' field which allows you to discover the category of your VPN – ‘AWS Classic VPN’ or ‘AWS VPN’. This provides insight into the capabilities of your VPN connection. The new custom PSK and inside tunnel IP features are only available for AWS VPN. Previously launched features only available for AWS VPN are CloudWatch Metrics, AES 256, SHA-2, additional Diffie Hellman groups, and NAT Traversal.