Understand IPv6 support and configuration requirements for Vultr NAT Gateways.
NAT Gateways support IPv6. However, IPv6 connectivity is not enabled automatically for instances within a VPC. To use IPv6 with a NAT Gateway, you must manually enable and configure IPv6 on your instance. If IPv6 is not configured at the instance level, outbound traffic through the NAT Gateway will continue to use IPv4 only.