Lightsail instances support two types of networking—dual-stack networking (IPv4 and IPv6) and IPv6-only networking. With dual-stack networking, your instance is assigned a public IPv4 and a public IPv6 address. For instances with dual-stack networking, you can enable or disable IPv6 as needed.
With IPv6-only networking, your instance is assigned a public IPv6 address and doesn't support public IPv4 traffic. Not all Lightsail blueprints are compatible with IPv6. To learn which blueprints support IPv6-only, see IPv6 compatible blueprints. Additionally, an instance with IPv6-only networking can't be configured as the origin resource for a Lightsail content delivery network (CDN) distribution. For more information about Lightsail distributions, see Serve web content globally with Lightsail content delivery distributions.
Use IPv6-only networking if you don’t require a public IPv4 address. But first, make sure that your local network, computer, devices, and end-users can communicate using IPv6. For more information, see IPv6 reachability in Verify IPv6 reachability for Lightsail instances.
For existing instances with supported blueprints, you can change the networking type between dual-stack networking and IPv6-only networking. To review the considerations of IPv6-only networking and make changes to existing instances, see Switch instance networking type to IPv6 or dual-stack in Lightsail.
