You can assign both IPv4 and IPv6 to each server when you create it or later in the server element itself.
But we also give you the freedom to use servers without external IPs – e.g. for servers that should only be accessible in an internal network.
If you need more than one IPv4/IPv6 on a server, you can add additional IPs in the IP manager and mark them as failover. These IPs can then be manually configured on each of your servers.