IPv6 address for restored servers
This setting is only used when restoring a virtual server that does not
currently exist on the system. By default, Virtualmin will either assign it
the system's default shared IPv6 address if it was on a shared IP originally, or
use the private IPv6 address from the original system if it wasn't on a shared
address.
This works fine if your are moving a domain between two systems on the same
network, but if not the restored domain is not likely to be contactable via
the network. To avoid this, select the Virtual with allocated IP or
Virtual with IP option in this field, and Virtualmin will either select
a free IP for you, or use the one you enter.