использование MS DirectAccess

На википедии пишут:

DirectAccess establishes IPSec tunnels from the client to the DirectAccess server, and uses IPv6 to reach intranet resources or other DirectAccess clients. This technology encapsulates the IPv6 traffic over IPv4 to be able to reach the intranet over the Internet, which still relies on IPv4 traffic. A DirectAccess client can use one of several tunnelling technologies, depending on the configuration of the network the client is connected to. The client can use 6to4, Teredo tunneling, or IP-HTTPS, provided the server is configured correctly to be able to use them. For example, a client that is connected to the internet directly will use 6to4, but if it is inside a NATed network, it will use Teredo instead.

DirectAccess in UAG provides enterprise features for a DirectAccess solution, such as centralized management, high availability, and enhanced security (UAG contains a EAL4+ Certified firewall, so it can be used on the edge of your network). UAG also provides a NAT64 and DNS64, allowing you to provide DirectAccess clients with access to IPv4-only resources on your network.

Так что в теории возможно.

Это айписек на ipv6