I'm using SoftEther VPN server (multiprotocol) for my VPN needs. Among others, it does include the SSTP endpoint.
I've managed to set up IPv4 just fine - DHCP assigns IP and everything seems to be normal. But when it comes to IPv6, seems like nothing is working. Seems like no requests are coming through at all. On the Microsoft box, it just remains silent, even manually setting up IPv6 in the PPP miniport doesn't help - nothing comes through. On Android though (using VPN Client Pro) I'm just receiving a message "IPv6 configuration rejected", and no requests are coming through too.
What am I doing wrong?
PS: when trying to connect through the native SoftEther VPN client from the Windows box, IPv6 works too, I get assigned an address, and the traffic flows through it.