Http applications to hide from prying eyes?

Question

Computer networks

There is a remote web application with authorization by login / password, you need to hide port 80 of the server in vpn, let everyone from the network go to the server through the tunnel, if just remote clients, then the vpn client is launched and used in the same way. I understand that it is possible, but I don't understand how to do it. There is sstp on the server, I can connect to it, but no further routing occurs, no new interfaces are raised, and it is not clear what to configure at all. I would really like the help of knowledgeable people, and not how to solve it differently. I'm looking for an sstp specialist and for some reason I can't find one.