PMJI - I have a similar situation, just want to really confirm the answer:
I want to host wiki.friend.com but I do not host friend.com here. I was going to tell them to set their DNS for that subdomain to point to DH where we would handle services, but in order to host a subdomain, the panel is telling me we first need to host the domain.
In short, I don't own friend.com but they are eager to point a subdomain here.
Can we do that without http redirect?
If not, what issues are we facing? I'm thinking a redirect will be messy too but I'm wondering just how clean a cloak or other mechanism is. If someone comes to wiki.friend.com/page, is there any indication to the user that they're landing at wiki.mysite.com/page?