hamachi is the only vpn (besides hardware - cisco --) that i have tested with hfs
Traffice works through the internet via hamachi vpn ip via a pre conected group of pc
https://www.vpn.net/(back in the world of warcraft private server days :p )
ip of said pc run through the loopback (127.0.0.1) address
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is it possible yes, with routing and other port services that are proviced via a vpn
I don't know of your paid verison, and if they support full portforwarind with there vpn services.
Nor a setup that would work