[compressedgas]

Why can't you set up a network device in VirtualBox for the VM which would be bridged to the interface provided by the VPN?

[unstuck3958]

So without going into too many details, I can't do it because my VM would still need to be authorized by one of my company's security providers. Which should've been fine, except that the security staff insists I get a new Linux PC and RDP/VNC my way into it from Windows, which I really don't want to do.

Besides, tunneling through filesystems sounds more fun.