If you want to Forward Ports to VirtualBox or Virtual Machine and use it like a server, follow instructions for VirtuaBox Port forwarding.

A virtual machine with NAT enabled acts much like a real computer that connects to the Internet through a router. The “router”, in this case, is the VirtualBox networking engine, which maps traffic ...

VirtualBox and virtual machines VirtualBox is software that runs on Windows, OS X, Linux, and Solaris, capable of full virtualization.

This quick how-to article walks you through the process of connecting to a VirtualBox virtual machine, so you can work locally on a remote desktop.