Well, despite downvotes without any kind of explanation why (thank you!), I have found a way of doing what I intended on Virtualbox settings:
On machine, right click, Settings > Network > Advanced > Port forwarding, and then, fill with corresponding data, i.e.:
- host ip could be 0.0.0.0,
- host port should be the port other users will use to access your computer (and thus the VM),
- guest ip is the VM ip, and
- guest port should be 80 if it is a web server typically).
Thank you, hope this helps to the next one running into this!
Source: networking - Accessing a web server on a Virtual Machine from another computer - Stack Overflow