I want to install a VirtualBox guest that will host Asterisk. I want it to be able to communicate with the outside world on specific ports (so it can handle calls) but have zero access to the internal network or any other computers or even any other ports to the outside world (and I don't even want it to have access to the router). I want it locked down and stripped of any rights it doesn't need. So if it should get hacked, they couldn't do anything to my network and can't even send spam or data except through the ports reserved for asterisk (hopefully limiting damage).
Is this possible? How would I do this?
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