Igen, ezt mar kiprobaltam, de a "HostPort"-nak beallitott porton (amit a vbox elvileg a guest-nek forwardol) nem figyel semmi:
$ VBoxManage getextradata "gentoo" enumerate
[...]
Key: VBoxInternal/Devices/pcnet/0/LUN#0/Config/ssh/HostPort, Value: 16016
Key: VBoxInternal/Devices/pcnet/0/LUN#0/Config/ssh/GuestPort, Value: 22
Key: VBoxInternal/Devices/pcnet/0/LUN#0/Config/ssh/Protocol, Value: TCP
$ nmap -p16016 127.0.0.1
[...]
PORT STATE SERVICE
16016/tcp closed unknownIgy minden packet amit a router oda kuld, megy a levesbe.