ssh, scp to Virtualbox

Under Network -> Advanced -> Port  Forwarding

Name: ssh

Protocol: TCP

Host Port: 3022

Guest Port: 22

Start client from terminal

VBoxManage startvm "<name>" --type headless

SSH from host to client

ssh -p 3022 kim@127.0.0.1

SCP from host to client

scp -P 3022 vpn_config.zip 127.0.0.1:.