To achieve the host access function, and virtual machines can communicate with each other.
First with the bridge is certainly achievable, but generally restrict network management network, a person can only use a static ip address.
Virtual Internet using NAT function, you can ping the host, but the host ping through virtual machines.
Solutions to achieve the host virtual machines connected by way of port forwarding.
Test virtualbox installed kali
This allows ssh connection go up
kali in open ssh
vi / etc / ssh / sshd_config
the foregoing comments permitrootlogin removed, and yes to later
be removed #PasswordAuthentication no comment, and the NO YES // kali modify the default is yes
then restart ssd service
/etc/init.d / ssh restart
ssh root @ ip -p 2222 in the host machine
The successful connection