I have set up a virtual machine on my network for uni project development. I have 6 team members and I don't want them to SSH in and start sniffing my network traffic. I already have set the firewall on my W7 pcs to ignore any connection attempts from the Virtual Machine, but would like to go a step further and not allow any network access from the VM to other machines on my network.

Team members will be access the VM by SSH. The only external port forwarded is to vm:22.

The VM is running in VirtualBox on a bridged network connection. Running latest Debian.

If someone could tell me how to do this I would be much obliged.