It's not a big deal, but it's a pit-daddy, so write it.
To the students when the Web server encountered, the virtual box Slackware configuration, migrated to the home host is Win8.1 desktop after encountering, Network service configuration file No problem, service can start, but ifconfig not see the network card, There is only one lo.
The reason is that while virtual Box is imported with the option to reset the Nic Mac, it's actually like resetting the virtual machine, and the system in the VM has to manually change the MAC address.
Directory "//etc/udev/rules.d" look for the ".conf" file with "net", and then change the MAC address to the MAC address of the current virtual machine.
Restart the "/etc/rc.d/rc.inet1", and then "ifconfig", now it should be out of the LO Network card and network--of course, your "/etc/rc.d/rc.inet1.conf" is not configured incorrectly.
If you are afraid of trouble, directly with static IP bridge to the route (configuration file do not forget to write the gateway), do the next 22 and 80 port forwarding, you can take SSH and Web server. "chmod +x rc.file" under the service boot, open the virtual system to minimize the basic need not tube.