Limitations:
Network: company
Host: DHCP
Host NIC bridge: disabled
Network access: limited
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Based on that, it might not be possible to set the VM to access Internet, & visible to host at the same time.
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1. Set the VM IP to "DHCP"
vi /etc/network/interfaces
Set the VM‘s NIC in Virtual Box as 网络地址转换(NAT)
Reboot VM.
Now VM can access public Internet via host‘s NIC. But host cannot access VM. You can use apt-get now.
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2. Set the VM IP to "static", make it in the same domain as VBox‘s NIC in host
Set the VM‘s NIC in Virtual Box as 仅主机(Host-Only)网络
Reboot VM.
Now VM cannot access Internet, but host can ping this VM‘s IP. You can do your dev work using this VM now.
Virtual Box VM network configuration - Virtual Box VM 配置上网
原文：http://www.cnblogs.com/anbosun/p/6010163.html