在有线连接下（或使用台式）查到自己的 IP

设置 Open network preference -> AirPort -> Advanced -> TCP/IP

configure IPv4 选  manual 

|| IP || 192.168.19.xxx ||
|| route || 192.168.20.1 ||
|| subnet mask || 255.255.248.0 ||

DNS

|| DNS || 192.168.11.228 ||

VirtualBox 选 NAT 方式上网即可。