我无法从我设置的 Vagrant 虚拟机中连接到互联网。
例如，在根目录下，当我键入：
curl http://google.com
它失败并显示以下消息：
curl: (6) Couldn't resolve host 'google.com'
我不确定这是否是防火墙设置，但据我所知，我还没有为端口 80 或任何其他端口创建任何防火墙规则。
这是我的 Vagrantfile 的相关部分。如果我可以提供任何其他信息，请在评论中告诉我：
Vagrant.configure("2") do |config|
# All Vagrant configuration is done here. The most common configuration
# options are documented and commented below. For a complete reference,
# please see the online documentation at vagrantup.com.
# Let Vagrant manage the hostname at boot
config.vm.hostname = "devbox"
# Create a forwarded port mapping which allows access to a specific port
# within the machine from a port on the host machine. In the example below,
# accessing "localhost:8080" will access port 80 on the guest machine.
# config.vm.network :forwarded_port, guest: 80, host: 8080
# Create a private network, which allows host-only access to the machine
# using a specific IP.
config.vm.network :private_network, ip: "10.0.0.10"
# Create a public network, which generally matched to bridged network.
# Bridged networks make the machine appear as another physical device on
# your network.
# config.vm.network :public_network
# Create a public network with a given hardware address. You can
# configure your DHCP server (on your router) to assign a particular IP
# address to the VM. Update your hosts file accordingly.
# config.vm.network :public_network, mac: "0a00251010101"
# Share an additional folder to the guest VM. The first argument is
# the path on the host to the actual folder. The second argument is
# the path on the guest to mount the folder. And the optional third
# argument is a set of non-required options.
#config.vm.synced_folder "vagrant/logs", "/logs",
# owner: "root", group: "root"
# Base box to use with Virtualbox provider
config.vm.box = "debian-7.0.0-amd64-base"
config.vm.box_url = "http:/mysite.com/debian-7.0.0-amd64-base.box"