Cannot make outbound HTTP Requests from vagrant VM

I am unable to connect to the internet from within a Vagrant virtual machine I have set up.

For example, at the root, when I type:

curl http://google.com

It fails with the message:

curl: (6) Couldn't resolve host 'google.com'

I'm not sure if it's a firewall setting, although as far as I know I have not created any firewall rules for port 80 or any other port.

Here is the relevant section of my Vagrantfile. If there is any other information I can provide please let me know in the comments:

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"

This looks like a DNS configuration issue. Do a nslookup google.com and see what the result is.

Try to add the following block in your Vagrantfile, set --natdnshostresolver1 to on so as to force the VirtualBox NAT engine to intercept DNS requests and forward them to host's resolver

config.vm.provider :virtualbox do |vb|

  vb.customize ["modifyvm", :id, "--natdnshostresolver1", "on"]

end

BTW: Without vagrant reload, you can directly look into the /etc/resolv.conf inside the VM, can manually set it to the DNS server of your network, most likely it'll work fine.