diff --git a/plugins/providers/virtualbox/action.rb b/plugins/providers/virtualbox/action.rb
index 47dad1284..693275cdc 100644
--- a/plugins/providers/virtualbox/action.rb
+++ b/plugins/providers/virtualbox/action.rb
@@ -23,7 +23,6 @@ module VagrantPlugins
       autoload :DestroyUnusedNetworkInterfaces, File.expand_path("../action/destroy_unused_network_interfaces", __FILE__)
       autoload :DiscardState, File.expand_path("../action/discard_state", __FILE__)
       autoload :Export, File.expand_path("../action/export", __FILE__)
-      autoload :ForwardPorts, File.expand_path("../action/forward_ports", __FILE__)
       autoload :Halt, File.expand_path("../action/halt", __FILE__)
       autoload :HostName, File.expand_path("../action/host_name", __FILE__)
       autoload :Import, File.expand_path("../action/import", __FILE__)
@@ -59,14 +58,13 @@ module VagrantPlugins
           b.use ClearForwardedPorts
           b.use EnvSet, :port_collision_handler => :correct
           b.use CheckPortCollisions
-          b.use ForwardPorts
           b.use Provision
           b.use PruneNFSExports
           b.use NFS
           b.use ClearSharedFolders
           b.use ShareFolders
           b.use ClearNetworkInterfaces
-          #b.use Network
+          b.use Network
           b.use HostName
           b.use SaneDefaults
           b.use Customize
diff --git a/plugins/providers/virtualbox/action/network.rb b/plugins/providers/virtualbox/action/network.rb
index 31a6fa38d..ccb1cf6d0 100644
--- a/plugins/providers/virtualbox/action/network.rb
+++ b/plugins/providers/virtualbox/action/network.rb
@@ -7,397 +7,204 @@ require "vagrant/util/network_ip"
 module VagrantPlugins
   module ProviderVirtualBox
     module Action
+      # This middleware class sets up all networking for the VirtualBox
+      # instance. This includes host only networks, bridged networking,
+      # forwarded ports, etc.
+      #
+      # This handles all the `config.vm.network` configurations.
       class Network
-        # Utilities to deal with network addresses
         include Vagrant::Util::NetworkIP
 
         def initialize(app, env)
-          @logger = Log4r::Logger.new("vagrant::action::vm::network")
-
-          @app = app
+          @logger = Log4r::Logger.new("vagrant::plugins::virtualbox::network")
+          @app    = app
         end
 
         def call(env)
+          # TODO: Validate network configuration prior to anything below
           @env = env
 
-          # First we have to get the array of adapters that we need
-          # to create on the virtual machine itself, as well as the
-          # driver-agnostic network configurations for each.
-          @logger.debug("Determining adapters and networks...")
-          adapters = []
-          networks = []
-          env[:machine].config.vm.networks.each do |type, args|
-            # Get the normalized configuration we'll use around
-            config = send("#{type}_config", args)
+          # Get the list of network adapters from the configuration
+          network_adapters_config = env[:machine].provider_config.network_adapters.dup
 
-            # Get the virtualbox adapter configuration
+          # Assign the adapter slot for each high-level network
+          available_slots = Set.new(1..8)
+          network_adapters_config.each do |slot, _data|
+            available_slots.delete(slot)
+          end
+
+          @logger.debug("Available slots for high-level adapters: #{available_slots.inspect}")
+          @logger.info("Determinging network adapters required for high-level configuration...")
+          available_slots = available_slots.to_a.sort
+          env[:machine].config.vm.networks.each do |type, args|
+            # We only handle private and public networks
+            next if type != :private_network && type != :public_network
+
+            options = nil
+            options = args.last if args.last.is_a?(Hash)
+            options ||= {}
+
+            # Figure out the slot that this adapter will go into
+            slot = options[:virtualbox__adapter]
+            if !slot
+              if available_slots.empty?
+                # TODO: Error that we have no room for this adapter
+              end
+
+              slot = available_slots.shift
+            end
+
+            # Configure it
+            data = nil
+            if type == :private_network
+              # private_network = hostonly
+
+              config_args = [args[0]]
+              data = [:hostonly, config_args]
+            elsif type == :public_network
+              # public_network = bridged
+
+              config_args = []
+              data = [:bridged, config_args]
+            end
+
+            # Store it!
+            @logger.info(" -- Slot #{slot}: #{data[0]}")
+            network_adapters_config[slot] = data
+          end
+
+          @logger.info("Determining adapters and compiling network configuration...")
+          adapters = []
+          network_adapters_config.each do |slot, data|
+            type = data[0]
+            args = data[1]
+
+            @logger.info("Network slot #{slot}. Type: #{type}.")
+
+            # Get the normalized configuration for this type
+            config = send("#{type}_config", args)
+            config[:adapter] = slot
+
+            @logger.debug("Normalized configuration: #{config.inspect}")
+
+            # Get the VirtualBox adapter configuration
             adapter = send("#{type}_adapter", config)
             adapters << adapter
 
-            # Get the network configuration
-            network = send("#{type}_network_config", config)
-            network[:_auto_config] = true if config[:auto_config]
-            networks << network
+            @logger.debug("Adapter configuration: #{adapter.inspect}")
           end
 
           if !adapters.empty?
-            # Automatically assign an adapter number to any adapters
-            # that aren't explicitly set.
-            @logger.debug("Assigning adapter locations...")
-            assign_adapter_locations(adapters)
-
-            # Verify that our adapters are good just prior to enabling them.
-            verify_adapters(adapters)
-
-            # Create all the network interfaces
+            # Enable the adapters
             @logger.info("Enabling adapters...")
             env[:ui].info I18n.t("vagrant.actions.vm.network.preparing")
             env[:machine].provider.driver.enable_adapters(adapters)
           end
 
-          # Continue the middleware chain. We're done with our VM
-          # setup until after it is booted.
+          # Continue the middleware chain.
           @app.call(env)
 
-          if !adapters.empty? && !networks.empty?
-            # Determine the interface numbers for the guest.
-            assign_interface_numbers(networks, adapters)
-
-            # Configure all the network interfaces on the guest. We only
-            # want to configure the networks that have `auto_config` setup.
-            networks_to_configure = networks.select { |n| n[:_auto_config] }
-            env[:ui].info I18n.t("vagrant.actions.vm.network.configuring")
-            env[:machine].guest.configure_networks(networks_to_configure)
-          end
-        end
-
-        # This method assigns the adapter to use for the adapter.
-        # e.g. it says that the first adapter is actually on the
-        # virtual machine's 2nd adapter location.
-        #
-        # It determines the adapter numbers by simply finding the
-        # "next available" in each case.
-        #
-        # The adapters are modified in place by adding an ":adapter"
-        # field to each.
-        def assign_adapter_locations(adapters)
-          available  = Set.new(1..8)
-
-          # Determine which NICs are actually available.
-          interfaces = @env[:machine].provider.driver.read_network_interfaces
-          interfaces.each do |number, nic|
-            # Remove the number from the available NICs if the
-            # NIC is in use.
-            available.delete(number) if nic[:type] != :none
-          end
-
-          # Based on the available set, assign in order to
-          # the adapters.
-          available = available.to_a.sort
-          @logger.debug("Available NICs: #{available.inspect}")
-          adapters.each do |adapter|
-            # Ignore the adapters that already have been assigned
-            if !adapter[:adapter]
-              # If we have no available adapters, then that is an exceptional
-              # event.
-              raise Vagrant::Errors::NetworkNoAdapters if available.empty?
-
-              # Otherwise, assign as the adapter the next available item
-              adapter[:adapter] = available.shift
-            end
-          end
-        end
-
-        # Verifies that the adapter configurations look good. This will
-        # raise an exception in the case that any errors occur.
-        def verify_adapters(adapters)
-          # Verify that there are no collisions in the adapters being used.
-          used = Set.new
-          adapters.each do |adapter|
-            raise Vagrant::Errors::NetworkAdapterCollision if used.include?(adapter[:adapter])
-            used.add(adapter[:adapter])
-          end
-        end
-
-        # Assigns the actual interface number of a network based on the
-        # enabled NICs on the virtual machine.
-        #
-        # This interface number is used by the guest to configure the
-        # NIC on the guest VM.
-        #
-        # The networks are modified in place by adding an ":interface"
-        # field to each.
-        def assign_interface_numbers(networks, adapters)
-          current = 0
-          adapter_to_interface = {}
-
-          # Make a first pass to assign interface numbers by adapter location
-          vm_adapters = @env[:machine].provider.driver.read_network_interfaces
-          vm_adapters.sort.each do |number, adapter|
-            if adapter[:type] != :none
-              # Not used, so assign the interface number and increment
-              adapter_to_interface[number] = current
-              current += 1
-            end
-          end
-
-          # Make a pass through the adapters to assign the :interface
-          # key to each network configuration.
-          adapters.each_index do |i|
-            adapter = adapters[i]
-            network = networks[i]
-
-            # Figure out the interface number by simple lookup
-            network[:interface] = adapter_to_interface[adapter[:adapter]]
-          end
+          # TODO: Configure running-VM networks
         end
 
         def hostonly_config(args)
           ip      = args[0]
-          options = args[1] || {}
-
-          # Determine if we're dealing with a static IP or a DHCP-served IP.
-          type    = ip == :dhcp ? :dhcp : :static
-
-          # Default IP is in the 20-bit private network block for DHCP based networks
-          ip = "172.28.128.1" if type == :dhcp
-
           options = {
-            :type    => type,
-            :ip      => ip,
-            :netmask => "255.255.255.0",
-            :adapter => nil,
-            :mac     => nil,
-            :name    => nil,
-            :auto_config => true
-          }.merge(options)
+            :netmask => "255.255.255.0"
+          }.merge(args[1] || {})
 
-          # Verify that this hostonly network wouldn't conflict with any
-          # bridged interfaces
-          verify_no_bridge_collision(options)
+          # Calculate our network address for the given IP/netmask
+          netaddr  = network_address(ip, options[:netmask])
 
-          # Get the network address and IP parts which are used for many
-          # default calculations
-          netaddr  = network_address(options[:ip], options[:netmask])
+          # Verify that a host-only network subnet would not collide
+          # with a bridged networking interface.
+          #
+          # If the subnets overlap in any way then the host only network
+          # will not work because the routing tables will force the
+          # traffic onto the real interface rather than the VirtualBox
+          # interface.
+          @env[:machine].provider.driver.read_bridged_interfaces.each do |interface|
+            that_netaddr = network_address(interface[:ip], interface[:netmask])
+            raise Vagrant::Errors::NetworkCollision if \
+              netaddr == that_netaddr && interface[:status] != "Down"
+          end
+
+          # Split the IP address into its components
           ip_parts = netaddr.split(".").map { |i| i.to_i }
 
-          # Calculate the adapter IP, which we assume is the IP ".1" at the
-          # end usually.
+          # Calculate the adapter IP, which we assume is the IP ".1" at
+          # the end usually.
           adapter_ip    = ip_parts.dup
           adapter_ip[3] += 1
           options[:adapter_ip] ||= adapter_ip.join(".")
 
-          if type == :dhcp
-            # Calculate the DHCP server IP, which is the network address
-            # with the final octet + 2. So "172.28.0.0" turns into "172.28.0.2"
-            dhcp_ip    = ip_parts.dup
-            dhcp_ip[3] += 2
-            options[:dhcp_ip] ||= dhcp_ip.join(".")
-
-            # Calculate the lower and upper bound for the DHCP server
-            dhcp_lower    = ip_parts.dup
-            dhcp_lower[3] += 3
-            options[:dhcp_lower] ||= dhcp_lower.join(".")
-
-            dhcp_upper    = ip_parts.dup
-            dhcp_upper[3] = 254
-            options[:dhcp_upper] ||= dhcp_upper.join(".")
-          end
-
-          # Return the hostonly network configuration
-          return options
+          return {
+            :adapter_ip => adapter_ip,
+            :ip         => ip,
+            :netmask    => options[:netmask],
+            :type       => :static
+          }
         end
 
         def hostonly_adapter(config)
-          @logger.debug("Searching for matching network: #{config[:ip]}")
-          interface = find_matching_hostonly_network(config)
+          @logger.info("Searching for matching hostonly network: #{config[:ip]}")
+          interface = hostonly_find_matching_network(config)
 
           if !interface
-            @logger.debug("Network not found. Creating if we can.")
+            @logger.info("Network not found. Creating if we can.")
 
-            # It is an error case if a specific name was given but the network
-            # doesn't exist.
+            # It is an error if a specific host only network name was specified
+            # but the network wasn't found.
             if config[:name]
               raise Vagrant::Errors::NetworkNotFound, :name => config[:name]
             end
 
-            # Otherwise, we create a new network and put the net network
-            # in the list of available networks so other network definitions
-            # can use it!
-            interface = create_hostonly_network(config)
-            @logger.debug("Created network: #{interface[:name]}")
-          end
-
-          if config[:type] == :dhcp
-            # Check that if there is a DHCP server attached on our interface,
-            # then it is identical. Otherwise, we can't set it.
-            if interface[:dhcp]
-              valid = interface[:dhcp][:ip] == config[:dhcp_ip] &&
-                interface[:dhcp][:lower] == config[:dhcp_lower] &&
-                interface[:dhcp][:upper] == config[:dhcp_upper]
-
-              raise Vagrant::Errors::NetworkDHCPAlreadyAttached if !valid
-
-              @logger.debug("DHCP server already properly configured")
-            else
-              # Configure the DHCP server for the network.
-              @logger.debug("Creating a DHCP server...")
-              @env[:machine].provider.driver.create_dhcp_server(interface[:name], config)
-            end
+            # Create a new network
+            interface = hostonly_create_network(config)
+            @logger.info("Created network: #{interface[:name]}")
           end
 
           return {
-            :adapter     => config[:adapter],
-            :type        => :hostonly,
-            :hostonly    => interface[:name],
-            :mac_address => config[:mac],
-            :nic_type    => config[:nic_type]
+            :adapter  => config[:adapter],
+            :type     => :hostonly,
+            :hostonly => interface[:name]
           }
         end
 
-        def hostonly_network_config(config)
+        def nat_config(options)
+          return {}
+        end
+
+        def nat_adapter(config)
           return {
-            :type       => config[:type],
+            :adapter => config[:adapter],
+            :type    => :nat,
+          }
+        end
+
+        #-----------------------------------------------------------------
+        # Hostonly Helper Functions
+        #-----------------------------------------------------------------
+        # This creates a host only network for the given configuration.
+        def hostonly_create_network(config)
+          @env[:machine].provider.driver.create_host_only_network(
             :adapter_ip => config[:adapter_ip],
-            :ip         => config[:ip],
             :netmask    => config[:netmask]
-          }
+          )
         end
 
-        # Creates a new hostonly network that matches the network requested
-        # by the given host-only network configuration.
-        def create_hostonly_network(config)
-          # Create the options that are going to be used to create our
-          # new network.
-          options = config.dup
-          options[:ip] = options[:adapter_ip]
-
-          @env[:machine].provider.driver.create_host_only_network(options)
-        end
-
-        # Finds a host only network that matches our configuration on VirtualBox.
-        # This will return nil if a matching network does not exist.
-        def find_matching_hostonly_network(config)
+        # This finds a matching host only network for the given configuration.
+        def hostonly_find_matching_network(config)
           this_netaddr = network_address(config[:ip], config[:netmask])
 
           @env[:machine].provider.driver.read_host_only_interfaces.each do |interface|
-            if config[:name] && config[:name] == interface[:name]
-              return interface
-            elsif this_netaddr == network_address(interface[:ip], interface[:netmask])
-              return interface
-            end
+            return interface if config[:name] && config[:name] == interface[:name]
+            return interface if this_netaddr == \
+              network_address(interface[:ip], interface[:netmask])
           end
 
           nil
         end
-
-        # Verifies that a host-only network subnet would not collide with
-        # a bridged networking interface.
-        #
-        # If the subnets overlap in any way then the host only network
-        # will not work because the routing tables will force the traffic
-        # onto the real interface rather than the virtualbox interface.
-        def verify_no_bridge_collision(options)
-          this_netaddr = network_address(options[:ip], options[:netmask])
-
-          @env[:machine].provider.driver.read_bridged_interfaces.each do |interface|
-            that_netaddr = network_address(interface[:ip], interface[:netmask])
-            raise Vagrant::Errors::NetworkCollision if this_netaddr == that_netaddr && interface[:status] != "Down"
-          end
-        end
-
-        def bridged_config(args)
-          options = args[0] || {}
-          options = {} if !options.is_a?(Hash)
-
-          return {
-            :adapter => nil,
-            :mac     => nil,
-            :bridge  => nil,
-            :auto_config => true,
-            :use_dhcp_assigned_default_route => false
-          }.merge(options)
-        end
-
-        def bridged_adapter(config)
-          # Find the bridged interfaces that are available
-          bridgedifs = @env[:machine].provider.driver.read_bridged_interfaces
-          bridgedifs.delete_if { |interface| interface[:status] == "Down" }
-
-          # The name of the chosen bridge interface will be assigned to this
-          # variable.
-          chosen_bridge = nil
-
-          if config[:bridge]
-            @logger.debug("Bridge was directly specified in config, searching for: #{config[:bridge]}")
-
-            # Search for a matching bridged interface
-            bridgedifs.each do |interface|
-              if interface[:name].downcase == config[:bridge].downcase
-                @logger.debug("Specific bridge found as configured in the Vagrantfile. Using it.")
-                chosen_bridge = interface[:name]
-                break
-              end
-            end
-
-            # If one wasn't found, then we notify the user here.
-            if !chosen_bridge
-              @env[:ui].info I18n.t("vagrant.actions.vm.bridged_networking.specific_not_found",
-                                    :bridge => config[:bridge])
-            end
-          end
-
-          # If we still don't have a bridge chosen (this means that one wasn't
-          # specified in the Vagrantfile, or the bridge specified in the Vagrantfile
-          # wasn't found), then we fall back to the normal means of searchign for a
-          # bridged network.
-          if !chosen_bridge
-            if bridgedifs.length == 1
-              # One bridgable interface? Just use it.
-              chosen_bridge = bridgedifs[0][:name]
-              @logger.debug("Only one bridged interface available. Using it by default.")
-            else
-              # More than one bridgable interface requires a user decision, so
-              # show options to choose from.
-              @env[:ui].info I18n.t("vagrant.actions.vm.bridged_networking.available",
-                                    :prefix => false)
-              bridgedifs.each_index do |index|
-                interface = bridgedifs[index]
-                @env[:ui].info("#{index + 1}) #{interface[:name]}", :prefix => false)
-              end
-
-              # The range of valid choices
-              valid = Range.new(1, bridgedifs.length)
-
-              # The choice that the user has chosen as the bridging interface
-              choice = nil
-              while !valid.include?(choice)
-                choice = @env[:ui].ask("What interface should the network bridge to? ")
-                choice = choice.to_i
-              end
-
-              chosen_bridge = bridgedifs[choice - 1][:name]
-            end
-          end
-
-          @logger.info("Bridging adapter #{config[:adapter]} to #{chosen_bridge}")
-
-          # Given the choice we can now define the adapter we're using
-          return {
-            :adapter     => config[:adapter],
-            :type        => :bridged,
-            :bridge      => chosen_bridge,
-            :mac_address => config[:mac],
-            :nic_type    => config[:nic_type]
-          }
-        end
-
-        def bridged_network_config(config)
-          return {
-            :type => :dhcp,
-            :use_dhcp_assigned_default_route => config[:use_dhcp_assigned_default_route]
-          }
-        end
       end
     end
   end
diff --git a/plugins/providers/virtualbox/action/network_old.rb b/plugins/providers/virtualbox/action/network_old.rb
new file mode 100644
index 000000000..31a6fa38d
--- /dev/null
+++ b/plugins/providers/virtualbox/action/network_old.rb
@@ -0,0 +1,404 @@
+require "set"
+
+require "log4r"
+
+require "vagrant/util/network_ip"
+
+module VagrantPlugins
+  module ProviderVirtualBox
+    module Action
+      class Network
+        # Utilities to deal with network addresses
+        include Vagrant::Util::NetworkIP
+
+        def initialize(app, env)
+          @logger = Log4r::Logger.new("vagrant::action::vm::network")
+
+          @app = app
+        end
+
+        def call(env)
+          @env = env
+
+          # First we have to get the array of adapters that we need
+          # to create on the virtual machine itself, as well as the
+          # driver-agnostic network configurations for each.
+          @logger.debug("Determining adapters and networks...")
+          adapters = []
+          networks = []
+          env[:machine].config.vm.networks.each do |type, args|
+            # Get the normalized configuration we'll use around
+            config = send("#{type}_config", args)
+
+            # Get the virtualbox adapter configuration
+            adapter = send("#{type}_adapter", config)
+            adapters << adapter
+
+            # Get the network configuration
+            network = send("#{type}_network_config", config)
+            network[:_auto_config] = true if config[:auto_config]
+            networks << network
+          end
+
+          if !adapters.empty?
+            # Automatically assign an adapter number to any adapters
+            # that aren't explicitly set.
+            @logger.debug("Assigning adapter locations...")
+            assign_adapter_locations(adapters)
+
+            # Verify that our adapters are good just prior to enabling them.
+            verify_adapters(adapters)
+
+            # Create all the network interfaces
+            @logger.info("Enabling adapters...")
+            env[:ui].info I18n.t("vagrant.actions.vm.network.preparing")
+            env[:machine].provider.driver.enable_adapters(adapters)
+          end
+
+          # Continue the middleware chain. We're done with our VM
+          # setup until after it is booted.
+          @app.call(env)
+
+          if !adapters.empty? && !networks.empty?
+            # Determine the interface numbers for the guest.
+            assign_interface_numbers(networks, adapters)
+
+            # Configure all the network interfaces on the guest. We only
+            # want to configure the networks that have `auto_config` setup.
+            networks_to_configure = networks.select { |n| n[:_auto_config] }
+            env[:ui].info I18n.t("vagrant.actions.vm.network.configuring")
+            env[:machine].guest.configure_networks(networks_to_configure)
+          end
+        end
+
+        # This method assigns the adapter to use for the adapter.
+        # e.g. it says that the first adapter is actually on the
+        # virtual machine's 2nd adapter location.
+        #
+        # It determines the adapter numbers by simply finding the
+        # "next available" in each case.
+        #
+        # The adapters are modified in place by adding an ":adapter"
+        # field to each.
+        def assign_adapter_locations(adapters)
+          available  = Set.new(1..8)
+
+          # Determine which NICs are actually available.
+          interfaces = @env[:machine].provider.driver.read_network_interfaces
+          interfaces.each do |number, nic|
+            # Remove the number from the available NICs if the
+            # NIC is in use.
+            available.delete(number) if nic[:type] != :none
+          end
+
+          # Based on the available set, assign in order to
+          # the adapters.
+          available = available.to_a.sort
+          @logger.debug("Available NICs: #{available.inspect}")
+          adapters.each do |adapter|
+            # Ignore the adapters that already have been assigned
+            if !adapter[:adapter]
+              # If we have no available adapters, then that is an exceptional
+              # event.
+              raise Vagrant::Errors::NetworkNoAdapters if available.empty?
+
+              # Otherwise, assign as the adapter the next available item
+              adapter[:adapter] = available.shift
+            end
+          end
+        end
+
+        # Verifies that the adapter configurations look good. This will
+        # raise an exception in the case that any errors occur.
+        def verify_adapters(adapters)
+          # Verify that there are no collisions in the adapters being used.
+          used = Set.new
+          adapters.each do |adapter|
+            raise Vagrant::Errors::NetworkAdapterCollision if used.include?(adapter[:adapter])
+            used.add(adapter[:adapter])
+          end
+        end
+
+        # Assigns the actual interface number of a network based on the
+        # enabled NICs on the virtual machine.
+        #
+        # This interface number is used by the guest to configure the
+        # NIC on the guest VM.
+        #
+        # The networks are modified in place by adding an ":interface"
+        # field to each.
+        def assign_interface_numbers(networks, adapters)
+          current = 0
+          adapter_to_interface = {}
+
+          # Make a first pass to assign interface numbers by adapter location
+          vm_adapters = @env[:machine].provider.driver.read_network_interfaces
+          vm_adapters.sort.each do |number, adapter|
+            if adapter[:type] != :none
+              # Not used, so assign the interface number and increment
+              adapter_to_interface[number] = current
+              current += 1
+            end
+          end
+
+          # Make a pass through the adapters to assign the :interface
+          # key to each network configuration.
+          adapters.each_index do |i|
+            adapter = adapters[i]
+            network = networks[i]
+
+            # Figure out the interface number by simple lookup
+            network[:interface] = adapter_to_interface[adapter[:adapter]]
+          end
+        end
+
+        def hostonly_config(args)
+          ip      = args[0]
+          options = args[1] || {}
+
+          # Determine if we're dealing with a static IP or a DHCP-served IP.
+          type    = ip == :dhcp ? :dhcp : :static
+
+          # Default IP is in the 20-bit private network block for DHCP based networks
+          ip = "172.28.128.1" if type == :dhcp
+
+          options = {
+            :type    => type,
+            :ip      => ip,
+            :netmask => "255.255.255.0",
+            :adapter => nil,
+            :mac     => nil,
+            :name    => nil,
+            :auto_config => true
+          }.merge(options)
+
+          # Verify that this hostonly network wouldn't conflict with any
+          # bridged interfaces
+          verify_no_bridge_collision(options)
+
+          # Get the network address and IP parts which are used for many
+          # default calculations
+          netaddr  = network_address(options[:ip], options[:netmask])
+          ip_parts = netaddr.split(".").map { |i| i.to_i }
+
+          # Calculate the adapter IP, which we assume is the IP ".1" at the
+          # end usually.
+          adapter_ip    = ip_parts.dup
+          adapter_ip[3] += 1
+          options[:adapter_ip] ||= adapter_ip.join(".")
+
+          if type == :dhcp
+            # Calculate the DHCP server IP, which is the network address
+            # with the final octet + 2. So "172.28.0.0" turns into "172.28.0.2"
+            dhcp_ip    = ip_parts.dup
+            dhcp_ip[3] += 2
+            options[:dhcp_ip] ||= dhcp_ip.join(".")
+
+            # Calculate the lower and upper bound for the DHCP server
+            dhcp_lower    = ip_parts.dup
+            dhcp_lower[3] += 3
+            options[:dhcp_lower] ||= dhcp_lower.join(".")
+
+            dhcp_upper    = ip_parts.dup
+            dhcp_upper[3] = 254
+            options[:dhcp_upper] ||= dhcp_upper.join(".")
+          end
+
+          # Return the hostonly network configuration
+          return options
+        end
+
+        def hostonly_adapter(config)
+          @logger.debug("Searching for matching network: #{config[:ip]}")
+          interface = find_matching_hostonly_network(config)
+
+          if !interface
+            @logger.debug("Network not found. Creating if we can.")
+
+            # It is an error case if a specific name was given but the network
+            # doesn't exist.
+            if config[:name]
+              raise Vagrant::Errors::NetworkNotFound, :name => config[:name]
+            end
+
+            # Otherwise, we create a new network and put the net network
+            # in the list of available networks so other network definitions
+            # can use it!
+            interface = create_hostonly_network(config)
+            @logger.debug("Created network: #{interface[:name]}")
+          end
+
+          if config[:type] == :dhcp
+            # Check that if there is a DHCP server attached on our interface,
+            # then it is identical. Otherwise, we can't set it.
+            if interface[:dhcp]
+              valid = interface[:dhcp][:ip] == config[:dhcp_ip] &&
+                interface[:dhcp][:lower] == config[:dhcp_lower] &&
+                interface[:dhcp][:upper] == config[:dhcp_upper]
+
+              raise Vagrant::Errors::NetworkDHCPAlreadyAttached if !valid
+
+              @logger.debug("DHCP server already properly configured")
+            else
+              # Configure the DHCP server for the network.
+              @logger.debug("Creating a DHCP server...")
+              @env[:machine].provider.driver.create_dhcp_server(interface[:name], config)
+            end
+          end
+
+          return {
+            :adapter     => config[:adapter],
+            :type        => :hostonly,
+            :hostonly    => interface[:name],
+            :mac_address => config[:mac],
+            :nic_type    => config[:nic_type]
+          }
+        end
+
+        def hostonly_network_config(config)
+          return {
+            :type       => config[:type],
+            :adapter_ip => config[:adapter_ip],
+            :ip         => config[:ip],
+            :netmask    => config[:netmask]
+          }
+        end
+
+        # Creates a new hostonly network that matches the network requested
+        # by the given host-only network configuration.
+        def create_hostonly_network(config)
+          # Create the options that are going to be used to create our
+          # new network.
+          options = config.dup
+          options[:ip] = options[:adapter_ip]
+
+          @env[:machine].provider.driver.create_host_only_network(options)
+        end
+
+        # Finds a host only network that matches our configuration on VirtualBox.
+        # This will return nil if a matching network does not exist.
+        def find_matching_hostonly_network(config)
+          this_netaddr = network_address(config[:ip], config[:netmask])
+
+          @env[:machine].provider.driver.read_host_only_interfaces.each do |interface|
+            if config[:name] && config[:name] == interface[:name]
+              return interface
+            elsif this_netaddr == network_address(interface[:ip], interface[:netmask])
+              return interface
+            end
+          end
+
+          nil
+        end
+
+        # Verifies that a host-only network subnet would not collide with
+        # a bridged networking interface.
+        #
+        # If the subnets overlap in any way then the host only network
+        # will not work because the routing tables will force the traffic
+        # onto the real interface rather than the virtualbox interface.
+        def verify_no_bridge_collision(options)
+          this_netaddr = network_address(options[:ip], options[:netmask])
+
+          @env[:machine].provider.driver.read_bridged_interfaces.each do |interface|
+            that_netaddr = network_address(interface[:ip], interface[:netmask])
+            raise Vagrant::Errors::NetworkCollision if this_netaddr == that_netaddr && interface[:status] != "Down"
+          end
+        end
+
+        def bridged_config(args)
+          options = args[0] || {}
+          options = {} if !options.is_a?(Hash)
+
+          return {
+            :adapter => nil,
+            :mac     => nil,
+            :bridge  => nil,
+            :auto_config => true,
+            :use_dhcp_assigned_default_route => false
+          }.merge(options)
+        end
+
+        def bridged_adapter(config)
+          # Find the bridged interfaces that are available
+          bridgedifs = @env[:machine].provider.driver.read_bridged_interfaces
+          bridgedifs.delete_if { |interface| interface[:status] == "Down" }
+
+          # The name of the chosen bridge interface will be assigned to this
+          # variable.
+          chosen_bridge = nil
+
+          if config[:bridge]
+            @logger.debug("Bridge was directly specified in config, searching for: #{config[:bridge]}")
+
+            # Search for a matching bridged interface
+            bridgedifs.each do |interface|
+              if interface[:name].downcase == config[:bridge].downcase
+                @logger.debug("Specific bridge found as configured in the Vagrantfile. Using it.")
+                chosen_bridge = interface[:name]
+                break
+              end
+            end
+
+            # If one wasn't found, then we notify the user here.
+            if !chosen_bridge
+              @env[:ui].info I18n.t("vagrant.actions.vm.bridged_networking.specific_not_found",
+                                    :bridge => config[:bridge])
+            end
+          end
+
+          # If we still don't have a bridge chosen (this means that one wasn't
+          # specified in the Vagrantfile, or the bridge specified in the Vagrantfile
+          # wasn't found), then we fall back to the normal means of searchign for a
+          # bridged network.
+          if !chosen_bridge
+            if bridgedifs.length == 1
+              # One bridgable interface? Just use it.
+              chosen_bridge = bridgedifs[0][:name]
+              @logger.debug("Only one bridged interface available. Using it by default.")
+            else
+              # More than one bridgable interface requires a user decision, so
+              # show options to choose from.
+              @env[:ui].info I18n.t("vagrant.actions.vm.bridged_networking.available",
+                                    :prefix => false)
+              bridgedifs.each_index do |index|
+                interface = bridgedifs[index]
+                @env[:ui].info("#{index + 1}) #{interface[:name]}", :prefix => false)
+              end
+
+              # The range of valid choices
+              valid = Range.new(1, bridgedifs.length)
+
+              # The choice that the user has chosen as the bridging interface
+              choice = nil
+              while !valid.include?(choice)
+                choice = @env[:ui].ask("What interface should the network bridge to? ")
+                choice = choice.to_i
+              end
+
+              chosen_bridge = bridgedifs[choice - 1][:name]
+            end
+          end
+
+          @logger.info("Bridging adapter #{config[:adapter]} to #{chosen_bridge}")
+
+          # Given the choice we can now define the adapter we're using
+          return {
+            :adapter     => config[:adapter],
+            :type        => :bridged,
+            :bridge      => chosen_bridge,
+            :mac_address => config[:mac],
+            :nic_type    => config[:nic_type]
+          }
+        end
+
+        def bridged_network_config(config)
+          return {
+            :type => :dhcp,
+            :use_dhcp_assigned_default_route => config[:use_dhcp_assigned_default_route]
+          }
+        end
+      end
+    end
+  end
+end
diff --git a/plugins/providers/virtualbox/config.rb b/plugins/providers/virtualbox/config.rb
index c71c2f4d9..0897d4ab3 100644
--- a/plugins/providers/virtualbox/config.rb
+++ b/plugins/providers/virtualbox/config.rb
@@ -1,14 +1,28 @@
 module VagrantPlugins
   module ProviderVirtualBox
     class Config < Vagrant.plugin("2", :config)
+      # An array of customizations to make on the VM prior to booting it.
+      #
+      # @return [Array]
       attr_reader :customizations
 
       # If set to `true`, then VirtualBox will be launched with a GUI.
+      #
+      # @return [Boolean]
       attr_accessor :gui
 
+      # The defined network adapters.
+      #
+      # @return [Hash]
+      attr_reader :network_adapters
+
       def initialize
-        @customizations = []
-        @gui = UNSET_VALUE
+        @customizations   = []
+        @network_adapters = {}
+        @gui              = UNSET_VALUE
+
+        # We require that network adapter 1 is a NAT device.
+        network_adapter(1, :nat)
       end
 
       # Customize the VM by calling `VBoxManage` with the given
@@ -27,6 +41,15 @@ module VagrantPlugins
         @customizations << command
       end
 
+      # This defines a network adapter that will be added to the VirtualBox
+      # virtual machine in the given slot.
+      #
+      # @param [Integer] slot The slot for this network adapter.
+      # @param [Symbol] type The type of adapter.
+      def network_adapter(slot, type, *args)
+        @network_adapters[slot] = [type, args]
+      end
+
       # This is the hook that is called to finalize the object before it
       # is put into use.
       def finalize!