diff --git a/lib/vagrant/action.rb b/lib/vagrant/action.rb
index 265ccbe2b..a94dcf43d 100644
--- a/lib/vagrant/action.rb
+++ b/lib/vagrant/action.rb
@@ -33,7 +33,6 @@ module Vagrant
       autoload :CleanMachineFolder,  'vagrant/action/vm/clean_machine_folder'
       autoload :ClearForwardedPorts, 'vagrant/action/vm/clear_forwarded_ports'
       autoload :ClearNetworkInterfaces, 'vagrant/action/vm/clear_network_interfaces'
-      autoload :ClearNFSExports,     'vagrant/action/vm/clear_nfs_exports'
       autoload :ClearSharedFolders,  'vagrant/action/vm/clear_shared_folders'
       autoload :Customize,           'vagrant/action/vm/customize'
       autoload :Destroy,             'vagrant/action/vm/destroy'
@@ -51,6 +50,7 @@ module Vagrant
       autoload :PackageVagrantfile,  'vagrant/action/vm/package_vagrantfile'
       autoload :Provision,           'vagrant/action/vm/provision'
       autoload :ProvisionerCleanup,  'vagrant/action/vm/provisioner_cleanup'
+      autoload :PruneNFSExports,     'vagrant/action/vm/prune_nfs_exports'
       autoload :Resume,              'vagrant/action/vm/resume'
       autoload :ShareFolders,        'vagrant/action/vm/share_folders'
       autoload :SetupPackageFiles,   'vagrant/action/vm/setup_package_files'
diff --git a/lib/vagrant/action/builtin.rb b/lib/vagrant/action/builtin.rb
index 6ae1a9f1b..539255b49 100644
--- a/lib/vagrant/action/builtin.rb
+++ b/lib/vagrant/action/builtin.rb
@@ -25,6 +25,7 @@ module Vagrant
           use VM::CheckPortCollisions, :port_collision_handler => :correct
           use VM::ForwardPorts
           use VM::Provision
+          use VM::PruneNFSExports
           use VM::NFS
           use VM::ClearSharedFolders
           use VM::ShareFolders
@@ -96,7 +97,7 @@ module Vagrant
           use VM::CheckAccessible
           use registry.get(:halt), :force => true
           use VM::ProvisionerCleanup
-          use VM::ClearNFSExports
+          use VM::PruneNFSExports
           use VM::Destroy
           use VM::CleanMachineFolder
           use VM::DestroyUnusedNetworkInterfaces
diff --git a/lib/vagrant/action/vm/nfs.rb b/lib/vagrant/action/vm/nfs.rb
index 0fcb91253..9d31ebf4b 100644
--- a/lib/vagrant/action/vm/nfs.rb
+++ b/lib/vagrant/action/vm/nfs.rb
@@ -1,5 +1,3 @@
-require File.expand_path("../nfs_helpers", __FILE__)
-
 module Vagrant
   module Action
     module VM
@@ -32,7 +30,6 @@ module Vagrant
 
           if !folders.empty?
             prepare_folders
-            clear_nfs_exports(env)
             export_folders
           end
 
diff --git a/lib/vagrant/action/vm/nfs_helpers.rb b/lib/vagrant/action/vm/nfs_helpers.rb
deleted file mode 100644
index 6d48fb1ae..000000000
--- a/lib/vagrant/action/vm/nfs_helpers.rb
+++ /dev/null
@@ -1,11 +0,0 @@
-module Vagrant
-  module Action
-    module VM
-      module NFSHelpers
-        def clear_nfs_exports(env)
-          env[:host].nfs_cleanup(env[:vm].uuid) if env[:host]
-        end
-      end
-    end
-  end
-end
diff --git a/lib/vagrant/action/vm/clear_nfs_exports.rb b/lib/vagrant/action/vm/prune_nfs_exports.rb
similarity index 55%
rename from lib/vagrant/action/vm/clear_nfs_exports.rb
rename to lib/vagrant/action/vm/prune_nfs_exports.rb
index 33b5e2aa7..b8b3b3061 100644
--- a/lib/vagrant/action/vm/clear_nfs_exports.rb
+++ b/lib/vagrant/action/vm/prune_nfs_exports.rb
@@ -1,17 +1,17 @@
-require File.expand_path("../nfs_helpers", __FILE__)
-
 module Vagrant
   module Action
     module VM
-      class ClearNFSExports
-        include NFSHelpers
-
+      class PruneNFSExports
         def initialize(app, env)
           @app = app
         end
 
         def call(env)
-          clear_nfs_exports(env)
+          if env[:host]
+            valid_ids = env[:vm].driver.read_vms
+            env[:host].nfs_prune(valid_ids)
+          end
+
           @app.call(env)
         end
       end
diff --git a/lib/vagrant/driver/virtualbox.rb b/lib/vagrant/driver/virtualbox.rb
index 23da30002..5657643c2 100644
--- a/lib/vagrant/driver/virtualbox.rb
+++ b/lib/vagrant/driver/virtualbox.rb
@@ -92,6 +92,7 @@ module Vagrant
                                :read_network_interfaces,
                                :read_state,
                                :read_used_ports,
+                               :read_vms,
                                :set_mac_address,
                                :share_folders,
                                :ssh_port,
diff --git a/lib/vagrant/driver/virtualbox_4_0.rb b/lib/vagrant/driver/virtualbox_4_0.rb
index b419aca3a..638738f25 100644
--- a/lib/vagrant/driver/virtualbox_4_0.rb
+++ b/lib/vagrant/driver/virtualbox_4_0.rb
@@ -350,6 +350,17 @@ module Vagrant
         ports
       end
 
+      def read_vms
+        results = []
+        execute("list", "vms").split("\n").each do |line|
+          if line =~ /^".+?" \{(.+?)\}$/
+            results << $1.to_s
+          end
+        end
+
+        results
+      end
+
       def set_mac_address(mac)
         execute("modifyvm", @uuid, "--macaddress1", mac)
       end
@@ -362,6 +373,8 @@ module Vagrant
       end
 
       def ssh_port(expected_port)
+        @logger.debug("Searching for SSH port: #{expected_port.inspect}")
+
         # Look for the forwarded port only by comparing the guest port
         read_forwarded_ports.each do |_, _, hostport, guestport|
           return hostport if guestport == expected_port
diff --git a/lib/vagrant/driver/virtualbox_4_1.rb b/lib/vagrant/driver/virtualbox_4_1.rb
index babfb994e..1d3dd5354 100644
--- a/lib/vagrant/driver/virtualbox_4_1.rb
+++ b/lib/vagrant/driver/virtualbox_4_1.rb
@@ -350,6 +350,17 @@ module Vagrant
         ports
       end
 
+      def read_vms
+        results = []
+        execute("list", "vms").split("\n").each do |line|
+          if line =~ /^".+?" \{(.+?)\}$/
+            results << $1.to_s
+          end
+        end
+
+        results
+      end
+
       def set_mac_address(mac)
         execute("modifyvm", @uuid, "--macaddress1", mac)
       end
diff --git a/lib/vagrant/driver/virtualbox_base.rb b/lib/vagrant/driver/virtualbox_base.rb
index bd52e4561..a3f72eee0 100644
--- a/lib/vagrant/driver/virtualbox_base.rb
+++ b/lib/vagrant/driver/virtualbox_base.rb
@@ -197,6 +197,13 @@ module Vagrant
       def read_used_ports
       end
 
+      # Returns a list of all UUIDs of virtual machines currently
+      # known by VirtualBox.
+      #
+      # @return [Array<String>]
+      def read_vms
+      end
+
       # Sets the MAC address of the first network adapter.
       #
       # @param [String] mac MAC address without any spaces/hyphens.
diff --git a/lib/vagrant/hosts/base.rb b/lib/vagrant/hosts/base.rb
index 7c7868d5e..f70fb0818 100644
--- a/lib/vagrant/hosts/base.rb
+++ b/lib/vagrant/hosts/base.rb
@@ -54,10 +54,12 @@ module Vagrant
       def nfs_export(id, ip, folders)
       end
 
-      # Cleans up the exports for the given ID.
+      # Prunes any NFS exports made by Vagrant which aren't in the set
+      # of valid ids given.
       #
-      # @param [String] id A unique ID to identify the folder set to cleanup.
-      def nfs_cleanup(id)
+      # @param [Array<String>] valid_ids Valid IDs that should not be
+      #   pruned.
+      def nfs_prune(valid_ids)
       end
     end
   end
diff --git a/lib/vagrant/hosts/bsd.rb b/lib/vagrant/hosts/bsd.rb
index da79a3422..26cde0ed8 100644
--- a/lib/vagrant/hosts/bsd.rb
+++ b/lib/vagrant/hosts/bsd.rb
@@ -1,3 +1,5 @@
+require 'log4r'
+
 require 'vagrant/util/platform'
 
 module Vagrant
@@ -20,6 +22,7 @@ module Vagrant
       def initialize(*args)
         super
 
+        @logger = Log4r::Logger.new("vagrant::hosts::bsd")
         @nfs_restart_command = "sudo nfsd restart"
       end
 
@@ -40,9 +43,11 @@ module Vagrant
         @ui.info I18n.t("vagrant.hosts.bsd.nfs_export.prepare")
         sleep 0.5
 
+        # First, clean up the old entry
+        nfs_cleanup(id)
+
+        # Output the rendered template into the exports
         output.split("\n").each do |line|
-          # This should only ask for administrative permission once, even
-          # though its executed in multiple subshells.
           line = line.gsub('"', '\"')
           system(%Q[sudo su root -c "echo '#{line}' >> /etc/exports"])
         end
@@ -52,15 +57,29 @@ module Vagrant
         system(@nfs_restart_command)
       end
 
+      def nfs_prune(valid_ids)
+        @logger.info("Pruning invalid NFS entries...")
+
+        File.read("/etc/exports").lines.each do |line|
+          if line =~ /^# VAGRANT-BEGIN: (.+?)$/
+            if valid_ids.include?($1.to_s)
+              @logger.debug("Valid ID: #{$1.to_s}")
+            else
+              @logger.info("Invalid ID, pruning: #{$1.to_s}")
+              nfs_cleanup($1.to_s)
+            end
+          end
+        end
+      end
+
+      protected
+
       def nfs_cleanup(id)
         return if !File.exist?("/etc/exports")
 
-        retryable(:tries => 10, :on => TypeError) do
-          # Use sed to just strip out the block of code which was inserted
-          # by Vagrant, and restart NFS.
-          system("sudo sed -e '/^# VAGRANT-BEGIN: #{id}/,/^# VAGRANT-END: #{id}/ d' -ibak /etc/exports")
-          system(@nfs_restart_command)
-        end
+        # Use sed to just strip out the block of code which was inserted
+        # by Vagrant, and restart NFS.
+        system("sudo sed -e '/^# VAGRANT-BEGIN: #{id}/,/^# VAGRANT-END: #{id}/ d' -ibak /etc/exports")
       end
     end
   end
diff --git a/lib/vagrant/hosts/linux.rb b/lib/vagrant/hosts/linux.rb
index c6e4a755d..59784dd40 100644
--- a/lib/vagrant/hosts/linux.rb
+++ b/lib/vagrant/hosts/linux.rb
@@ -1,3 +1,5 @@
+require 'log4r'
+
 require 'vagrant/util/platform'
 
 module Vagrant
@@ -20,6 +22,7 @@ module Vagrant
       def initialize(*args)
         super
 
+        @logger = Log4r::Logger.new("vagrant::hosts::linux")
         @nfs_server_binary = "/etc/init.d/nfs-kernel-server"
       end
 
@@ -39,6 +42,8 @@ module Vagrant
         @ui.info I18n.t("vagrant.hosts.linux.nfs_export.prepare")
         sleep 0.5
 
+        nfs_cleanup(id)
+
         output.split("\n").each do |line|
           # This should only ask for administrative permission once, even
           # though its executed in multiple subshells.
@@ -50,6 +55,23 @@ module Vagrant
         system("sudo #{@nfs_server_binary} restart")
       end
 
+      def nfs_prune(valid_ids)
+        @logger.info("Pruning invalid NFS entries...")
+
+        File.read("/etc/exports").lines.each do |line|
+          if line =~ /^# VAGRANT-BEGIN: (.+?)$/
+            if valid_ids.include?($1.to_s)
+              @logger.debug("Valid ID: #{$1.to_s}")
+            else
+              @logger.info("Invalid ID, pruning: #{$1.to_s}")
+              nfs_cleanup($1.to_s)
+            end
+          end
+        end
+      end
+
+      protected
+
       def nfs_cleanup(id)
         return if !File.exist?("/etc/exports")