From f5ef0b01a8262243f433ec120da11e522b98d46e Mon Sep 17 00:00:00 2001
From: Greg Osuri <gosuri@gmail.com>
Date: Tue, 15 Dec 2015 19:09:23 -0800
Subject: [PATCH] Vagrantfile: enable NAT engine to use host's resolver

VirualBox fails to resolve external hosts on some machines. Handle cases
when the host is behind a private network by making the NAT engine use the
host's resolver mechanisms to handle DNS requests.
---
 Vagrantfile | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/Vagrantfile b/Vagrantfile
index a2759440c..de259a0dc 100644
--- a/Vagrantfile
+++ b/Vagrantfile
@@ -21,6 +21,10 @@ Vagrant.configure(VAGRANTFILE_API_VERSION) do |config|
       # Cannot allocate memory" when running
       # letsencrypt.client.tests.display.util_test.NcursesDisplayTest
       v.memory = 1024
+
+      # Handle cases when the host is behind a private network by making the 
+      # NAT engine use the host's resolver mechanisms to handle DNS requests.
+      v.customize ["modifyvm", :id, "--natdnshostresolver1", "on"]
     end
   end