Raise a proper SSH error on ECONNRESET

lib/vagrant/errors.rb

@@ -339,6 +339,10 @@ module Vagrant
       error_key(:ssh_connection_refused)
     end
 
+    class SSHConnectionReset < VagrantError
+      error_key(:ssh_connection_reset)
+    end
+
     class SSHConnectionTimeout < VagrantError
       error_key(:ssh_connection_timeout)
     end

plugins/communicators/ssh/communicator.rb

@@ -215,6 +215,10 @@ module VagrantPlugins
         rescue Errno::ECONNREFUSED
           # This is raised if we failed to connect the max amount of times
           raise Vagrant::Errors::SSHConnectionRefused
+        rescue Errno::ECONNRESET
+          # This is raised if we failed to connect the max number of times
+          # due to an ECONNRESET.
+          raise Vagrant::Errors::SSHConnectionReset
         rescue Errno::EHOSTDOWN
           # This is raised if we get an ICMP DestinationUnknown error.
           raise Vagrant::Errors::SSHHostDown

templates/locales/en.yml

@@ -235,6 +235,13 @@ en:
         If that doesn't work, destroy your VM and recreate it with a `vagrant destroy`
         followed by a `vagrant up`. If that doesn't work, contact a Vagrant
         maintainer (support channels listed on the website) for more assistance.
+      ssh_connection_reset: |-
+        SSH connection was reset! This usually happens when the machine is
+        taking too long to reboot. First, try reloading your machine with
+        `vagrant reload`, since a simple restart sometimes fixes things.
+        If that doesn't work, destroy your machine and recreate it with
+        a `vagrant destroy` followed by a `1vagrant up`. If that doesn't work,
+        contact support.
       ssh_connection_timeout: |-
         Vagrant timed out while attempting to connect via SSH. This usually
         means that the VM booted, but there are issues with the SSH configuration