diff --git a/CHANGELOG.md b/CHANGELOG.md
index 3a75615f0..02dea2804 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -20,6 +20,9 @@
   - All Vagrant commands that take a VM name in a Multi-VM environment
     can now be given a regular expression. If the name starts and ends with a "/"
     then it is assumed to be a regular expression. [GH-573]
+  - Added a "--plain" flag to `vagrant ssh` which will cause Vagrant to not
+    perform any authentication. It will simply `ssh` into the proper IP and
+    port of the virtual machine.
   - Removed Thor as a dependency for the command line interfaces. This resulted
     in general speed increases across all command line commands.
   - Linux uses `shutdown -h` instead of `halt` to hopefully more consistently
diff --git a/lib/vagrant/command/ssh.rb b/lib/vagrant/command/ssh.rb
index f96d073f6..41f597255 100644
--- a/lib/vagrant/command/ssh.rb
+++ b/lib/vagrant/command/ssh.rb
@@ -14,11 +14,8 @@ module Vagrant
           opts.on("-c", "--command COMMAND", "Execute an SSH command directly.") do |c|
             options[:command] = c
           end
-          opts.on(
-            "-p",
-            "Act more like vanilla 'ssh <vm>'"
-          ) do |p|
-            options[:port_only] = p
+          opts.on("-p", "--plain", "Plain mode, leaves authentication up to user.") do |p|
+            options[:plain_mode] = p
           end
         end
 
@@ -35,7 +32,7 @@ module Vagrant
           if options[:command]
             ssh_execute(vm, options[:command])
           else
-            ssh_connect(vm, {:port_only => options[:port_only]})
+            ssh_connect(vm, { :plain_mode => options[:plain_mode] })
           end
         end
       end
diff --git a/lib/vagrant/ssh.rb b/lib/vagrant/ssh.rb
index 6cca0b272..4754acd5c 100644
--- a/lib/vagrant/ssh.rb
+++ b/lib/vagrant/ssh.rb
@@ -33,7 +33,10 @@ module Vagrant
 
       raise Errors::SSHUnavailable if !Kernel.system("which ssh > /dev/null 2>&1")
 
-      port_only = opts[:port_only]
+      # If plain mode is enabled then we don't do any authentication (we don't
+      # set a user or an identity file)
+      plain_mode = options[:plain_mode]
+
       options = {}
       options[:port] = port(opts)
       options[:private_key_path] = private_key_path
@@ -47,7 +50,7 @@ module Vagrant
       command_options = ["-p #{options[:port]}", "-o UserKnownHostsFile=/dev/null",
                          "-o StrictHostKeyChecking=no", "-o IdentitiesOnly=yes",
                          "-o LogLevel=ERROR"]
-      command_options << "-i #{options[:private_key_path]}" unless port_only
+      command_options << "-i #{options[:private_key_path]}" if !plain_mode
       command_options << "-o ForwardAgent=yes" if @vm.config.ssh.forward_agent
 
       if @vm.config.ssh.forward_x11
@@ -57,7 +60,7 @@ module Vagrant
       end
 
       host_string = options[:host]
-      host_string = "#{options[:username]}@" + host_string unless port_only
+      host_string = "#{options[:username]}@#{host_string}" if !plain_mode
       command = "ssh #{command_options.join(" ")} #{host_string}".strip
       @logger.info("Invoking SSH: #{command}")
       safe_exec(command)