```ruby
require 'stacks/environment'

describe Stacks::NatServer do

  subject do

    class Group
      attr_accessor :name

      def initialize(name)
        @name = name
      end
    end

    Stacks::NatServer.new(Group.new("my-nat-server"), "001")
  end

  it 'has access to the front, prod and mgmt networks' do

    subject.to_specs[0][:networks].should eql [:mgmt,:prod,:front]
  end
end
```

Fix nat server spec, must be bound to env
user
```ruby
require 'stacks/environment'

describe Stacks::NatServer do

  it 'has access to the front, prod and mgmt networks' do
    class Group
      attr_accessor :name
      def initialize(name)
        @name = name
      end
    end
    machinedef = Stacks::NatServer.new(Group.new("my-nat-server"), "001")
    #machinedef = Stacks::MachineDef.new("test")
    env = Stacks::Environment.new("noenv", {:primary_site=>"local"}, {})
    machinedef.bind_to(env)
    machinedef.to_spec[:networks].should eql [:mgmt,:prod,:front]
  end
end
```
assistant