gistfile1.rb

App::Application.routes.draw do
  scope module: 'company', constraints: ValidSubdomain do
    root to: "home#index"

    match 'login' => 'sessions#new', as: :login
    match 'logout' => 'sessions#destroy', as: :logout
  end

  scope module: 'invalid_subdomain', constraints: InvalidSubdomain do
    match '/*path' => 'home#index'

    root to: 'home#index'
  end

  match 'login' => 'sessions#new', as: :login
  match 'logout' => 'sessions#destroy', as: :logout

  root to: "home#index"
end