By default, Laravel will respond to all requests it receives regardless of the content of the HTTP request's Host header. In addition, the Host header's value will be used when generating absolute URLs to your application during a web request. Typically, you should configure your web server, such as Nginx or Apache, to only send requests to your application that match a given hostname. However, if you do not have the ability to customize your web server directly and need to instruct Laravel to only respond to certain hostnames, you may do so by enabling the Illuminate\Http\Middleware\TrustHosts middleware for your application. To enable the TrustHosts middleware, you should invoke the trustHosts middleware method in your application's bootstrap/app.php file. Using the at argument of this method, you may specify the hostnames that your application should respond to. Incoming requests with other Host headers will be rejected: