TrustProxies.php

class TrustProxies extends Middleware
{
     /**
     * The trusted proxies for this application.
     *
     * @var array|string
     */
    protected $proxies = '*';

    /**
     * The headers that should be used to detect proxies.
     *
     * @var int
     */
    protected $headers = Request::HEADER_X_FORWARDED_AWS_ELB;
}