Laravel 5 CloudFlare Proxy Middleware Compatibility

app\Http\Kernel.php

<?php
// ...
	protected $middleware = [
		// ...
		'App\Http\Middleware\CloudFlareProxies',
	];
// ...

app\Http\Middleware\CloudFlareProxies.php

<?php namespace App\Http\Middleware;

use Closure;

class CloudFlareProxies {

	/**
	 * Handle an incoming request.
	 *
	 * @param  \Illuminate\Http\Request  $request
	 * @param  \Closure  $next
	 * @return mixed
	 */
	public function handle($request, Closure $next)
	{
		// Proxies obtained from https://www.cloudflare.com/ips-v4
		$request->setTrustedProxies([
			'199.27.128.0/21',
			'173.245.48.0/20',
			'103.21.244.0/22',
			'103.22.200.0/22',
			'103.31.4.0/22',
			'141.101.64.0/18',
			'108.162.192.0/18',
			'190.93.240.0/20',
			'188.114.96.0/20',
			'197.234.240.0/22',
			'198.41.128.0/17',
			'162.158.0.0/15',
			'104.16.0.0/12'
		]);

		return $next($request);
	}
}

Try this for automatic updates:

    /**
     * Handle an incoming request.
     *
     * @param  \Illuminate\Http\Request  $request
     * @param  \Closure  $next
     * @return mixed
     */
    public function handle($request, Closure $next)
    {
        $proxyIps = Cache::remember('cloudFlareProxyIps', 1440, function () {
            $url = 'https://www.cloudflare.com/ips-v4';
            $ips = file_get_contents($url);
            return array_filter(explode("\n", $ips));
        });

        $request->setTrustedProxies($proxyIps);

        return $next($request);
    }