Laravel 5.1.40 (LTS) HTTPS Load Balancer ValidProxies

app\Http\Kernel.php

<?php
// ...
	protected $middleware = [
		// ...
		\FI\Http\Middleware\ValidProxies::class,
	];
// ...

app\Http\Middleware\ValidProxies.php

<?php namespace FI\Http\Middleware;

use Closure;

class ValidProxies {

	/**
	 * Handle an incoming request.
	 *
	 * @param  \Illuminate\Http\Request  $request
	 * @param  \Closure  $next
	 * @return mixed
	 */
	public function handle($request, Closure $next)
	{
		// Proxies
		$request->setTrustedProxies([ $request->getClientIp() ]);

		return $next($request);
	}
}

Had some troubles with the original version - possibly meant for older or newer Laravel. This is tested with HAProxy + FusionInvoice.