ldc-web/app/Http/Middleware/LDCNetwork.php

<?php

namespace App\Http\Middleware;

use Closure;

class LDCNetwork
{
    /**
     * Handle an incoming request.
     *
     * @param  \Illuminate\Http\Request $request
     * @param  \Closure                 $next
     * @return mixed
     */
    public function handle($request, Closure $next)
    {
        // IpUtils::checkIp();
        // https://github.com/symfony/http-foundation/blob/master/IpUtils.php#L36
        return $next($request);
    }
}