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

<?php

namespace App\Http\Middleware;

use Closure;

class LDCNetwork
{
    /**
     * Handle an incoming request.
     *
     * @param  mixed    $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 .

        /** @var \Illuminate\Http\Request $request */
        return $next($request);
    }
}