ctrlpanel/config/trustedproxy.php

<?php

use Illuminate\Http\Request;

return [
    /*
     * Set trusted proxy IP addresses.
     *
     * Both IPv4 and IPv6 addresses are
     * supported, along with CIDR notation.
     *
     * The "*" character is syntactic sugar
     * within TrustedProxy to trust any proxy
     * that connects directly to your server,
     * a requirement when you cannot know the address
     * of your proxy (e.g. if using Rackspace balancers).
     *
     * The "**" character is syntactic sugar within
     * TrustedProxy to trust not just any proxy that
     * connects directly to your server, but also
     * proxies that connect to those proxies, and all
     * the way back until you reach the original source
     * IP. It will mean that $request->getClientIp()
     * always gets the originating client IP, no matter
     * how many proxies that client's request has
     * subsequently passed through.
     */
    'proxies' => in_array(env('TRUSTED_PROXIES', []), ['*', '**']) ?
        env('TRUSTED_PROXIES') : explode(',', env('TRUSTED_PROXIES', null)),

    /*
     * Or, to trust all proxies that connect
     * directly to your server, uncomment this:
     */
    // 'proxies' => '*',

    /*
     * Or, to trust ALL proxies, including those that
     * are in a chain of forwarding, uncomment this:
     */
    // 'proxies' => '**',

    /*
     * Default Header Names
     *
     * Change these if the proxy does
     * not send the default header names.
     *
     * Note that headers such as X-Forwarded-For
     * are transformed to HTTP_X_FORWARDED_FOR format.
     *
     * The following are Symfony defaults, found in
     * \Symfony\Component\HttpFoundation\Request::$trustedHeaders
     */
    'headers' => \Illuminate\Http\Request::HEADER_X_FORWARDED_FOR | Request::HEADER_X_FORWARDED_HOST | Request::HEADER_X_FORWARDED_PORT | Request::HEADER_X_FORWARDED_PROTO | Request::HEADER_X_FORWARDED_AWS_ELB,
];