Configure trust proxies

config/trustproxies.php

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+<?php
+
+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 $request->getClientIp()
+     * always gets the originating client IP, no matter
+     * how many proxies that client's request has
+     * subsequently passed through.
+     */
+    'proxies' => explode(env('TRUST_PROXIES', ''), ','),
+
+    /*
+     * Default Header Names
+     *
+     * Change these if the proxy does
+     * not send the default header names.
+     *
+     * Note that headers such as X-Forwarded-For
+     * are transformed to HTTP_X_FORWARDED_FOR format.
+     *
+     * The following are Symfony defaults, found in
+     * \Symfony\Component\HttpFoundation\Request::$trustedHeaders
+     *
+     * You may optionally set headers to 'null' here if you'd like
+     * for them to be considered untrusted instead. Ex:
+     *
+     * Illuminate\Http\Request::HEADER_CLIENT_HOST  => null,
+     * 
+     * WARNING: If you're using AWS Elastic Load Balancing or Heroku,
+     * the FORWARDED and X_FORWARDED_HOST headers should be set to null 
+     * as they are currently unsupported there.
+     */
+    'headers' => [
+        (defined('Illuminate\Http\Request::HEADER_FORWARDED') ? Illuminate\Http\Request::HEADER_FORWARDED : 'forwarded') => 'FORWARDED',
+        Illuminate\Http\Request::HEADER_CLIENT_IP    => 'X_FORWARDED_FOR',
+        Illuminate\Http\Request::HEADER_CLIENT_HOST  => 'X_FORWARDED_HOST',
+        Illuminate\Http\Request::HEADER_CLIENT_PROTO => 'X_FORWARDED_PROTO',
+        Illuminate\Http\Request::HEADER_CLIENT_PORT  => 'X_FORWARDED_PORT',
+    ]
+];