snipe-it/config/trustedproxy.php

<?php

/*
 |--------------------------------------------------------------------------
 | DO NOT EDIT THIS FILE DIRECTLY.
 |--------------------------------------------------------------------------
 | This file reads from your .env configuration file and should not
 | be modified directly.
*/

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 ELB or similar).
     *
     * 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' => env('APP_TRUSTED_PROXIES') !== null ?
        explode(',', env('APP_TRUSTED_PROXIES')) : '*',

    /*
     * To trust one or more specific proxies that connect
     * directly to your server, use an array of IP addresses:
     */
    // 'proxies' => ['192.168.1.1'],

    /*
     * Or, to trust all proxies that connect
     * directly to your server, use a "*"
     */
    // 'proxies' => '*',

    /*
     * Which headers to use to detect proxy related data (For, Host, Proto, Port)
     *
     * Options include:
     *
     * - Illuminate\Http\Request::HEADER_X_FORWARDED_ALL (use all x-forwarded-* headers to establish trust)
     * - Illuminate\Http\Request::HEADER_FORWARDED (use the FORWARDED header to establish trust)
     *
     * @link https://symfony.com/doc/current/deployment/proxies.html
     */
//    'headers' => Illuminate\Http\Request::HEADER_X_FORWARDED_ALL, //this is mostly handled already

];