shlink/config/autoload/ip-address.global.php

<?php

declare(strict_types=1);

use Psr\Container\ContainerInterface;
use RKA\Middleware\IpAddress;
use RKA\Middleware\Mezzio\IpAddressFactory;
use Shlinkio\Shlink\Core\Middleware\ReverseForwardedAddressesMiddlewareDecorator;

use const Shlinkio\Shlink\IP_ADDRESS_REQUEST_ATTRIBUTE;

return [

    // Configuration for RKA\Middleware\IpAddress
    'rka' => [
        'ip_address' => [
            'attribute_name' => IP_ADDRESS_REQUEST_ATTRIBUTE,
            'check_proxy_headers' => true,
            'trusted_proxies' => [],
            'headers_to_inspect' => [
                'CF-Connecting-IP',
                'X-Forwarded-For',
                'X-Forwarded',
                'Forwarded',
                'True-Client-IP',
                'X-Real-IP',
                'X-Cluster-Client-Ip',
                'Client-Ip',
            ],
        ],
    ],

    'dependencies' => [
        'factories' => [
            IpAddress::class => IpAddressFactory::class,
        ],
        'delegators' => [
            // Make middleware decoration transparent to other parts of the code
            IpAddress::class => [
                function (
                    ContainerInterface $container,
                    string $name,
                    callable $callback
                ): ReverseForwardedAddressesMiddlewareDecorator {
                    return new ReverseForwardedAddressesMiddlewareDecorator($callback());
                },
            ],
        ],

    ],

];