Cablemodem/app/AppKernel.php

<?php

use Symfony\Component\HttpKernel\Kernel;
use Symfony\Component\Config\Loader\LoaderInterface;
use Symfony\Component\HttpKernel\HttpKernelInterface;
use Symfony\Component\HttpFoundation\Request;

class AppKernel extends Kernel
{
    public function registerBundles()
    {
        $bundles = [
            new Symfony\Bundle\FrameworkBundle\FrameworkBundle(),
            new Symfony\Bundle\SecurityBundle\SecurityBundle(),
            new Symfony\Bundle\TwigBundle\TwigBundle(),
            new Symfony\Bundle\MonologBundle\MonologBundle(),
            new Symfony\Bundle\SwiftmailerBundle\SwiftmailerBundle(),
            new Doctrine\Bundle\DoctrineBundle\DoctrineBundle(),
            new Sensio\Bundle\FrameworkExtraBundle\SensioFrameworkExtraBundle(),
            new Sonata\CoreBundle\SonataCoreBundle(),
            new Sonata\BlockBundle\SonataBlockBundle(),
            new Sonata\DoctrineORMAdminBundle\SonataDoctrineORMAdminBundle(),
            new Sonata\AdminBundle\SonataAdminBundle(),
            new Knp\Bundle\MenuBundle\KnpMenuBundle(),
            new FOS\RestBundle\FOSRestBundle(),
            new Voryx\RESTGeneratorBundle\VoryxRESTGeneratorBundle(),
            new JMS\SerializerBundle\JMSSerializerBundle($this),
            new Nelmio\CorsBundle\NelmioCorsBundle(),
            new Stof\DoctrineExtensionsBundle\StofDoctrineExtensionsBundle(),
            new HWI\Bundle\OAuthBundle\HWIOAuthBundle(),
            new OldSound\RabbitMqBundle\OldSoundRabbitMqBundle(),
            new Doctrine\Bundle\MigrationsBundle\DoctrineMigrationsBundle(),
            new SimpleThings\EntityAudit\SimpleThingsEntityAuditBundle(),
            new Base\AdminBundle\BaseAdminBundle(),
            new Base\OAuthClientBundle\BaseOAuthClientBundle(),
            new WebserviceBundle\WebserviceBundle(),
            new WorkflowBundle\WorkflowBundle(),
            new TemplateBundle\TemplateBundle(),
            new ExtraDataBundle\ExtraDataBundle(),
            new DeviceBundle\DeviceBundle(),
            new OwnerVoterBundle\OwnerVoterBundle(),
            new MigrationsBundle\MigrationsBundle(),
            new MapBundle\MapBundle(),
            new LeafletBundle\LeafletBundle(),
            new AuthBundle\AuthBundle(),
            new AuditBundle\AuditBundle(),
            new CablemodemBundle\CablemodemBundle(),
            new CheckSintaxBundle\CheckSintaxBundle()
        ];

        if (in_array($this->getEnvironment(), ['dev', 'test'], true)) {
            $bundles[] = new Symfony\Bundle\DebugBundle\DebugBundle();
            $bundles[] = new Symfony\Bundle\WebProfilerBundle\WebProfilerBundle();
            $bundles[] = new Sensio\Bundle\DistributionBundle\SensioDistributionBundle();
            $bundles[] = new Sensio\Bundle\GeneratorBundle\SensioGeneratorBundle();
        }

        $bundles[] = new Symfony\Bundle\WebServerBundle\WebServerBundle();

        return $bundles;
    }

    public function getRootDir()
    {
        return __DIR__;
    }

    public function getCacheDir()
    {
        return dirname(__DIR__).'/var/cache/'.$this->getEnvironment();
    }

    public function getLogDir()
    {
        return dirname(__DIR__).'/var/logs';
    }

    public function registerContainerConfiguration(LoaderInterface $loader)
    {
        $loader->load($this->getRootDir().'/config/config_'.$this->getEnvironment().'.yml');
    }

    /**
     * {@inheritdoc}
     */
    public function handle(Request $request, $type = HttpKernelInterface::MASTER_REQUEST, $catch = true)
    {
        if (false === $this->booted) {
            $this->boot();
        }
        // se puede sacar la variable nginx-proxy porque es el nombre del docker y puede variar
        // con REMOTRA_ADDR obtengo el mismo valor (http://symfony.com/doc/current/deployment/proxies.html)
        //gethostbyname("nginx-proxy") == $request->server->get('REMOTE_ADDR')
        if ($this->container->hasParameter("nginx_name")) {
            Request::setTrustedProxies(
                array('127.0.0.1', $this->container->getParameter("nginx_name")),
                Request::HEADER_X_FORWARDED_FOR);
        }
        return parent::handle($request, $type, $catch);
    }
}