|string|null */ protected $proxies; /** * The headers that should be used to detect proxies. * * @var int */ protected $headers = RequestAlias::HEADER_X_FORWARDED_FOR | RequestAlias::HEADER_X_FORWARDED_HOST | RequestAlias::HEADER_X_FORWARDED_PORT | RequestAlias::HEADER_X_FORWARDED_PROTO | RequestAlias::HEADER_X_FORWARDED_AWS_ELB; }