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