) : Dns {
  @Throws(UnknownHostException::class)
  override fun lookup(hostname: String): List<InetAddress> {
    if (!resolvePrivateAddresses || !resolvePublicAddresses) {
      val privateHost = isPrivateHost(hostname)

      if (privateHost && !resolvePrivateAddresses) {
        throw UnknownHostException("private hosts not resolved")
      }

      if (!privateHost && !resolvePublicAddresses) {