atus.Internal
  public static @NotNull ValidHostInfo isValidHost(@NotNull String host) {
    try {
      HostAndPort parsedHost = HostAndPort.fromString(host);
      if (parsedHost.hasPort()) {
        return ValidHostInfo.INVALID;
      }
      host = parsedHost.getHost();

      try {
        InetAddresses.forString(host);
        return ValidHostInfo.VALID;
      }
      catch (IllegalArgumentException e) {
        // it is not an IPv4 or IPv6 literal
      }

      InternetDomainName.from(host);
    }
    catch (IllegalArgumentException e) {
      return ValidHostInfo.INVALID;
    }

    return ValidHostInfo.VALID_PROXY;
  }
}

atus.Internal
  public static @NotNull ValidHostInfo isValidHost(@NotNull String host) {
   