使用FluentFTP C#连接GoDaddy托管WordPress FTP超时问题排查

多次调用以下Connect方法时均抛出TimeoutException，但通过FileZilla可正常连接GoDaddy FTP服务器，怀疑是代码配置存在疏漏。

public void Connect()
{
    this.FluentClient.Config.RetryAttempts = 5;
    this.FluentClient.Config.EncryptionMode = FtpEncryptionMode.Implicit;
    this.FluentClient.Config.DataConnectionEncryption = true;
    this.FluentClient.Config.ValidateAnyCertificate = true;
    this.FluentClient.Config.DataConnectionType = FtpDataConnectionType.AutoActive;
    this.FluentClient.Config.DownloadDataType = FtpDataType.Binary;
    this.FluentClient.Config.SocketKeepAlive = true;
    this.FluentClient.Config.StaleDataCheck = true;
    this.FluentClient.Config.ConnectTimeout = 3000;
    this.FluentClient.Config.ReadTimeout = 30000;
    this.FluentClient.Config.DataConnectionConnectTimeout = 30000;
    this.FluentClient.Config.DataConnectionReadTimeout = 30000;

    this.FluentClient.Connect();
}

• .NET Framework 4.7.2
• FluentFTP 50.0.1
• GoDaddy托管WordPress FTP

• 可通过FileZilla正常连接该FTP账号
• GoDaddy官方文档明确说明，托管WordPress使用的SFTP仅支持主动模式
• 通过cmd命令行登录时同样出现超时错误

内容的提问来源于stack exchange，提问作者Amen Jlili