MySQL SSH.NET 中的端口转发 - 试图以访问权限禁止的方式访问套接字

MySQL port forwading in SSH.NET - An attempt was made to access a socket in a way forbidden by its access permissions

在我的 VS 上安装了 Plesk。在此之后我无法设置 SSH 隧道以从其他服务器数据库获取数据。使用 SSH.NET 和以下代码。 (此代码在本地工作)。配置为允许 Plesk 防火墙中的端口 3306 进行通信。关于如何解决这个问题有什么建议吗?

错误:

[SocketException (0x271d): An attempt was made to access a socket in a way forbidden by its access permissions]

代码:

DataTable dt = new DataTable();
string IP = "ssh.xxxxxxxx.xxx";
string Username = "xxxxxxxxxx";
string password = "xxxxxxxxxx";
var connInfo = new Renci.SshNet.PasswordConnectionInfo(IP, Username, password);
using (var sshClient = new Renci.SshNet.SshClient(connInfo))
{
    sshClient.Connect();

    if (sshClient.IsConnected)
    {
        Renci.SshNet.ForwardedPortLocal port =
            new Renci.SshNet.ForwardedPortLocal("127.0.0.1", 3306, "xxxxxxxx", 3306);
        sshClient.AddForwardedPort(port);
        port.Start();
        using (MySqlConnection con = new MySqlConnection("SERVER=127.0.0.1;PORT=3306;UID=xxxxxx;PASSWORD=xxxxxxx;DATABASE=xxxxxxx; convert zero datetime=True"))
        {
            string tmpsql = "Select fname,lname,username FROM tbluser Where id=@id";

            using (MySqlCommand cmd = new MySqlCommand(tmpsql, con))
            {
                MySqlDataAdapter da = new MySqlDataAdapter(cmd);
                cmd.Parameters.AddWithValue("id", MySqlDbType.Int16).Value = UserID;
                da.Fill(dt);
            }
        }
    }
    sshClient.Disconnect();
}

您尝试转发的本地端口很可能已被另一个应用程序使用(例如本地 MySQL 数据库服务器)。

使用另一个端口。或者更好的是,让系统选择任何可用的本地端口:

var port = new ForwardedPortLocal("127.0.0.1", "dbserver.example.com", 3306);
client.AddForwardedPort(port);
port.Start();

var connectionString =
    $"SERVER={port.BoundHost};PORT={port.BoundPort};" + 
     "UID=xxxxxx;PASSWORD=xxxxxxx;DATABASE=xxxxxxx; convert zero datetime=True";
using (MySqlConnection con = new MySqlConnection(connectionString))
{
    // ...
}

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