ftp - 如何修复: The handshake failed due to an unexpected packet format?

我正在从Windows Server 2008 R2连接到运行vsFTPd 2.0.7的Linux FTP服务器。我正在通过SSL连接。

这是它失败的代码行:

sslStream = new SslStream(stream, false, CertificateValidation);

这是日志:

220 (vsFTPd 2.0.7)
AUTH SSL
234 Proceed with negotiation.

我收到以下错误:

System.IO.IOException: The handshake failed due to an unexpected packet format.
   at System.Net.Security.SslState.StartReadFrame(Byte[] buffer, Int32 readBytes, AsyncProtocolRequest asyncRequest)
   at System.Net.Security.SslState.StartReceiveBlob(Byte[] buffer, AsyncProtocolRequest asyncRequest)
   at System.Net.Security.SslState.ForceAuthentication(Boolean receiveFirst, Byte[] buffer, AsyncProtocolRequest asyncRequest)
   at System.Net.Security.SslState.ProcessAuthentication(LazyAsyncResult lazyResult)
   at KellermanSoftware.NetFtpLibrary.ProxySocket.InitSsl()
   at KellermanSoftware.NetFtpLibrary.FTP.Connect(Boolean implicitConnection)

最佳答案

从我的Google搜索看来，这是vsftpd的常见问题。
http://www.question-defense.com/2010/02/04/vsftpd-error-gnutls-error-9-a-tls-packet-with-unexpected-length-was-received

您可以查看该文章以获取解决方案的提示

归结为:

为ftpes(具有显式TLS/SSL的文件传输协议(protocol))配置vsftpd

验证您已生成SSL证书，或在必要时生成一个

修改vsftpd.conf以允许FTPES连接/传输

重新启动vsftpd以使更改生效

确认您正在运行最新版本，并在必要时升级

更新
其他需要检查的是:http://ftps.codeplex.com/Thread/View.aspx?ThreadId=63605
该线程使用以下代码块示例讨论隐式和显式模式之间的区别:

private Stream GetDataStream()
{
    Stream s = null;

    if (SslSupportCurrentMode == ESSLSupportMode.Implicit)
    {
        s = dataClient.GetStream();
    }
    else if ((sslSupportCurrentMode & ESSLSupportMode.DataChannelRequested) == ESSLSupportMode.DataChannelRequested)
    {
        if (dataSslStream == null)
            dataSslStream = CreateSSlStream(dataClient.GetStream(), false);
        s = dataSslStream;
    }
    else
    {
        s = dataClient.GetStream();
    }

    return s;
}

关于ftp - 如何修复: The handshake failed due to an unexpected packet format?，我们在Stack Overflow上找到一个类似的问题：https://stackoverflow.com/questions/2456786/