Question

我从Windows Server 2008 R2连接到运行vsFTPd 2.0.7的Linux FTP服务器。我通过SSL连接。

以下是它失败的代码行：

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)

Answer 1

从我的谷歌搜索来看，这似乎是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配置vsftpd（使用显式TLS / SSL的文件转换器协议）
验证您是否已生成SSL证书，或在必要时生成证书
修改vsftpd.conf以允许FTPES连接/传输
重新启动vsftpd以使更改生效
确认您运行的是最新版本并在必要时进行升级

<强>更新
还有其他要检查的内容是：http://ftps.codeplex.com/Thread/View.aspx?ThreadId=63605 该线程使用以下代码块示例讨论了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;
}

我该如何解决：由于意外的数据包格式，握手失败了？

1 个答案: