我尝试通过智能手机共享互联网，在我的电脑上也可以使用。当我切换到调制解调器连接时，我可以登录 FTP 服务器，但它不显示目录。
我也尝试在路由器上转发端口 20 和 21，但我不确定是否正确。有人能告诉我这些字段中填了什么吗？ 在此处输入图片描述
我也尝试了主动和被动模式，但没有任何变化。网站是 www.binini.it，我尝试了很多客户端，例如 FileZilla、CoreFtp 和 Cyberduck。我注意到 net2ftp 可以正常工作。
这是 FileZilla 回溯。
Status: Connecting to 209.227.193.130:21...
Status: Connection established, waiting for welcome message...
Status: Insecure server, it does not support FTP over TLS.
Status: Logged in
Status: Retrieving directory listing...
Command: PWD
Response: 257 "/**hidden**" is current directory.
Command: TYPE I
Response: 200 Type set to I.
Command: PASV
Error: Disconnected from server: ECONNABORTED - Connection aborted
Error: Failed to retrieve directory listing
Status: Disconnected from server
Status: Connecting to 209.227.193.130:21...
Status: Connection established, waiting for welcome message...
Status: Insecure server, it does not support FTP over TLS.
Status: Logged in
Status: Retrieving directory listing...
Command: PWD
Response: 257 "/**hidden**" is current directory.
Command: TYPE I
Response: 200 Type set to I.
Command: PASV
Error: Disconnected from server: ECONNABORTED - Connection aborted
Error: Failed to retrieve directory listing
使用 ftp.exe 我可以登录，但在“quote pasv”之后就出现堆栈。终端回答我“远程主机连接已关闭”。
这是完整的调试日志：
Trace: CControlSocket::SendNextCommand()
Trace: CFtpLogonOpData::Send() in state 0
Status: Connecting to 209.227.193.130:21...
Status: Connection established, waiting for welcome message...
Trace: CFtpControlSocket::OnReceive()
Response: 220 Microsoft FTP Service
Trace: CFtpLogonOpData::ParseResponse() in state 1
Trace: CControlSocket::SendNextCommand()
Trace: CFtpLogonOpData::Send() in state 2
Command: AUTH TLS
Trace: CFtpControlSocket::OnReceive()
Response: 534 Local policy on server does not allow TLS secure connections.
Trace: CFtpLogonOpData::ParseResponse() in state 2
Trace: CControlSocket::SendNextCommand()
Trace: CFtpLogonOpData::Send() in state 3
Command: AUTH SSL
Trace: CFtpControlSocket::OnReceive()
Response: 534 Local policy on server does not allow TLS secure connections.
Trace: CFtpLogonOpData::ParseResponse() in state 3
Status: Insecure server, it does not support FTP over TLS.
Trace: CControlSocket::SendNextCommand()
Trace: CFtpLogonOpData::Send() in state 5
Command: USER w8km01a130
Trace: CFtpControlSocket::OnReceive()
Response: 331 Password required for w8km01a130.
Trace: CFtpLogonOpData::ParseResponse() in state 5
Trace: CControlSocket::SendNextCommand()
Trace: CFtpLogonOpData::Send() in state 5
Command: PASS **********
Trace: CFtpControlSocket::OnReceive()
Response: 230 User logged in.
Trace: CFtpLogonOpData::ParseResponse() in state 5
Trace: CControlSocket::SendNextCommand()
Trace: CFtpLogonOpData::Send() in state 6
Command: SYST
Trace: CFtpControlSocket::OnReceive()
Response: 215 Windows_NT
Trace: CFtpLogonOpData::ParseResponse() in state 6
Trace: CControlSocket::SendNextCommand()
Trace: CFtpLogonOpData::Send() in state 7
Command: FEAT
Trace: CFtpControlSocket::OnReceive()
Response: 211-Extended features supported:
Response: LANG EN*
Response: UTF8
Trace: CFtpControlSocket::OnReceive()
Response: AUTH TLS;TLS-C;SSL;TLS-P;
Response: PBSZ
Response: PROT C;P;
Response: CCC
Response: HOST
Trace: CFtpControlSocket::OnReceive()
Response: SIZE
Response: MDTM
Response: REST STREAM
Response: 211 END
Trace: CFtpLogonOpData::ParseResponse() in state 7
Trace: CControlSocket::SendNextCommand()
Trace: CFtpLogonOpData::Send() in state 9
Command: OPTS UTF8 ON
Trace: CFtpControlSocket::OnReceive()
Response: 200 OPTS UTF8 command successful - UTF8 encoding now ON.
Trace: CFtpLogonOpData::ParseResponse() in state 9
Status: Logged in
Trace: Measured latency of 62 ms
Trace: CFtpControlSocket::ResetOperation(0)
Trace: CControlSocket::ResetOperation(0)
Trace: CFileZillaEnginePrivate::ResetOperation(0)
Status: Retrieving directory listing...
Trace: CControlSocket::SendNextCommand()
Trace: CFtpListOpData::ListSend() in state 0
Trace: CFtpChangeDirOpData::Send() in state 0
Trace: CFtpChangeDirOpData::Send() in state 1
Command: PWD
Trace: CFtpControlSocket::OnReceive()
Response: 257 "/w8km01a130" is current directory.
Trace: CFtpChangeDirOpData::ParseResponse() in state 1
Trace: CFtpControlSocket::ResetOperation(0)
Trace: CControlSocket::ResetOperation(0)
Trace: CControlSocket::ParseSubcommandResult(0)
Trace: CFtpListOpData::SubcommandResult() in state 1
Trace: CControlSocket::SendNextCommand()
Trace: CFtpListOpData::ListSend() in state 2
Trace: CFtpRawTransferOpData::Send() in state 1
Command: TYPE I
Trace: CFtpControlSocket::OnReceive()
Response: 200 Type set to I.
Trace: CFtpRawTransferOpData::ParseResponse() in state 1
Trace: CControlSocket::SendNextCommand()
Trace: CFtpRawTransferOpData::Send() in state 2
Command: PASV
Trace: CRealControlSocket::OnClose(106)
Error: Disconnected from server: ECONNABORTED - Connection aborted
Trace: CControlSocket::DoClose(66)
Trace: CFtpControlSocket::ResetOperation(66)
Trace: CControlSocket::ResetOperation(66)
Trace: CFtpControlSocket::ResetOperation(66)
Trace: CControlSocket::ResetOperation(66)
Error: Failed to retrieve directory listing
Trace: CFileZillaEnginePrivate::ResetOperation(66)
Status: Disconnected from server
Trace: CControlSocket::DoClose(66)
Trace: CControlSocket::DoClose(66)
Trace: CControlSocket::DoClose(66)
Trace: CFileZillaEnginePrivate::ResetOperation(0)
Trace: CControlSocket::SendNextCommand()
Trace: CFtpLogonOpData::Send() in state 0
Status: Connecting to 209.227.193.130:21...
Status: Connection established, waiting for welcome message...
Trace: CFtpControlSocket::OnReceive()
Response: 220 Microsoft FTP Service
Trace: CFtpLogonOpData::ParseResponse() in state 1
Trace: CControlSocket::SendNextCommand()
Trace: CFtpLogonOpData::Send() in state 2
Command: AUTH TLS
Trace: CFtpControlSocket::OnReceive()
Response: 534 Local policy on server does not allow TLS secure connections.
Trace: CFtpLogonOpData::ParseResponse() in state 2
Trace: CControlSocket::SendNextCommand()
Trace: CFtpLogonOpData::Send() in state 3
Command: AUTH SSL
Trace: CFtpControlSocket::OnReceive()
Response: 534 Local policy on server does not allow TLS secure connections.
Trace: CFtpLogonOpData::ParseResponse() in state 3
Status: Insecure server, it does not support FTP over TLS.
Trace: CControlSocket::SendNextCommand()
Trace: CFtpLogonOpData::Send() in state 5
Command: USER w8km01a130
Trace: CFtpControlSocket::OnReceive()
Response: 331 Password required for w8km01a130.
Trace: CFtpLogonOpData::ParseResponse() in state 5
Trace: CControlSocket::SendNextCommand()
Trace: CFtpLogonOpData::Send() in state 5
Command: PASS **********
Trace: CFtpControlSocket::OnReceive()
Response: 230 User logged in.
Trace: CFtpLogonOpData::ParseResponse() in state 5
Trace: CControlSocket::SendNextCommand()
Trace: CFtpLogonOpData::Send() in state 9
Command: OPTS UTF8 ON
Trace: CFtpControlSocket::OnReceive()
Response: 200 OPTS UTF8 command successful - UTF8 encoding now ON.
Trace: CFtpLogonOpData::ParseResponse() in state 9
Status: Logged in
Trace: Measured latency of 81 ms
Trace: CFtpControlSocket::ResetOperation(0)
Trace: CControlSocket::ResetOperation(0)
Trace: CFileZillaEnginePrivate::ResetOperation(0)
Status: Retrieving directory listing...
Trace: CControlSocket::SendNextCommand()
Trace: CFtpListOpData::ListSend() in state 0
Trace: CFtpChangeDirOpData::Send() in state 0
Trace: CFtpChangeDirOpData::Send() in state 1
Command: PWD
Trace: CFtpControlSocket::OnReceive()
Response: 257 "/w8km01a130" is current directory.
Trace: CFtpChangeDirOpData::ParseResponse() in state 1
Trace: CFtpControlSocket::ResetOperation(0)
Trace: CControlSocket::ResetOperation(0)
Trace: CControlSocket::ParseSubcommandResult(0)
Trace: CFtpListOpData::SubcommandResult() in state 1
Trace: CControlSocket::SendNextCommand()
Trace: CFtpListOpData::ListSend() in state 2
Trace: CFtpRawTransferOpData::Send() in state 1
Command: TYPE I
Trace: CFtpControlSocket::OnReceive()
Response: 200 Type set to I.
Trace: CFtpRawTransferOpData::ParseResponse() in state 1
Trace: CControlSocket::SendNextCommand()
Trace: CFtpRawTransferOpData::Send() in state 2
Command: PASV
Trace: CRealControlSocket::OnClose(106)
Error: Disconnected from server: ECONNABORTED - Connection aborted
Trace: CControlSocket::DoClose(66)
Trace: CFtpControlSocket::ResetOperation(66)
Trace: CControlSocket::ResetOperation(66)
Trace: CFtpControlSocket::ResetOperation(66)
Trace: CControlSocket::ResetOperation(66)
Error: Failed to retrieve directory listing
Trace: CFileZillaEnginePrivate::ResetOperation(66)
这是我的手机共享连接的回溯：
Trace: CControlSocket::SendNextCommand()
Trace: CFtpLogonOpData::Send() in state 0
Status: Connecting to 209.227.193.130:21...
Status: Connection established, waiting for welcome message...
Trace: CFtpControlSocket::OnReceive()
Response: 220 Microsoft FTP Service
Trace: CFtpLogonOpData::ParseResponse() in state 1
Trace: CControlSocket::SendNextCommand()
Trace: CFtpLogonOpData::Send() in state 2
Command: AUTH TLS
Trace: CFtpControlSocket::OnReceive()
Response: 534 Local policy on server does not allow TLS secure connections.
Trace: CFtpLogonOpData::ParseResponse() in state 2
Trace: CControlSocket::SendNextCommand()
Trace: CFtpLogonOpData::Send() in state 3
Command: AUTH SSL
Trace: CFtpControlSocket::OnReceive()
Response: 534 Local policy on server does not allow TLS secure connections.
Trace: CFtpLogonOpData::ParseResponse() in state 3
Status: Insecure server, it does not support FTP over TLS.
Trace: CControlSocket::SendNextCommand()
Trace: CFtpLogonOpData::Send() in state 5
Command: USER w8km01a130
Trace: CFtpControlSocket::OnReceive()
Response: 331 Password required for w8km01a130.
Trace: CFtpLogonOpData::ParseResponse() in state 5
Trace: CControlSocket::SendNextCommand()
Trace: CFtpLogonOpData::Send() in state 5
Command: PASS **********
Trace: CFtpControlSocket::OnReceive()
Response: 230 User logged in.
Trace: CFtpLogonOpData::ParseResponse() in state 5
Trace: CControlSocket::SendNextCommand()
Trace: CFtpLogonOpData::Send() in state 6
Command: SYST
Trace: CFtpControlSocket::OnReceive()
Response: 215 Windows_NT
Trace: CFtpLogonOpData::ParseResponse() in state 6
Trace: CControlSocket::SendNextCommand()
Trace: CFtpLogonOpData::Send() in state 7
Command: FEAT
Trace: CFtpControlSocket::OnReceive()
Response: 211-Extended features supported:
Trace: CFtpControlSocket::OnReceive()
Response: LANG EN*
Response: UTF8
Trace: CFtpControlSocket::OnReceive()
Response: AUTH TLS;TLS-C;SSL;TLS-P;
Response: PBSZ
Response: PROT C;P;
Response: CCC
Trace: CFtpControlSocket::OnReceive()
Response: HOST
Trace: CFtpControlSocket::OnReceive()
Response: SIZE
Response: MDTM
Response: REST STREAM
Response: 211 END
Trace: CFtpLogonOpData::ParseResponse() in state 7
Trace: CControlSocket::SendNextCommand()
Trace: CFtpLogonOpData::Send() in state 9
Command: OPTS UTF8 ON
Trace: CFtpControlSocket::OnReceive()
Response: 200 OPTS UTF8 command successful - UTF8 encoding now ON.
Trace: CFtpLogonOpData::ParseResponse() in state 9
Status: Logged in
Trace: Measured latency of 276 ms
Trace: CFtpControlSocket::ResetOperation(0)
Trace: CControlSocket::ResetOperation(0)
Trace: CFileZillaEnginePrivate::ResetOperation(0)
Status: Retrieving directory listing...
Trace: CControlSocket::SendNextCommand()
Trace: CFtpListOpData::ListSend() in state 0
Trace: CFtpChangeDirOpData::Send() in state 0
Trace: CFtpChangeDirOpData::Send() in state 1
Command: PWD
Trace: CFtpControlSocket::OnReceive()
Response: 257 "/w8km01a130" is current directory.
Trace: CFtpChangeDirOpData::ParseResponse() in state 1
Trace: CFtpControlSocket::ResetOperation(0)
Trace: CControlSocket::ResetOperation(0)
Trace: CControlSocket::ParseSubcommandResult(0)
Trace: CFtpListOpData::SubcommandResult() in state 1
Trace: CControlSocket::SendNextCommand()
Trace: CFtpListOpData::ListSend() in state 2
Trace: CFtpRawTransferOpData::Send() in state 1
Command: TYPE I
Trace: CFtpControlSocket::OnReceive()
Response: 200 Type set to I.
Trace: CFtpRawTransferOpData::ParseResponse() in state 1
Trace: CControlSocket::SendNextCommand()
Trace: CFtpRawTransferOpData::Send() in state 2
Command: PASV
Trace: CFtpControlSocket::OnReceive()
Response: 227 Entering Passive Mode (66,71,190,20,195,87).
Trace: CFtpRawTransferOpData::ParseResponse() in state 2
Trace: CControlSocket::SendNextCommand()
Trace: CFtpRawTransferOpData::Send() in state 4
Trace: Destination IP of data connection does not match peer IP of control connection. Not binding source address of data connection.
Command: LIST
Trace: CTransferSocket::OnConnect
Trace: CFtpControlSocket::OnReceive()
Response: 150 Opening BINARY mode data connection.
Trace: CFtpRawTransferOpData::ParseResponse() in state 4
Trace: CControlSocket::SendNextCommand()
Trace: CFtpRawTransferOpData::Send() in state 5
Trace: CFtpControlSocket::OnReceive()
Response: 226 Transfer complete.
Trace: CFtpRawTransferOpData::ParseResponse() in state 5
Trace: CControlSocket::SendNextCommand()
Trace: CFtpRawTransferOpData::Send() in state 8
Trace: CTransferSocket::OnReceive(), m_transferMode=0
Trace: CTransferSocket::OnClose(0)
Trace: CTransferSocket::TransferEnd(1)
Trace: CFtpControlSocket::TransferEnd()
Trace: CFtpControlSocket::ResetOperation(0)
Trace: CControlSocket::ResetOperation(0)
Trace: CControlSocket::ParseSubcommandResult(0)
Trace: CFtpListOpData::SubcommandResult() in state 3
Trace: CControlSocket::SendNextCommand()
Trace: CFtpListOpData::ListSend() in state 4
Status: Calculating timezone offset of server...
Command: MDTM Main.Master
Trace: CFtpControlSocket::OnReceive()
Response: 213 20170703210504
Trace: CFtpListOpData::ParseResponse() in state 4
Status: Timezone offset of server is 7200 seconds.
Trace: CFtpControlSocket::ResetOperation(0)
Trace: CControlSocket::ResetOperation(0)
Status: Directory listing of "/w8km01a130" successful
Trace: CFileZillaEnginePrivate::ResetOperation(0)
答案1
从成功的跟踪来看：
状态：正在连接到 209.227.193.130:21…… 命令：PASV
响应 ：227 进入被动模式 (66,71,190,20,195,87)。 …… 跟踪：数据连接的目标 IP 与控制连接的对等 IP 不匹配……
对被动命令的响应是说，服务器应该连接到 66.71.190.20 端口 50007 (195*256+87) 进行数据连接。请注意，此 IP 地址与您连接的服务器的地址不同。虽然理论上原始 FTP 协议支持这种操作模式，即控制连接的服务器与数据连接的服务器不同，但这种情况非常罕见，更可能是由服务器端的配置错误引起的。根据 tracepath，我认为这实际上是同一服务器上的不同地址。
这可能是传输失败的原因。在 TP-Link 路由器的日志中，您会发现对 PASV 命令的以下反应：
命令：PASV
错误：与服务器断开连接：ECONNABORTED - 连接中止
我将其解释为路由器上的 FTP 辅助程序中止了 FTP 连接，因为 PASV 命令导致了意外响应，因为应用于数据连接的 PASV 内的 IP 与控制连接的 IP 不匹配。
这也解释了为什么问题只发生在这台特定的服务器上，因为所有其他服务器都没有出现这种异常行为。
但是，如果这实际上只是同一服务器上的一个不同地址，您可以尝试 FTP 连接到 66.71.190.20，而不是 209.227.193.130。希望第一个会成功，因为控制连接中的 IP 和 PASV 响应是相同的。
答案2
FTP 只是一个噩梦般的协议，因为它使用动态端口，相关端口号的交换是在应用层完成的。这意味着防火墙或 NAT 路由器或 ISP 和移动提供商（对于运营商级 NAT）中经常会涉及帮助程序，这些程序可能有效，也可能无效。
问题尤其出现在使用 FTPS（即加密 FTP）时，因为流量是加密的，所以辅助应用程序无法获取端口号。问题还出现在较新的命令中，这些命令被添加以支持 IPv6，但它们也经常在没有 IPv6 的情况下使用（即 EPRT、EPSV 而不是 PORT 和 PASV）。
简而言之：尽量使用 SFTP 而不是 FTP/FTPS。SFTP 是基于 SSH 的文件传输，更安全，并且没有 FTP(S) 关于动态端口的问题。当然，服务器需要支持它。