Filezilla 无法连接到我的 ftp，但我可以在 Windows 资源管理器或浏览器中使用相同的详细信息连接到 ftp

Question

Filezilla 无法连接到我的 ftp，但我可以使用ftp://ftp.xxxxx.com在 Windows 资源管理器或浏览器中使用相同的详细信息连接到 ftp

日志是：

2015-10-05 22:31:27 6908 1 Status: Resolving address of ftp.xxxxx.com
2015-10-05 22:31:27 6908 1 Status: Connecting to 50.87.57.52:21...
2015-10-05 22:31:27 6908 1 Status: Connection established, waiting for welcome message...
2015-10-05 22:31:27 6908 1 Response: 220---------- Welcome to Pure-FTPd [privsep] [TLS] ----------
2015-10-05 22:31:27 6908 1 Response: 220-You are user number 5 of 1000 allowed.
2015-10-05 22:31:27 6908 1 Response: 220-Local time is now 11:01. Server port: 21.
2015-10-05 22:31:27 6908 1 Response: 220-This is a private system - No anonymous login
2015-10-05 22:31:27 6908 1 Response: 220-IPv6 connections are also welcome on this server.
2015-10-05 22:31:27 6908 1 Response: 220 You will be disconnected after 15 minutes of inactivity.
2015-10-05 22:31:27 6908 1 Command: AUTH TLS
2015-10-05 22:31:27 6908 1 Response: 234 AUTH TLS OK.
2015-10-05 22:31:27 6908 1 Status: Initializing TLS...
2015-10-05 22:31:28 6908 1 Status: Verifying certificate...
2015-10-05 22:31:28 6908 1 Status: TLS connection established.
2015-10-05 22:31:28 6908 1 Command: USER upload@xxxxx.com
2015-10-05 22:31:28 6908 1 Response: 331 User xxx@xxxxx.com OK. Password required
2015-10-05 22:31:28 6908 1 Command: PASS *********
2015-10-05 22:31:29 6908 1 Response: 230 OK. Current restricted directory is /
2015-10-05 22:31:29 6908 1 Command: SYST
2015-10-05 22:31:29 6908 1 Response: 215 UNIX Type: L8
2015-10-05 22:31:29 6908 1 Command: FEAT
2015-10-05 22:31:29 6908 1 Response: 211-Extensions supported:
2015-10-05 22:31:29 6908 1 Response:  EPRT
2015-10-05 22:31:29 6908 1 Response:  IDLE
2015-10-05 22:31:29 6908 1 Response:  MDTM
2015-10-05 22:31:29 6908 1 Response:  SIZE
2015-10-05 22:31:29 6908 1 Response:  MFMT
2015-10-05 22:31:29 6908 1 Response:  REST STREAM
2015-10-05 22:31:29 6908 1 Response:  MLST type*;size*;sizd*;modify*;UNIX.mode*;UNIX.uid*;UNIX.gid*;unique*;
2015-10-05 22:31:29 6908 1 Response:  MLSD
2015-10-05 22:31:29 6908 1 Response:  AUTH TLS
2015-10-05 22:31:29 6908 1 Response:  PBSZ
2015-10-05 22:31:29 6908 1 Response:  PROT
2015-10-05 22:31:29 6908 1 Response:  ESTA
2015-10-05 22:31:29 6908 1 Response:  PASV
2015-10-05 22:31:29 6908 1 Response:  EPSV
2015-10-05 22:31:29 6908 1 Response:  SPSV
2015-10-05 22:31:29 6908 1 Response:  ESTP
2015-10-05 22:31:29 6908 1 Response: 211 End.
2015-10-05 22:31:29 6908 1 Status: Server does not support non-ASCII characters.
2015-10-05 22:31:29 6908 1 Command: PBSZ 0
2015-10-05 22:31:30 6908 1 Response: 200 PBSZ=0
2015-10-05 22:31:30 6908 1 Command: PROT P
2015-10-05 22:31:30 6908 1 Response: 200 Data protection level set to "private"
2015-10-05 22:31:30 6908 1 Status: Connected
2015-10-05 22:31:30 6908 1 Status: Retrieving directory listing...
2015-10-05 22:31:30 6908 1 Command: PWD
2015-10-05 22:31:30 6908 1 Response: 257 "/" is your current location
2015-10-05 22:31:30 6908 1 Command: TYPE I
2015-10-05 22:31:30 6908 1 Response: 200 TYPE is now 8-bit binary
2015-10-05 22:31:30 6908 1 Command: PASV
2015-10-05 22:31:31 6908 1 Response: 227 Entering Passive Mode (50,87,57,52,176,86)
2015-10-05 22:31:31 6908 1 Command: MLSD
2015-10-05 22:31:51 6908 1 Error: Connection timed out after 20 seconds of inactivity
2015-10-05 22:31:51 6908 1 Error: Failed to retrieve directory listing
2015-10-05 22:31:51 6908 1 Status: Disconnected from server
2015-10-05 22:31:51 6908 1 Status: Resolving address of ftp.xxxxx.com
2015-10-05 22:31:51 6908 1 Status: Connecting to 50.87.57.52:21...
2015-10-05 22:31:51 6908 1 Status: Connection established, waiting for welcome message...
2015-10-05 22:31:51 6908 1 Response: 220---------- Welcome to Pure-FTPd [privsep] [TLS] ----------
2015-10-05 22:31:51 6908 1 Response: 220-You are user number 6 of 1000 allowed.
2015-10-05 22:31:51 6908 1 Response: 220-Local time is now 11:01. Server port: 21.
2015-10-05 22:31:51 6908 1 Response: 220-This is a private system - No anonymous login
2015-10-05 22:31:51 6908 1 Response: 220-IPv6 connections are also welcome on this server.
2015-10-05 22:31:51 6908 1 Response: 220 You will be disconnected after 15 minutes of inactivity.
2015-10-05 22:31:51 6908 1 Command: AUTH TLS
2015-10-05 22:31:51 6908 1 Response: 234 AUTH TLS OK.
2015-10-05 22:31:51 6908 1 Status: Initializing TLS...
2015-10-05 22:31:52 6908 1 Status: Verifying certificate...
2015-10-05 22:31:52 6908 1 Status: TLS connection established.
2015-10-05 22:31:52 6908 1 Command: USER xxx@xxxxx.com
2015-10-05 22:31:52 6908 1 Response: 331 User xxx@xxxxx.com OK. Password required
2015-10-05 22:31:52 6908 1 Command: PASS *********
2015-10-05 22:31:53 6908 1 Response: 230 OK. Current restricted directory is /
2015-10-05 22:31:53 6908 1 Status: Server does not support non-ASCII characters.
2015-10-05 22:31:53 6908 1 Command: PBSZ 0
2015-10-05 22:31:53 6908 1 Response: 200 PBSZ=0
2015-10-05 22:31:53 6908 1 Command: PROT P
2015-10-05 22:31:53 6908 1 Response: 200 Data protection level set to "private"
2015-10-05 22:31:53 6908 1 Status: Connected
2015-10-05 22:31:53 6908 1 Status: Retrieving directory listing...
2015-10-05 22:31:53 6908 1 Command: PWD
2015-10-05 22:31:54 6908 1 Response: 257 "/" is your current location
2015-10-05 22:31:54 6908 1 Command: TYPE I
2015-10-05 22:31:54 6908 1 Response: 200 TYPE is now 8-bit binary
2015-10-05 22:31:54 6908 1 Command: PASV
2015-10-05 22:31:54 6908 1 Response: 227 Entering Passive Mode (50,87,57,52,180,60)
2015-10-05 22:31:54 6908 1 Command: MLSD
2015-10-05 22:32:14 6908 1 Error: Connection timed out after 20 seconds of inactivity
2015-10-05 22:32:14 6908 1 Error: Failed to retrieve directory listing

Answer 1

我建议尝试两件事来解释差异：

1. 首先尝试将 Filezilla 从 PASV / PASSIVE 模式更改为 ACTIVE 模式。
2. 如果这不起作用，请尝试在 Filezilla 中不加密进行连接（Windows 资源管理器使用的是未加密的 FTP，但 Filezilla 似乎使用的是 TLS 加密）。我建议对 FTP 使用加密，但我只是列出可能有什么不同。