Может подключиться к FTP с помощью Filezilla или WinScp, но не с ftpwebRequest или fluentftp ⇐ C#

[Anonymous]

Я пытаюсь открыть FTP -соединение по SSL в моем коде. Я могу подключить и перечислить каталог, используя Filezilla of Winscp. Но при перечислении каталога через код .net с использованием ftpwebclient я получаю ошибку

(425) не могу открыть соединение данных
< /blockquote>
Поскольку я могу подключаться с помощью Filezilla с того же компьютера, я не уверен, как это сделать устранение неполадок. < /p>
Вот мой код < /p>
public void FtpStuff()
{
string url = "ftp://my.server.com";

FtpWebRequest request = (FtpWebRequest)WebRequest.Create(url);
request.Credentials = new NetworkCredential("myname", "password");
request.EnableSsl = true;
request.Method = WebRequestMethods.Ftp.ListDirectory;
FtpWebResponse response = (FtpWebResponse)request.GetResponse();
StreamReader streamReader = new StreamReader(response.GetResponseStream());

// This is the line that throws the exception
string line = streamReader.ReadLine();
}
< /code>
Я также попробовал Fluentftp. Вот мой код для этого. Я получаю исключение < /p>

Невозможно создать соединение данных: операция не разрешена. < /P>
< /blockquote>
public void FtpStuff()
{
FtpClient client = new FtpClient();
client.Host = "my.server.com";
client.Credentials = new NetworkCredential("myname", "password");
client.EncryptionMode = FtpEncryptionMode.Explicit;
client.Connect();

// This line gives me an exception.
var files = client.GetListing();
}
< /code>
Вот информация о журнале от FluentFtp. Я изменил реальное имя пользователя и IP, но остальные данные (включая порт) являются реальными данными. Мой поставщик услуг FTP указывает, что я должен подключиться к порту 21. Проблема, по -видимому, возникает к концу после выдачи команды epsv и установлено соединение на новом порту.
# Connect()
The thread 0x5514 has exited with code 0 (0x0).
The thread 0xc80 has exited with code 0 (0x0).
The thread 0x89d4 has exited with code 0 (0x0).
Status: Connecting to 123.123.123.123:21
Response: 220 FTP Server Ready
Command: AUTH TLS
Response: 234 AUTH TLS successful
Status: FTPS Authentication Successful
Status: Time to activate encryption: 0h 0m 0s. Total Seconds: 0.1339995.
Command: USER [email protected]
The thread 0x6ddc has exited with code 0 (0x0).
Response: 331 Password required for [email protected]
Status: Testing connectivity using Socket.Poll()...
Command: PASS ***
Response: 230-***************************************************************************
Response: NOTICE TO USERS
Response: This computer system is private property. It is for authorized use only.
Response: Users (authorized or unauthorized) have no explicit or implicit
Response: expectation of privacy.
Response:
Response: Any or all uses of this system and all files on this system may be
Response: intercepted, monitored, recorded, copied, audited and inspected by
Response: using this system, the user consents to such interception, monitoring,
Response: recording, copying, auditing, inspection, and disclosure at the
Response: discretion of such personnel or officials. Unauthorized or improper use
Response: of this system may result in civil and criminal penalties and
Response: administrative or disciplinary action, as appropriate. By continuing to
Response: use this system you indicate your awareness of and consent to these terms
Response: and conditions of use. LOG OFF IMMEDIATELY if you do not agree to the
Response: conditions stated in this warning.
Response: ****************************************************************************
Response: 230 User [email protected] logged in
Command: PBSZ 0
Response: 200 PBSZ 0 successful
Command: PROT P
Response: 200 Protection set to Private
Command: FEAT
Response: 211-Features:
Response: AUTH TLS
Response: CCC
Response: CLNT
Response: EPRT
Response: EPSV
Response: HOST
Response: MDTM
Response: MFF modify;UNIX.group;UNIX.mode;
Response: MFMT
Response: MLST modify*;perm*;size*;type*;unique*;UNIX.group*;UNIX.groupname*;UNIX.mode*;UNIX.owner*;UNIX.ownername*;
Response: PBSZ
Response: PROT
Response: REST STREAM
Response: SIZE
Response: SSCN
Response: TVFS
Response: 211 End
Status: Text encoding: System.Text.ASCIIEncoding
Command: SYST
Response: 215 UNIX Type: L8

# GetListing(null, Auto)

# GetWorkingDirectory()
Command: PWD
Response: 257 "/" is the current directory
Command: TYPE I
Response: 200 Type set to I

# OpenPassiveDataStream(AutoPassive, "MLSD /", 0)
Command: EPSV
Response: 229 Entering Extended Passive Mode (|||50304|)
Status: Connecting to 123.123.123.123:50304
Command: MLSD /
Response: 150 Opening BINARY mode data connection for MLSD
Status: FTPS Authentication Successful
Status: Time to activate encryption: 0h 0m 0s. Total Seconds: 0.1210002.
+---------------------------------------+
-----------------------------------------
Status: Disposing FtpSocketStream...

# CloseDataStream()
Response: 425 Unable to build data connection: Operation not permitted
Status: Disposing FtpSocketStream...
Exception thrown: 'FluentFTP.FtpCommandException' in FluentFTP.dll
< /code>
Вот мои журналы Filezilla.Status: Resolving address of mysite.com
Status: Connecting to 123.123.123.123:21...
Status: Connection established, waiting for welcome message...
Response: 220 FTP Server Ready
Command: AUTH TLS
Response: 234 AUTH TLS successful
Status: Initializing TLS...
Status: Verifying certificate...
Status: TLS connection established.
Command: USER [email protected]
Response: 331 Password required for [email protected]
Command: PASS ************
Response: 230-***************************************************************************
Response: NOTICE TO USERS
Response: This computer system is private property. It is for authorized use only.
Response: Users (authorized or unauthorized) have no explicit or implicit
Response: expectation of privacy.
Response:
Response: Any or all uses of this system and all files on this system may be
Response: intercepted, monitored, recorded, copied, audited and inspected by
Response: using this system, the user consents to such interception, monitoring,
Response: recording, copying, auditing, inspection, and disclosure at the
Response: discretion of such personnel or officials. Unauthorized or improper use
Response: of this system may result in civil and criminal penalties and
Response: administrative or disciplinary action, as appropriate. By continuing to
Response: use this system you indicate your awareness of and consent to these terms
Response: and conditions of use. LOG OFF IMMEDIATELY if you do not agree to the
Response: conditions stated in this warning.
Response: ****************************************************************************
Response: 230 User [email protected] logged in
Command: SYST
Response: 215 UNIX Type: L8
Command: FEAT
Response: 211-Features:
Response: AUTH TLS
Response: CCC
Response: CLNT
Response: EPRT
Response: EPSV
Response: HOST
Response: MDTM
Response: MFF modify;UNIX.group;UNIX.mode;
Response: MFMT
Response: MLST modify*;perm*;size*;type*;unique*;UNIX.group*;UNIX.groupname*;UNIX.mode*;UNIX.owner*;UNIX.ownername*;
Response: PBSZ
Response: PROT
Response: REST STREAM
Response: SIZE
Response: SSCN
Response: TVFS
Response: 211 End
Status: Server does not support non-ASCII characters.
Command: PBSZ 0
Response: 200 PBSZ 0 successful
Command: PROT P
Response: 200 Protection set to Private
Status: Logged in
Status: Retrieving directory listing...
Command: PWD
Response: 257 "/" is the current directory
Command: TYPE I
Response: 200 Type set to I
Command: PASV
Response: 227 Entering Passive Mode (123,123,123,123,197,68).
Command: MLSD
Response: 150 Opening BINARY mode data connection for MLSD
Response: 226 Transfer complete
Status: Directory listing of "/" successful
< /code>
Я также могу подключиться с помощью WinScp. Как предложено в комментариях, я проверил, используется ли идентификатор сеанса TLS/SSL при открытии подключения данных. Кажется, что это так.227 Entering Passive Mode (???)
MLSD
Connecting to ??? ...
Connection pending
Data connection opened
Trying reuse main TLS session ID
Session ID reused
150 Opening data channel for directory listing of "/"


Подробнее здесь: https://stackoverflow.com/questions/656 ... st-or-flue