Archived Forum Post
Index of archived forum posts
Question:
Archived Forum PostQuestion:
I am attempting to connect to RaspberryPi 3 Windows 10 IoT which is running ftpd. I can connect to it using Filezilla without any issues. I installed the latest from NuGet in Visual Studio 2017 Enterprise.
Below is the sample code I am using to attempt to connect. It fails at ftp.ConnectAsync() with:
ChilkatLog: Connect_Ftp2: DllDate: May 29 2017 ChilkatVersion: 9.5.0.68 UnlockPrefix: Anything for 30-day trial Architecture: Little Endian; 32-bit VerboseLogging: 0 ProgressMonitoring: enabled: yes heartbeatMs: 0 sendBufferSize: 65536 --ProgressMonitoring ImplicitSsl: 0 AuthTls: 0 AuthSsl: 0 ftpConnect: Hostname: 10.200.10.207 Port: 21 IdleTimeoutMs: 60000 readCommandResponse: Failed to receive more bytes. Failed to read FTP control channel reply. --readCommandResponse initialStatus: 0 initialResponse: --ftpConnect Failed to connect to FTP server. Failed. --Connect_Ftp2 --ChilkatLog
Chilkat.Ftp2 ftp = new Chilkat.Ftp2();
bool success;
// Any string unlocks the component for the 1st 30-days.
success = ftp.UnlockComponent("Anything for 30-day trial");
if (success != true)
{
Debug.WriteLine(ftp.LastErrorText);
return;
}
ftp.Hostname = "10.200.10.207";
ftp.Username = "User";
ftp.Password = "Password";
ftp.Port = 21;
// Connect and login to the FTP server.
success = await ftp.ConnectAsync();
if (success != true)
{
Debug.WriteLine(ftp.LastErrorText);
return;
}
// Set the transfer mode to ASCII
success = await ftp.SetTypeAsciiAsync();
if (success != true)
{
Debug.WriteLine(ftp.LastErrorText);
return;
}
// Change to the remote directory where the file will be uploaded.
success = await ftp.ChangeRemoteDirAsync("junk");
if (success != true)
{
Debug.WriteLine(ftp.LastErrorText);
return;
}
// Upload a file.
string localFilename = "hamlet.xml";
string remoteFilename = "hamlet.xml";
// Turn on session logging for the upload:
ftp.KeepSessionLog = true;
success = await ftp.PutFileAsync(localFilename, remoteFilename);
if (success != true)
{
Debug.WriteLine(ftp.LastErrorText);
return;
}
// View the session log. You can verify visually that
// the transfer was in ascii mode.
Debug.WriteLine(ftp.SessionLog);
success = await ftp.DisconnectAsync();
Debug.WriteLine("File Uploaded!");
Just an update. I added:| int failReason = ftp.ConnectFailReason;
Debug.WriteLine("connect fail reason = " + Convert.ToString(failReason));
Which returns: connect fail reason = 200
I cannot find this reason documented.
Thanks
Windows Firewall blocks the port. You can make exceptions for particular applications in Windows Firewall (i.e. .exe files). When FileZilla installs, it adds a rule to Windows Firewall to make an exception for it. You need to make an exception for your application's .exe, or just add a rule to Windows Firewall to allow outbound port 21.
It's really important that people understand how their firewalls work - whether it be software or hardware. Take some time to learn about it. Without understanding, 2 things happen:
1) Your system could be insecure without you having a clue.
2) You end up being flummoxed and wasting a good portion of your life wondering why things don't work.
So, I double checked the firewall yesterday. My project app is set to be allowed through the firewall. Again, I even turned off the firewall. I don't run any 3rd party anti-virus. Just windows Defender. I even turned that off for a test.
I am running Windows 10 Pro. Visual Studios 2017 Enterprise. A Raspberry Pi 3 with Windows IoT installed and running their ftpd daemon.
I will continue working on this issue. I am evaluating this for the company. We are excited to use this if we can.
I am going to work with another person locally to see if we can get this resolved.
On re-reading the error message, it looks as though the TCP connection was established, but the initial greeting from the FTP server was not received.