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AuthorForum: PowerTCP FTP for .NET
Topic: did not respond after a period...
Terrence

From: Austin, TX USA
Posts: 13
Member Since: 04/22/04		 posted May 3, 2004 11:31 AM
I can "put" a file to this ftp site from the dos prompt, but it fails when I use your great tool. Ideas on why the connection times out?

ftp1.Username = subscriber.ftpusername.Trim();
ftp1.Password = subscriber.ftppassword.Trim();
ftp1.ServerPort = Convert.ToInt16(subscriber.ftpport);
ftp1.Server = subscriber.ftpaddress.Trim();
ftp1.FileType = Dart.PowerTCP.Ftp.FileType.Image;
ftp1.DoEvents = true;
ftp1.Passive = true;
ftp1.Restart = false;


Subscriber: MAC
220 OMAC_NT_003 Microsoft FTP Service (Version 5.0).
 
USER *****
 
331 Password required for *******
 
PASS *****
 
230 User ******* logged in.
 
TYPE I
 
200 Type set to I.
 
PASV
 
227 Entering Passive Mode (216,141,245,242,18,114).
 
MAC 10:00:29 AM
Start Process 10:00:29 AM
ERROR: A connection attempt failed because the connected party did not properly respond after a period of time, or established connection failed because connected host has failed to respond
Tony Priest



From: Utica, NY USA
Posts: 8466
Member Since: 04/11/00		 posted May 3, 2004 11:41 AM
In this scenario, the server is 216.141.245.242 and it has set up a data connection to be established on port 4722.

For some reason the client is not able to connect to that server/port combination. Perhaps a firewall is blocking it?

What happens if you set passive to false?
Terrence

From: Austin, TX USA
Posts: 13
Member Since: 04/22/04		 posted May 3, 2004 12:25 PM
When I set it to Passive = false, it works.

Could you please comment on this behavior?

Thanks for your help.
Tony Priest



From: Utica, NY USA
Posts: 8466
Member Since: 04/11/00		 posted May 3, 2004 12:55 PM
When passive = true, the server sets up a listener for the client to connect to for the data connection.

When passive = false, the client sets up the listener

In your case the server is able to connect to the client but not vice versa.

I suspect a firewall is causing the trouble you are having.
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