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| Author | Forum: PowerTCP FTP for .NET Topic: The connection is broken after uploading a 15-20 files to the server. |
| isaacdiaz From: San Marcos, CA USA Posts: 2 Member Since: 12/14/05 |
posted January 11, 2006 10:19 PM Hello, I am using the RawConnect method to initiate a secure FTP session with my server. everything works ok and I can upload files without problem. After uploading 17 files or so, the connection is closed and I have to login back again. I am logging the TCP messages with ethereal and it looks like every time the data connection gets closed a error message is sent by the server. Looking at the tcp messages this is the TCP packet I receive each time I disconnect: Transmission Control Protocol, Src Port: 30064 (30064), Dst Port: 3858 (3858), Seq: 1779, Ack: 2896222376, Len: 0 Source port: 30064 (30064) Destination port: 3858 (3858) Sequence number: 1779 (relative sequence number) Header length: 20 bytes Flags: 0x0004 (RST) 0... .... = Congestion Window Reduced (CWR): Not set .0.. .... = ECNEcho: Not set ..0. .... = Urgent: Not set ...0 .... = Acknowledgment: Not set .... 0... = Push: Not set .... .1.. = Reset: Set .... ..0. = Syn: Not set .... ...0 = Fin: Not set Window size: 0 Checksum: 0xf603 [correct] I think the firewall after sending me many of this packets closes my connection. What parameters can I use to control the way the data connection gets closed? |
Tony Priest From: Utica, NY USA Posts: 8466 Member Since: 04/11/00 |
posted January 12, 2006 9:35 AM I've never heard of anything like that happening before. Do you have the same problem if you use your program somewhere else? What happens if you use our sample app? |
| isaacdiaz From: San Marcos, CA USA Posts: 2 Member Since: 12/14/05 |
posted February 6, 2006 12:38 PM sorry I couldn't get back before. To document this issue solution, the problem was not at the TCP/IP level. The problem was that some of the passive ports the server was sending as response to the PASV command were not open on the firewall. So when I got a closed passive port my passive connection didn't go through. thanks. |
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