Solved

I can't connect to my website after connection drops during FTP transfer

Posted on 2009-05-18
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Last Modified: 2013-12-25
I know this is a strange problem, but here's what happens:

My connection is really spotty, and regularly goes down for a minute or so every 5-10 minutes. If I'm making a large transfer of many files to my website via FTP, and the site goes down, it can't connect again after the internet comes back up. Not only can my FTP client (Filezilla) not connect, but I can't reach the site in any way, via browser or otherwise. I know the site doesn't go down when this happens, because other people can reach it.

Any ideas? Thanks in advance!
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Question by:cowboygeek
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15 Comments
 
LVL 22

Expert Comment

by:cj_1969
ID: 24420745
Sounds like a workstation problem.
What do you have to do to get the conenction going again?
Do you have to reboot or is there an app that you can stop and restart to get things working?
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LVL 30

Expert Comment

by:IanTh
ID: 24424106
it will be the ftp clients is still got data in its buffers and that needs to be sent or timed out before its port is released imho
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LVL 22

Assisted Solution

by:cj_1969
cj_1969 earned 100 total points
ID: 24424235
good idea ... but does that explain not being able to access the site via a browser?
This sounds to me like something is going on with the IP stack or DNS cache on them workstation if all traffic to the destination is having problems.

Does this only happen from one workstation?  If this is a home connection then check your router, you might need to do a firmware upgrade on it.  
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LVL 28

Expert Comment

by:lesouef
ID: 24427076
the server may have a connection limit per IP address, therefore you must wait for the time out to complete to connect again
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Author Comment

by:cowboygeek
ID: 24428281
As far as I know, this only happens from my desktop machine, but I've never tried it from a different one. If it was a connection limit per IP address, why would it go down when my internet dropped out? Is that just a coincidence?
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LVL 28

Assisted Solution

by:lesouef
lesouef earned 100 total points
ID: 24429905
because the session is not closed by a exit/bye command, therefore it is still alive on server, untill the server time out process kills it.
if the server is limited to only one session, you have to wait for the time-out if you've been disconnected the wild way.
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LVL 30

Assisted Solution

by:IanTh
IanTh earned 300 total points
ID: 24431605
ftp buffer timeout causing problem to ip stack
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LVL 22

Expert Comment

by:cj_1969
ID: 24431690
Do you know if the "internet connection going down" is the workstation or the router?
Do you have another workstation on the network?  Try running some tests by doing stuff from both machines.  If the problem is the router, upgrade the firmware.  

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Author Comment

by:cowboygeek
ID: 24434415
The workstation goes down because there is a router between my house and the main source that reboots itself every 10 minutes or so. The ISP is trying to fix the problem.
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Author Comment

by:cowboygeek
ID: 24434421
Bottom line, is there a way to fix the IP stacking (if that's what it is) without fixing the router (since I have no way to fix it)?
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Author Comment

by:cowboygeek
ID: 24434430
Er, is there a way to fix the problem with the IP stack, I meant.
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LVL 22

Expert Comment

by:cj_1969
ID: 24434498
Try updating the driver for your network card.  It should be the piece of software that is controlling this aspect of the IP stack.

At least its not your workstation or router that is causing the problem  :)
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LVL 30

Accepted Solution

by:
IanTh earned 300 total points
ID: 24434634
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Author Closing Comment

by:cowboygeek
ID: 31582882
I think the winsock solution fixed it. Thanks everyone for you collective problem solving skills!
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LVL 22

Expert Comment

by:cj_1969
ID: 24440378
Sweet.  I hope I remember this the next time I run into an IP problem  :)
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