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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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by:cj_1969
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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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by:IanTh
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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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by:cj_1969
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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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by:lesouef
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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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by:cowboygeek
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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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by:lesouef
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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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by:IanTh
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ftp buffer timeout causing problem to ip stack
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by:cj_1969
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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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by:cowboygeek
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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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by:cowboygeek
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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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by:cowboygeek
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Er, is there a way to fix the problem with the IP stack, I meant.
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by:cj_1969
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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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IanTh earned 300 total points
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by:cowboygeek
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I think the winsock solution fixed it. Thanks everyone for you collective problem solving skills!
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by:cj_1969
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Sweet.  I hope I remember this the next time I run into an IP problem  :)
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